Motorised valve

Abstract

An electric valve, comprising a valve body; the valve body comprises a valve seat assembly, a fixed gear, a gear slider, a planetary gear set, a valve shaft, the valve seat assembly is fixedly connected or limitingly connected with the valve shaft, the valve seat assembly is provided with a positioning groove, the valve seat assembly is fixedly connected with a sleeve part, the planetary gear set comprises at least one planetary gear, the planetary gear comprises a large-diameter gear and a small-diameter gear; the gear slider comprises a slider gear part, the slider gear part is engaged with the small-diameter gear; the fixed gear comprises a fixed gear body and a fixed gear support, the fixed gear support is made of metal material, the fixed gear support comprises a support positioning part, the support positioning part is matched with the positioning groove part to realize circumferential limiting, and the fixed gear support is welded and fixed with the valve seat assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration control, in particular to an electric valve. BACKGROUND

[0002] Refrigeration and freezing equipment such as refrigerators are widely used in various occasions. For example, the temperature zones of a refrigerator are controlled within a certain interval of the preset temperature, i.e. intermittent refrigeration. When the actual temperature of a temperature zone is higher than the preset temperature, the compressor is started to carry out refrigeration so that the temperature of the temperature zone reaches the preset temperature. Each time the compressor is stopped and restarted, a large starting power consumption is generated. Moreover, during the initial stage of each start, high-temperature refrigerant first enters the evaporator to increase the temperature, and refrigeration is carried out only after the conditions of the refrigeration cycle are reached. The throttling is realized by using a capillary tube. SUMMARY

[0003] An object of one embodiment of the present application is to provide an electric valve that uses an electromagnetic coil to drive a planetary gear reduction device to rotate a gear slider to adjust the flow of refrigerant, and that allows the fixed gear and the valve shaft to have good concentricity relative to each other. To this end, the present application uses the following technical solution:

[0004] An electric valve includes a valve body, the valve body including a valve seat assembly, a fixed gear, a gear slider, a planetary gear set, and a valve shaft; the valve seat assembly is fixedly connected or limitingly connected to the valve shaft, the valve seat assembly is provided with a positioning groove, the valve seat assembly is fixedly connected to a sleeve part, the planetary gear set includes at least one planetary gear, the planetary gear includes a large-diameter gear and a small-diameter gear; the gear slider includes a slider gear part, the slider gear part is engaged with the small-diameter gear; the fixed gear includes a fixed gear body and a fixed gear support, the fixed gear support is made of a metal material, the fixed gear support includes a support positioning part, the support positioning part cooperates with the positioning groove part to realize circumferential limiting, and the fixed gear support is welded to the valve seat assembly.

[0005] The electric valve provided by one embodiment of the present application has the fixed gear including a fixed gear support and a fixed gear body. After the fixed gear support cooperates with the valve seat assembly through the support positioning part, the valve shaft and the fixed gear support are positioned using a tool, and then welding is carried out, so that the fixed gear and the valve shaft can have good concentricity relative to each other. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 The figure is a cross-sectional view of one embodiment of the present application;

[0007] Figure 2 The figure is a cross-sectional view of the structure of the valve seat assembly provided by one embodiment of the present application;

[0008] Figure 3 An exploded view of the valve seat assembly according to an embodiment of the present application;

[0009] Figure 4 A top view of the valve seat assembly according to an embodiment of the present application;

[0010] Figure 5 A schematic view of the fixed gear structure according to the first embodiment of the present application;

[0011] Figure 6 A schematic view of the front view of the gear slider according to the first embodiment of the present application;

[0012] Figure 7 A schematic view of the back view of the gear slider according to the first embodiment of the present application;

[0013] Figure 8 A schematic view of the structure of the planetary gear set according to the first embodiment of the present application;

[0014] Figure 9 A schematic view of the positional relationship between the gear slider and the valve seat assembly when the electric valve is in a full-off state;

[0015] Figure 10 A schematic view of the positional relationship between the gear slider and the valve seat assembly when the electric valve is in an intermediate state of flow rate adjustment;

[0016] Figure 11 A schematic view of the positional relationship between the gear slider and the valve seat assembly when the electric valve is in a full-on state of flow rate;

[0017] Figure 12 A schematic view of the structure of the third plate body portion 113 according to the first embodiment of the present application;

[0018] Figure 13 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application;

[0019] Figure 14 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application; Figure 13 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application;

[0020] Figure 15 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application;

[0021] Figure 16 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application; Figure 15 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application;

[0022] Figure 17 A schematic view of the sectional view of another embodiment of the valve seat assembly according to the present application;

[0023] Figure 18Structure schematic diagram of another embodiment of the present application;

[0024] Figure 19 is Figure 18 Structure schematic diagram of the fixed gear support in the embodiment;

[0025] Figure 20 is Figure 18 Cooperation process schematic diagram of the fixed gear and the valve seat assembly in the embodiment;

[0026] Figure 21 is Figure 18 Sectional view schematic diagram of the fixed gear and the valve seat assembly after assembly in the embodiment.

CONCRETE EMBODIMENT

[0027] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0028] Please refer to Figure 1 , Figure 1 is a sectional view schematic diagram of an embodiment of the present application. As shown in Figure 1 , the electric valve provided by the embodiment includes a valve body 1 and a stator coil (not shown in the figure). The valve body 1 includes a valve seat assembly 11, a rotor 12, and a valve shaft 14. The stator coil of the electric valve is connected to a driving controller. After the driving controller is powered on, it will send a pulse driving signal to the stator coil, and the stator coil generates a periodically changing magnetic field, thereby driving the rotor 12 of the electric valve to rotate in a forward direction or a reverse direction.

[0029] The rotor 12 is fixedly connected with a sun gear 13, so that when the rotor 12 rotates, the sun gear 13 can be driven to rotate synchronously. In the embodiment, the rotor 12 is fixedly connected with the sun gear 13, of course, it can also be set as a limit connection, as long as the rotor 12 can drive the sun gear 13 to rotate together. The sun gear 13 is provided with a through hole 131 passing through the center thereof, the valve shaft 14 is arranged in the through hole 131, and the sun gear 13 can rotate around the valve shaft 14 freely. One end of the valve shaft 14 is fixedly connected with the valve seat assembly 11, and the other end is fixedly connected with a shaft sleeve arranged at the top of the valve body or directly with the shell, so that the valve shaft 14 can provide good concentricity for the rotation of the rotor 12 and the sun gear 13.

[0030] The electric valve comprises a sleeve component, in the embodiment, the sleeve component comprises a first sleeve component 151 and a second sleeve component 152, the first sleeve component 151 is generally in the shape of a sleeve with one end open, can be made of stainless steel material, has a first top wall part 1511 and a first side wall part 1512, the second sleeve component 152 is generally in the shape of a sleeve with both ends open, can also be made of stainless steel material, has a second top wall part 1521 and a second side wall part 1522. The diameter of the second side wall part of the second sleeve component is larger than the diameter of the first side wall part of the first sleeve component, so that the lower end part of the first sleeve component 151 is fixed with the top wall part of the second sleeve component 152, such as fixed by welding. The lower end edge part of the second side wall part 1522 of the second sleeve component 152 is fixedly connected with the valve seat assembly 11, such as fixedly connected by welding. Of course, the second sleeve component 152 can be fixedly connected with the valve seat assembly 11 by other means, such as fixedly connected by screwing, and the first sleeve component 151 can be fixedly connected with the second sleeve component 152 by other means, such as fixedly connected by screwing. The first sleeve component 151 and the second sleeve component 152 are fixedly connected with each other, and the first sleeve component 151 and the second sleeve component 152 are fixedly connected with the valve seat assembly 11, so that the sleeve component is formed. Figure 1 As a specific embodiment, a specific structure and connection method of the first sleeve component and the second sleeve component are shown, and those skilled in the art can also make certain changes, such as, the second sleeve component does not have the second top wall part 1521, but is an equal-diameter sleeve with both ends open, and a bottom wall part extending radially outward is arranged at the bottom of the first sleeve component, and then fixedly connected with the second sleeve component, which can also achieve the above connection relationship. Or, the first sleeve component and the second sleeve component are no longer distinguished, but are made into an integrally formed sleeve component, such as once punched into a metal plate to form the first side wall part 1512, the second side wall part 1522, the first top wall part 1511, and the second top wall part 1521, which can also achieve the purpose of the present application. The embodiment adopts the connection method of the first sleeve component and the second sleeve component, which is only a specific implementation method and cannot be understood as a limitation on the protection scope.

[0031] A protruding part 1511a is arranged at the center of the top wall part 1511 of the first sleeve component, which protrudes outward, so that a recess is formed inside the top wall part 1511. One end of the shaft sleeve 16 is limited or fixedly connected with the valve shaft 14, and the other end of the shaft sleeve 16 is matched with the protruding part 1511a, such as fixedly connected by welding. Figure 1As shown, the upper end of the shaft sleeve 16 is located in the recess formed by the protrusion 1511a to ensure that the axis of the valve shaft is substantially coincident with the central axis of the valve body. A spring 17 is provided between the shaft sleeve 16 and the sun gear 13, that is, one end of the spring 17 abuts the shaft sleeve 16, and the other end of the spring 17 abuts the sun gear 13. The spring 17 can provide a certain pre-tightening force to the sun gear 13 to constrain the sun gear 13 from excessive displacement upward. It should be noted that in the present embodiment, the connection mode of the sun gear 13 and the rotor 12 is such that the lower end of the spring abuts the sun gear. However, since the sun gear and the rotor can be regarded as a component, there are various combinations in structure, and therefore, the lower end of the spring can also be arranged to abut the rotor.

[0032] In the valve cavity substantially surrounded by the first sleeve member, the second sleeve member, and the valve seat assembly, a planetary gear assembly 18, a fixed gear 19, and a valve block gear 20 are further provided. The main working principle is that the rotation of the rotor and the sun gear drives the planetary gear of the planetary gear assembly to rotate, and the planetary gear drives the valve block gear to rotate at the same time to change the position of the valve block gear relative to the valve seat assembly, thereby achieving the purpose of controlling the flow. The structure and connection or cooperation relationship of the valve seat assembly, the planetary gear assembly, the fixed gear, and the valve block gear will be introduced below.

[0033] Please refer to Figure 2 , Figure 3 , Figure 4 , wherein Figure 2 is a structure cross-sectional view of the valve seat assembly provided in the present embodiment, Figure 3 is an exploded view of the valve seat assembly provided in the present embodiment, Figure 4 is a top view of the valve seat assembly provided in the present embodiment. The valve seat assembly 11 provided in the present embodiment includes a first plate body part 111, a second plate body part 112, a third plate body part 113, a first connecting pipe 114, a second connecting pipe 115, and a columnar part 116. The first plate body part 111, the second plate body part 112, and the third plate body part 113 are arranged in sequence from bottom to top along the axial direction. The first plate body part 111, the second plate body part 112, the third plate body part 113, the first connecting pipe 114, and the second connecting pipe 115 are fixedly assembled. The first connecting pipe 114 and the second connecting pipe 115 respectively serve as inflow or outflow channels of the fluid medium of the electric valve, and are generally used for connecting with the system pipeline in the refrigeration or heating system such as a refrigerator, a freezer, or an air conditioner. In the valve seat assembly 11, the third plate body part 113 is located at the uppermost position, and the third plate body part 113 and the first plate body part 111 are fixedly connected to the upper and lower surfaces of the second plate body part 112, respectively.

[0034] The first plate body part 111 is generally in a plate structure, has a first hole part 1111 arranged at the central position, in the embodiment, the first hole part 1111 is in a blind hole structure, that is, not penetrating the first plate body part 111, after assembly, the valve shaft 14 is inserted into the first hole part 1111 to be fixed. On both sides of the central position, a first connecting pipe mounting part 1112 and a second connecting pipe mounting part 1113 are further arranged, the first connecting pipe mounting part 1112 and the second connecting pipe mounting part 1113 are both through holes penetrating the upper and lower surfaces of the first plate body part 111, the first connecting pipe 114 is fixedly connected with the first plate body part 111 through the first connecting pipe mounting part 1112, the second connecting pipe 115 is fixedly connected with the first plate body part 111 through the second connecting pipe mounting part 1113, since the second plate body part 112 is arranged above the first plate body part 111 and the two are closely attached, therefore, when the first connecting pipe and the second connecting pipe are installed, the second plate body part can play a positioning role, that is, after the first connecting pipe 114 is inserted into the first connecting pipe mounting part 1112, abutment with the second plate body part 112 is realized, so as to ensure the insertion depth. The outer edge of the first plate body part is provided with a first step part 1114, during assembly, the second sleeve part 1522 can be positioned and matched with the first step part 1114 in abutment, and specific fixed connection can be achieved through welding.

[0035] The second plate body part 112 is generally in a plate structure, and has a second hole part 1124 arranged at a central position, the second hole part 1124 is a through hole penetrating the second plate body part 112, and after assembly, the second hole part 1124 is generally coaxially arranged with the first hole part 1111, and the valve shaft is inserted into the second hole part 1124 and then inserted into the first hole part 1111 to be fixed. On both sides of the central position of the second plate body part 112, a first flow guide groove part 1122 and a second flow guide groove part 1123 are further arranged, the first flow guide groove part 1122 guides the outlet flow of the throttled fluid in this embodiment, and the second flow guide groove part 1123 guides the fluid flowing into the electric valve, that is, after the fluid flows from the second connecting pipe 115, it enters the valve cavity through the cavity formed by the second flow guide groove part 1123, and after throttling (the specific throttling process is described below), it enters the first connecting pipe 114 through the cavity formed by the first flow guide groove part 1122, and then flows out of the electric valve. The first flow guide groove part 1122 and the first connecting pipe mounting part 1112 of the first plate-shaped part 111 have an intersection in the axial projection, so that the fluid can flow from the cavity formed by the first flow guide groove part 1122 to the first connecting pipe 114; at the same time, the second flow guide groove part 1123 and the second connecting pipe mounting part 1113 of the first plate-shaped part 111 have an intersection in the axial projection, so that the fluid can flow from the second connecting pipe into the cavity formed by the second flow guide groove part 1123. Among them, the first flow guide groove part 1122 is a hole structure and penetrates the second plate body part 112, and when the first plate body part 111, the second plate body part 112 and the third plate body part 113 are assembled, the fluid in the cavity formed by the first flow guide groove part 1122 cannot flow out of the second plate body part along the radial direction of the second plate body part 112. The second flow guide groove part 1123 is a slot structure penetrating the second plate body part, and the upper end surface of the second flow guide groove part 1123 is covered by the third plate-shaped part 113, so that the fluid flowing from the second connecting pipe 115 can only flow into the valve cavity of the electric valve along the radial direction of the second plate body part 112 (i.e. the extension direction of the second flow guide groove part 1123).

[0036] The outer diameter of the second plate body part 112 is smaller than the outer diameter of the first plate body part 111, so that a second step part 1118 is formed at the edge of the two, and the fixed gear 19 described below is installed on the valve seat assembly 11 through the second step part 1118. At the same time, the outer edge of the second plate body part 112 is provided with a positioning groove part 1121, and the inner wall of the fixed gear 19 is provided with a protruding part 1921, which is matched with the positioning groove part 1121, so as to realize the circumferential positioning of the fixed gear 19 and the second plate body part 112, that is, the fixed gear 19 cannot rotate relative to the second plate body part 112.

[0037] The third plate body part 113 is generally in a plate structure, and is arranged on the second plate body part 112, and has a third flow guide groove part 1132 arranged at a central position. Figure 3The top of the third plate body part 113 is a mating surface 1134, and the bottom surface of the valve block gear can be in contact with the mating surface 1134. The third plate body part 113 has a third hole part 1133 arranged at the center, which is a through hole penetrating the third plate body part 113. After assembly, the third hole part 1133 is coaxially arranged with the first hole part 1111 and the second hole part 1124, and the valve shaft 14 is sequentially inserted into the third hole part 1133, the second hole part 1124, and the first hole part 1111 and then fixed. The third plate body part 113 is provided with a flow regulating part 1131 and a valve port part 1132. The flow regulating part 1131 is arranged on the mating surface 1134 of the third plate body part 113 and is recessed inwardly, forming a groove-shaped structure that does not penetrate the third plate body part. At one end of the groove, the valve port part 1132 is connected, which forms a flow-through hole penetrating the third plate body part. Fluid can flow along the flow regulating part 1131 and flow out of the flow-through hole of the valve port part 1132. The specific structure of the flow regulating part 1131 will be described below.

[0038] For the fixed connection of the first plate body part 111 and the second plate body part 112, various methods can be used, for example, the first plate body part 111 and the second plate body part 112 are welded, or the first plate body part 111 and the second plate body part 112 are bonded with glue.

[0039] When the first plate body part 111 and the second plate body part 112 are fixedly connected by welding, a solder accommodating part 1125 can be arranged on the second plate body part 112. Specifically, the solder accommodating part 1125 is a through hole penetrating the second plate body part 112. Please refer to Figure 3 In this embodiment, the number of solder accommodating parts 1123 is 2. When the first plate body part 111 and the second plate body part 112 are welded, the first plate body part 111 and the second plate body part 112 can be fixed by a fixture first, and then the solder is placed in the solder accommodating part 1125. At this time, the solder is supported on the upper surface of the first plate body part 111, and then the first plate body part 111 and the second plate body part 112 are fixedly connected by furnace welding or the like. At this time, the solder can spread between the first plate body part 111 and the second plate body part 112 through the edges of the solder accommodating part 1125, so that the solder between the first plate body part 111 and the second plate body part 112 is more uniform, and the area filled with solder between the first plate body part 111 and the second plate body part 112 is less.

[0040] Of course, the solder receiving portion 1125 is not limited to the form of a through hole formed in the second plate body portion 112, and for example, the solder receiving portion 1125 can be in the form of a notch formed in the periphery of the second plate body portion 112, in which case, the solder between the first plate body portion 111 and the second plate body portion 112 can also be made more uniform and the area in which the solder does not fill between the first plate body portion 111 and the second plate body portion 112 can be made less.

[0041] The valve seat assembly 11 provided by the present embodiment can be manufactured separately and then fixedly connected, which can relatively reduce the processing difficulty and processing cost of the valve seat assembly 11.

[0042] The manner of fixedly connecting the third plate body portion 113 and the second plate body portion 112 can also be in various forms, for example, the third plate body portion 113 and the second plate body portion 112 can be fixedly connected by welding, or the third plate body portion 113 and the second plate body portion 112 can be fixedly connected by adhesive.

[0043] In order to ensure that the first plate body portion 111, the second plate body portion 112, and the third plate body portion 113 maintain a fixed relative position in the axial direction, for example, to make the first pipe mounting portion 1112 and the first flow guide groove portion 1122 and the valve port portion 1132 substantially maintain the same axis, a first positioning portion 1115 can be provided in the first plate-shaped portion 111, a second positioning portion 1126 can be provided in the second plate-shaped portion 111, and a third positioning portion 1135 can be provided in the third plate-shaped portion 113. Specifically, the first positioning portion 1115 and the second positioning portion 1126 are generally in the form of a through hole, and the third positioning portion 1135 is in the form of a notch, the columnar portion 116 penetrates the third positioning portion 1135, passes through the second positioning portion 1126 and the first positioning portion 1115 in sequence, and extends out of the lower end surface of the first plate body portion 111, and more specifically, the columnar portion 116 can be fixedly connected to the first plate body portion 111, the second plate body portion 112, and the third plate body portion 113 by welding. The columnar portion 116 serves as a positioning component, and the portion of the columnar portion 116 extending out of the first plate body portion 111 can also serve as a fixing component of the electromagnetic coil.

[0044] The first plate body portion 111, the second plate body portion 112, the third plate body portion 113, the first pipe 114, the second pipe 115, and the columnar portion are fixedly connected to form a valve seat assembly.

[0045] Please refer to Figure 5 , Figure 5is a schematic view of a fixed gear structure provided by the first embodiment of the present application. The fixed gear 19 is generally cylindrical and has a large-diameter portion 191 and a small-diameter portion 192, wherein the height of the large-diameter portion 191 in the axial direction is lower than the height of the small-diameter portion 192 in the axial direction, so that a step portion 193 is formed between the large-diameter portion 191 and the small-diameter portion 192, and the step portion 193 is formed by a bottom wall of the large-diameter portion 191 and an inner peripheral wall of the small-diameter portion 192. The large-diameter portion 191 has a fixed gear top wall portion 1911 and a fixed gear portion 1912, wherein the fixed gear top wall portion 1911 is abutted by the second top wall portion 1521 of the sleeve member after assembly to limit the fixed gear in the axial direction. The fixed gear portion 1912 is used to engage with the planetary gear 18 described below.

[0046] The inner peripheral wall of the small-diameter portion 192 is further provided with a protrusion portion 1921, which is strip-shaped and extends along the axial direction of the fixed gear to the bottom wall portion of the small-diameter portion 192. Of course, in actual processing, the protrusion portion 1921 can also not be flush with the bottom wall of the small-diameter portion 192, for example, the end of the protrusion portion 1921 is spaced apart from the bottom wall of the small-diameter portion 192 by a certain distance, but at least ensures that the end of the protrusion portion 1921 is not higher than the top surface of the second plate body portion 112 after assembly. As described above, the outer edge portion of the second plate body portion 112 is provided with a positioning groove 1121, so that during assembly, the bottom wall 193 of the fixed gear 19 is abutted by the first plate body portion 111, and the protrusion portion 1921 is clamped into the positioning groove 1121, so that the fixed gear 19 is positioned in the circumferential direction, i.e. the fixed gear 19 cannot rotate relative to the second plate body portion 112.

[0047] In order to further ensure that the fixed gear 19 is abutted by the sleeve assembly when reducing the influence on the fixed gear portion 1912, the fixed gear 19 can further be provided with a pressing portion 194 on the outer edge of the top wall portion 1911, the height of the pressing portion 194 is higher than that of the top wall portion 1911, and the pressing portion 194 is generally annular. Therefore, when the fixed gear is abutted by the sleeve member, the second top wall portion 1521 will be abutted by the pressing portion 194, thereby limiting the fixed gear 19 in the axial direction. In order to prevent the sleeve member from deforming the fixed gear when abutting against the pressing portion 194 and affecting the engagement accuracy of the fixed gear portion 1912, a groove portion 195 can be provided on the side of the pressing portion 194 close to the central shaft. In the present embodiment, the cross-sectional shape of the groove portion 195 is triangular, so that even if the sleeve member exerts a relatively large force on the pressing portion 194 during assembly, it will not have a serious impact on the fixed gear portion 1912. Of course, the cross-sectional shape of the groove portion 195 is not limited to a triangle. Those skilled in the art can understand that all groove portions 195 having shapes that can relatively separate the pressing portion 194 from the fixed gear portion 1912 can be applied to the present embodiment.

[0048] The fixed gear 19 can be integrally injection molded by plastic, such as high molecular material. The fixed gear positioning structure provided by the embodiment is abutted at one end with the second plate body part 112, and the abutting part 194 at the other end is abutted with the second top wall part 1521 of the sleeve part to realize the circumferential and axial positioning of the fixed gear in the electric valve, and the assembly is relatively simple. The protruding part 1921 provided by the fixed gear can not only realize the circumferential positioning with the positioning groove 1121 of the second plate body part 112, but also control the rotation range of the gear slider 20.

[0049] Please refer to Figure 6 , Figure 7 , Figure 6 is a front view appearance schematic diagram of the gear slider provided by the first embodiment of the application, Figure 7 is a back view appearance schematic diagram of the gear slider provided by the first embodiment of the application. The gear slider 20 is generally in the shape of a bottomed cylinder, including a body part 201 and a positioning part 202 protruding from the outer edge part of the body part 201. The cross section of the positioning part 202 is generally in the shape of a fan ring, and is coaxially arranged with the body part 201, that is, the outer diameter of the positioning part 202 is greater than the outer diameter of the body part 201, so that the positioning part 202 forms two end parts, i.e., a first positioning part 2021 and a second positioning part 2022. The gear slider 20 further includes a through hole part 204 arranged at the center position thereof. The valve shaft 14 is fixedly connected with the valve seat assembly after passing through the through hole formed by the through hole part 204, and thus the gear slider 20 can rotate around the valve shaft 14. After assembly, the gear slider 20 is coaxially arranged with the fixed gear 19, and the distance between the circumferential wall of the positioning part 202 and the center axis matches the distance between the protruding part 1921 of the fixed gear and the center axis, that is, when the gear slider 20 rotates to the limit position in the clockwise direction shown in the figure, the first positioning part 2021 abuts against one side of the protruding part 1921, so that the gear slider cannot continue to rotate; when the gear slider 20 rotates to the limit position in the counterclockwise direction shown in the figure, the second positioning part 2022 abuts against the other side of the protruding part 1921, so that the gear slider cannot continue to rotate. In this way, the rotation stroke of the gear slider is determined by the cooperation of the positioning part 202 and the protruding part 1921. It should be noted that the length of the positioning part 202 (i.e., the length along the circumferential direction of the gear slider) can be adjusted according to the needs of the system.

[0050] The inner circumferential wall of the gear slider 20 is provided with a slider gear part 203, which can be engaged with the planetary gear assembly described below, And and rotates under the drive of the planetary gear. The bottom of the gear slider 20 is provided with a flow control part 205, which has a certain height as a whole, Figure 7As shown, the flow control portion 205 extends along the axial direction of the gear slider 20 on the bottom surface thereof to a certain height, and forms a fitting surface 2051 for fitting with and relatively rotating with the fitting surface 1134 of the third plate portion 113. Meanwhile, a notch portion 2052 is provided at a position of the flow control portion 205, so that when the gear slider 20 is fitted with the third plate portion 113, the flow control portion 205 at the position of the notch portion 2052 is not in contact with the third plate portion 113, and fluid can flow in or out from the space formed by the notch portion 2052.

[0051] Please refer to Figure 8 , Figure 8 is a structural diagram of the planetary gear set provided by the first embodiment. The planetary gear set 18 includes a planet carrier 181 and a cover plate 182. The planet carrier 181 includes a bottom portion 1812 and three support columns 1811 extending upward from the bottom portion 1812. It should be noted that the first embodiment illustrates a structure of three planetary gears, and in fact, the structure of the planetary gears can be set according to the need of the output torque, and is not limited to three planetary gears. Therefore, in the first embodiment, the number of the support columns 1811 is also three, and they are uniformly distributed in the circumferential direction. Three planetary gears 183 are arranged between two adjacent support columns 1811. The planet carrier 181 and the cover plate 182 are fixedly connected, and axially limit the planetary gears 183. Specifically, a small hole can be provided on the cover plate 182, and the end portion 18111 of the support column 1811 is deformed by pressure after extending out of the small hole, so as to realize the fixed connection. The planet carrier 181 can be formed by plastic injection molding, and the cover plate 182 can be formed by stamping a metal plate. In this way, the end portion 18111 can be deformed by heating, so that the cover plate will not be separated from the planet carrier. The three planetary gears 183 are fixed on the planet carrier by planetary gear shafts 184, and the planetary gears 183 can rotate around the planetary gear shafts 184. One end of the planetary gear shaft 184 is fixedly connected or limitedly abuts against the bottom portion 1812 of the planet carrier, and the other end is fixedly connected or abuts against the cover plate 182.

[0052] The planetary gear 183 comprises two stages of gears, i.e. a large-diameter gear 1831 at the relatively upper end and a small-diameter gear 1832 at the relatively lower end. In assembly, the sun gear 13 is inserted downward from the center axis of the planetary gear set 18 and engaged with the large-diameter gear 1831 to drive the planetary gear 183 to rotate. The three planetary gears 183 enclose a virtual circle, the inner side of the large-diameter gear 1831 is engaged with the sun gear 13, and the outer side of the large-diameter gear 1831 is engaged with the fixed gear portion 1912 of the fixed gear 19. In this way, when the sun gear 13 rotates, the planetary gear 183 rotates while rotating around the planetary gear shaft 184 and rotating along the fixed gear portion 1912 of the fixed gear. The small-diameter gear 1832 is engaged with the slider gear portion 203 of the gear slider 20 to drive the gear slider 20 to rotate. The rotation of the gear slider is stopped by the abutment of the first positioning portion 2021 and the second positioning portion 2022 with the protruding portion 1921 of the fixed gear, respectively. In this way, the electric valve is driven to rotate by the energization of the electromagnetic coil, the rotation of the rotor and the sun gear 13, the reduction of the planetary gear set, and the rotation of the gear slider 20. The flow control portion 205 at the bottom of the gear slider is in contact with the mating surface 1134 of the third plate body portion 113, the notch portion 2052 of the flow control portion is in correspondence with different parts of the flow adjusting portion 1131 of the third plate body portion, so as to realize the flow adjusting function.

[0053] The process of flow adjustment will be described below in combination with Figures 9-11 The position relationship between the gear slider and the valve seat assembly when the electric valve is in the full-closed state is shown in Figure 9 The position relationship between the gear slider and the valve seat assembly when the electric valve is in the intermediate state of flow adjustment is shown in Figure 10 The position relationship between the gear slider and the valve seat assembly when the electric valve is in the full-open state is shown in Figure 11 As shown in

[0054] The first positioning portion 2021 of the gear slider 20 is in abutment with one side of the protruding portion 1921 of the fixed gear. In the projection view shown in Figure 9 The notch portion 2052 of the flow control portion 2051 is in axial projection and has no overlapping part with the flow adjusting portion 1131 and the valve port portion 1132, i.e. the flow adjusting portion 1131 and the valve port portion 1132 are covered by the flow control portion 2051, and the fluid cannot flow into the flow adjusting portion 1131. At this time, the electric valve is in the full-closed state. Figure 9 As shown in

[0055] The notch portion 2052 of the flow control portion 2051 is in axial projection and has no overlapping part with the flow adjusting portion 1131 and the valve port portion 1132, i.e. the flow adjusting portion 1131 and the valve port portion 1132 are covered by the flow control portion 2051, and the fluid cannot flow into the flow adjusting portion 1131. At this time, the electric valve is in the full-closed state. Figure 10As shown, after the gear slider 20 rotates counterclockwise by a certain angle, the axial projection of the flow control unit 2051 partially overlaps with the flow regulating unit 1131, i.e., region A in the figure. Region A is a part of the flow regulating unit 1131. At this time, the fluid in the valve chamber of the electric valve can flow in from the space formed by the notch 2052, and flow into the arc-shaped groove formed by the flow regulating unit 1131 through region A, and then flow out from the valve port 1132. At this time, the cross-sectional area of ​​region A (shaded part in the figure) determines the throttling flow rate of the electric valve. Those skilled in the art will understand that... Figure 10 The image shows a specific position of the gear slider. As the gear slider 20 rotates continuously, the cross-sectional area of ​​the corresponding region A increases. This process is the flow regulation process of the electric valve.

[0056] like Figure 11 As shown, when the gear slider 20 rotates counterclockwise until the second positioning part 2022 abuts against the other side of the protrusion 1921 of the fixed gear, it stops rotating. At this time, the axial projection of the notch 2052 overlaps with the portion of the flow regulating part near the valve port and the valve port itself. That is, the valve port 1132 is entirely located at the position of the notch 2052. At this time, the fluid in the electric valve chamber flows in through the space formed by the notch 2052 and flows out through the valve port 1132. Figure 11 As shown in area A, the electric valve is in the fully open state at this time.

[0057] The following is combined Figure 12 The structure of the flow regulating part 1131 and the valve port part 1132 provided in the third plate body 113 will be described. Figure 12This is a structural schematic diagram of the third plate portion 113. The third plate portion 113 is generally flat, with a third positioning portion 1135 provided at its circumferential edge for cooperating with the columnar portion 116 to achieve longitudinal positioning between the first plate portion, the second plate portion, and the third plate portion. A third hole portion 1133 is provided at the center of the third plate portion 113 for assembly with the valve shaft 14. The valve port portion 1132 forms a flow hole penetrating the third plate portion, and a valve port outline line 1132a is formed on the mating surface 1134. The diameter φ of the valve port portion 1132 is in the range of 1.2mm < φ < 2mm. On one side of the valve port portion 1132, an inwardly recessed flow regulating portion 1131 is formed on the mating surface 1134. The flow regulating portion 1131 is generally in the shape of a narrow arcuate groove, and the edge line of the flow regulating portion 1131 is defined by the first curve 1131a and the second curve 1131b. The first curve 1131a can be an Archimedean spiral or a circular arc. One end of the first curve 1131a intersects the valve port profile 1132a on the mating surface 1134 of the valve port portion 1132 at point B. The second curve 1131b can also be an Archimedean spiral. One end of the second curve 1131b intersects the valve port profile 1132a at point C. Thus, the distance between the first curve 1131a and the second curve 1131b gradually increases towards the valve port portion 1132. At the end near the valve port portion 1132, the distance L1 between the first curve 1131a and the second curve 1131b satisfies: 0.5mm < L1 < 1mm. At the other end away from the valve port portion 1132, the distance L2 between the first curve 1131a and the second curve 1131b satisfies: 0.05mm < L2 < 0.15mm. This end can be rounded, such as... Figure 12 As shown in the diagram, at the left end, the first curve 1131a and the second curve 1131b are connected by the third curve 1131c. The third curve 1131c can be an arc, and its radius R satisfies the condition: 0.1mm < R < 0.3mm. This results in a smaller overall size for the flow regulating unit 1131, making it particularly suitable for precise regulation of small flow rates compared to flow regulating valves that typically use needle valve structures, such as refrigerant flow regulation in refrigerator refrigeration systems.

[0058] Furthermore, the depth of the flow regulating section 1131 can be set so that the depth of the flow regulating section 1131 near the end of the third curve 1131c gradually increases along the extension direction of the flow regulating section 1131. As a specific embodiment, at the end near the valve port 1132, the depth H1 of the flow regulating section 1131 satisfies: 0.3mm < H1 < 0.7mm, and at the end near the third curve 1131c, the depth H2 of the flow regulating section 1131 satisfies: 0.05mm < H2 < 0.15mm.

[0059] In actual operation, the width and depth of the flow adjustment unit 1131 can be set according to the system flow requirements to meet different needs.

[0060] The assembly process of the electric valve is described below. First, the valve seat assembly can be assembled and fixed as a single unit. Specifically, the first plate portion 111, the second plate portion 112, the third plate portion 113, the first connecting pipe 114, the second connecting pipe 115, and the columnar portion 116 are assembled sequentially and fixed by welding. The valve shaft 14 can be fixedly connected to the valve seat assembly by welding or by press-fitting. Next, the gear slider is installed. Specifically, the through-hole portion 204 of the gear slider is inserted along the valve shaft 14, so that the contact surface 2051 of the gear slider is in contact with the mating surface 1134 of the third plate portion. Then, the planetary gear set 18 is partially installed into the gear slider 20, and the small diameter gear 1832 of the planetary gear set 18 meshes with the slider gear portion 203, while the large diameter gear 1831 is located above the gear slider 20. Then, the fixed gear 19 is inserted from above, so that the protrusion 1921 of the fixed gear engages with the positioning groove 1121 of the second plate, thereby positioning the fixed gear in the circumferential direction and meshing the fixed gear portion 1912 with the outer side of the large diameter tooth 1831 of the planetary gear set. Next, the rotor 12 with the sun gear 13, the spring 17, and the bushing 16 are installed; then, the sleeve assembly is installed. It should be noted that the sleeve assembly here can be assembled by welding a first sleeve assembly and a second sleeve assembly separately, as described in the first embodiment, or it can be integrally stamped. The sleeve assembly has a first side wall portion 1512, a second side wall portion 1522, a first top wall portion 1511, and a second top wall portion 1521. After assembly, the second top wall portion 1521 is press-fitted with the upper edge of the fixed gear 19 to axially position the fixed gear, and the sleeve assembly is welded and fixed to the valve seat assembly.

[0061] The following is combined Figure 13 , Figure 14 This describes another embodiment of the valve seat assembly, a structure that facilitates welding the valve seat assembly to the sleeve component. Wherein, Figure 13 This is a cross-sectional schematic diagram of another embodiment of the valve seat assembly of the present invention. Figure 14 yes Figure 13 A three-dimensional schematic diagram of the first plate body.

[0062] As described in the first embodiment, the first plate body part 111 and the second plate body part 112 can be fixed by welding or by using glue. When the first plate body part 111 and the second plate body part 112 are fixed by welding, a solder accommodating cavity is provided in the second plate body part, the first plate body part 111 and the second plate body part 112 are fixed by a fixture, solder is placed in the solder accommodating cavity, and the solder is melted by furnace welding. At this time, the solder spreads outwards from the solder accommodating cavity along the joint surface between the first plate body part 111 and the second plate body part 112 to achieve the purpose of welding. However, the joint surface between the first plate body part 111 and the second plate body part 112 is relatively large, and a relatively large amount of solder is required to achieve stable welding quality. However, if too much solder is placed, excess solder may spill out of the joint surface between the first plate body part 111 and the second plate body part 112 and flow to the joint between the sleeve part and the first plate body part 111 during furnace welding. The sleeve part and the first plate body part can be made of the same stainless steel material and are welded by laser welding to achieve the purpose of sealing and fixing. If solder is present between the sleeve part and the first plate body part, cracks may occur at the solder during laser welding, which may result in poor sealing of the electric valve and potential leakage.

[0063] To solve this problem, the structure of the first plate body part 111 can be improved, as shown in Figure 14 In this embodiment, an annular groove-shaped part 1116 is provided on the side of the first plate body part 111 facing the second plate body part 112, and the groove-shaped part 1116 is at least partially covered by the second plate body part 112. Specifically, except for the part corresponding to the second flow guide groove 1123 of the second plate body part 112, the rest of the groove-shaped part 1116 is covered by the second plate body part 112. That is, a substantially annular space for solder to flow into is formed between the annular groove-shaped part 1116 and the second plate body part 112. In this way, during furnace welding, the solder melts and spreads outwards from the solder accommodating cavity, flows along the joint between the first plate body part 111 and the second plate body part 112, and flows into the substantially annular space formed by the groove-shaped part 1116, so that the solder no longer continues to spill out of the gap between the first plate body part 111 and the second plate body part 112 to the part of the first plate body part 111 used for assembling with the sleeve part. This structure can effectively reduce the poor welding rate of the sleeve part and the valve seat assembly and improve the welding quality of the product. The cross-sectional shape of the groove-shaped part 1116 can be triangular, as shown in Figure 14 Of course, it can also be any other suitable shape. The present embodiment does not limit the specific structure, shape, and size of the groove-shaped part 1116.

[0064] Please refer to Figure 15 , Figure 16 , wherein,Figure 15 is a sectional view of another embodiment of the valve seat assembly of the present application, Figure 16 is Figure 15 is a perspective view of the second plate body portion in the

[0065] As another alternative embodiment, the second plate body portion 112 can be modified accordingly without changing the first plate body portion 111 as described in the first embodiment. In this embodiment, an annular groove portion 1127 is provided on the side of the second plate body portion 112 facing the first plate body portion 111, and the groove portion 1127 abuts against the first plate body portion 111 at least in most part. Specifically, the groove portion 1127 abuts against the first plate body portion 111 except for the portion corresponding to the second flow guide groove 1123 and the portion corresponding to the positioning groove portion 1121. That is, a substantially annular space for the solder to flow into is formed between the annular groove portion 1127 and the first plate body portion 111. In this way, during the furnace welding, after the solder is melted, it spreads out from the solder accommodating cavity, flows along the abutting portion between the first plate body portion 111 and the second plate body portion 112, and flows into the substantially annular space formed by the groove portion 1127, so that the solder no longer continues to overflow from the gap between the first plate body portion 111 and the second plate body portion 112 to the portion of the first plate body portion 111 used for assembling with the sleeve member. This structure also effectively reduces the poor welding rate of the sleeve member and the valve seat assembly, and improves the welding quality of the product. The cross-sectional shape of the groove portion 1127 can be triangular as shown in Figure 16 , and of course can be any other suitable shape for processing. The present embodiment does not limit the specific structure, shape, and size of the groove portion 1127.

[0066] Please refer to Figure 17 , Figure 17 is a sectional view of another embodiment of the valve seat assembly of the present application.

[0067] As another alternative implementation, in this embodiment, an annular third step portion 1117 is provided on the side of the first plate portion 111 facing the second plate portion, and at least a portion of the outer diameter of the third step portion 1117 is smaller than the outer diameter of the second plate portion 112, that is, from the perspective of axial projection, at least a portion of the projection of the third step portion 1117 lies within the projection of the second plate portion 112. Specifically, the third step portion 1117 forms an annular space along the circumferential direction between the first plate portion 111 and the second plate portion 112, which allows solder to flow in. Thus, during furnace soldering, after the solder melts, it diffuses outward from the solder receiving cavity and flows along the mating portion between the first plate portion 111 and the second plate portion 112, and partially flows into the aforementioned annular space. Since the flow and penetration of solder are typically formed by capillary action, the annular space formed by the third step portion 1117 and the second plate portion 112 is much larger than the air gap created by capillary action. Therefore, after the solder enters the annular space, it will not continue to overflow along the first plate portion 111 to the part of the first plate portion 111 used for assembly with the sleeve component. This structure can also relatively reduce the welding defect rate of the sleeve component and the valve seat assembly, and improve the welding quality of the product.

[0068] The following is combined Figures 18-21 This describes another implementation of the fixed gear and valve seat assembly. Please refer to... Figures 18-21 ,in, Figure 18 This is a schematic diagram of another embodiment of the present invention. Figure 19 yes Figure 18 Schematic diagram of the fixed gear bracket. Figure 20 This is a schematic diagram illustrating the engagement process between the fixed gear and the valve seat assembly. Figure 21 This is a cross-sectional view of the fixed gear and valve seat assembly after assembly.

[0069] The main difference between this embodiment and the first embodiment lies in the engagement method of the bushing 160, the fixed gear 9, and the valve seat assembly, as well as the structural differences between the rotor and the sun gear. The structures of other components such as the planetary gears and gear slides can be understood with reference to the first embodiment. To avoid excessive length, these components will not be described in detail again. Furthermore, for ease of understanding, the same reference numerals are used for components that are structurally or functionally similar to those in the first embodiment.

[0070] like Figure 18As shown, the electric valve provided by the embodiment includes a valve body 1 and a stator coil (not shown in the figure). The valve body 1 includes a valve seat assembly 11, a rotor 12 and a valve shaft 14. The stator coil of the electric valve is connected to a driving controller. After the driving controller is powered on, the driving controller sends a pulse driving signal to the stator coil, and the stator coil generates a periodically changing magnetic field, thereby driving the rotor 12 of the electric valve to rotate in a forward direction or a reverse direction. The rotor 12 is fixedly connected or limitingly connected with a sun gear 13. Specifically, one or more than one slot can be arranged in the central hole of the rotor, and correspondingly, a protruding rib is arranged on the upper end of the outer edge of the sun gear 13. Then, the sun gear 13 is assembled from below the rotor, so that the rib and the slot are matched to realize the relative positioning of the two in the circumferential direction, so that the sun gear 13 can rotate together with the rotor 12 under the driving of the rotor 12. The present embodiment gives a different combination mode of the rotor and the sun gear from the first embodiment. The sun gear is provided with a through hole 131 passing through the center thereof, and the valve shaft 14 passes through the through hole 131 and is fixedly connected with the valve seat assembly.

[0071] The sleeve member includes a first sleeve member 151 and a second sleeve member 152. The specific structures of the two can be referred to the description of the first embodiment. Of course, similar to the first embodiment, the sleeve member can adopt the combination of the first sleeve member and the second sleeve member 152, or can be stamped from a metal plate. Different from the first embodiment, the top wall part 1511 is in a substantially flat plate shape, and no protruding part 1511a is arranged. The shaft sleeve 160 has a pressing surface part 1601 which is matched with the inner wall of the top wall part 1511, and can realize planar abutment with the top wall part 1511. The shaft sleeve 160 is further provided with a valve shaft matching part 1602. Specifically, the valve shaft matching part 1602 is a hole arranged at the central axis position of the shaft sleeve 160, and the upper end of the valve shaft 14 is inserted into the hole to realize positioning. The shaft sleeve 160 is provided with a spring supporting part 1603 on the side close to the rotor. Specifically, the spring supporting part 1603 can be a step formed on the outer edge part of the end part of the shaft sleeve. One end of the spring 17 is in abutment with the spring supporting part 1603, and the other end is in abutment with the rotor 12.

[0072] The valve seat assembly 11 includes a first plate body part 111, a second plate body part 112 and a third plate body part 113. The specific structures of the three can be referred to the description of the first embodiment, which will not be described here. The outer edge part of the second plate body part 112 is provided with a positioning groove part 1121, which is used to realize matching positioning with a support positioning part 922 arranged on the fixed gear support to be described below.

[0073] The fixed gear 9 includes a fixed gear body 91 and a fixed gear support 92. As shown in the figure, the fixed gear support 92 is arranged on the outer edge part of the fixed gear body 91, and the fixed gear support 92 is provided with a support positioning part 922 which is used to realize matching positioning with the positioning groove part 1121 of the second plate body part 112 of the valve seat assembly 11. Figure 19As shown, the fixed gear bracket 92 comprises a bracket body 921 and a bracket positioning portion 922 extending downward from the bracket body 921. Specifically, the fixed gear bracket 92 is generally thin-walled and hollow cylindrical, and has a bracket upper end face 926 and a bracket lower end face 925, wherein the bracket lower end face 925 abuts the upper end face of the second plate body portion 112 after assembly, and the bracket positioning portion 922 extends outward from the bracket lower end face 925 and protrudes from the surface of the bracket lower end face 925, and is clamped into the positioning groove portion 1121 provided on the outer edge portion of the second plate body portion 112 to achieve the relative positional fixation of the fixed gear bracket 92 and the second plate body portion 112. The two can be fixedly connected by laser welding.

[0074] On the inner peripheral wall of the fixed gear bracket 92, a protrusion portion 924 is provided on the side close to the bracket positioning portion 922. In the present embodiment, the bracket positioning portion 922 is located in the extension direction of the protrusion portion 924, and of course the bracket positioning portion 922 can also be provided at another position of the bracket lower end face 925, not aligned with the protrusion portion 924. The protrusion portion 924 can be used to abut the first positioning portion 2021 and the second positioning portion 2022 of the gear slider to limit the rotation stroke of the gear slider.

[0075] The outer peripheral wall of the fixed gear bracket 92 can be a constant-diameter cylindrical shape, and the inner peripheral wall can be configured to have a large upper end inner diameter and a small lower end inner diameter, such as Figure 19 、 20 As shown, the inner peripheral wall of the fixed gear bracket is provided with a bracket step portion 923 above the protrusion portion 924, and the inner peripheral wall above the bracket step portion is defined as a first inner peripheral wall 929, and the inner peripheral wall below the bracket step portion is defined as a second inner peripheral wall 928. The inner diameter of the first inner peripheral wall 929 is larger than the inner diameter of the second inner peripheral wall 928. In this way, the fixed gear body 91 described below has an outer diameter matching the first inner peripheral wall 929, and after assembly, it can abut the bracket step portion 923 to achieve the relative positioning of the fixed gear body 91 and the fixed gear bracket 92 in the axial direction.

[0076] The fixed gear body 91 is generally annular, the outer diameter of which matches the inner diameter of the first inner peripheral wall 929, and the height of which can also match the height of the first inner peripheral wall 929, so that the lower end surface 914 of the fixed gear body 91 abuts against the bracket step portion 923 after assembly, and the upper end surface 913 of the fixed gear body can be substantially flush with the upper end surface 926 of the fixed gear bracket 92. In order to realize the relative positioning of the fixed gear body 91 and the fixed gear bracket 92 in the circumferential direction, a clamping groove portion 912 can also be provided on the outer edge of the fixed gear body, and a corresponding clamping portion 927 is provided on the first inner peripheral wall 929, that is, the clamping groove portion 912 is recessed inwardly with respect to the outer edge of the fixed gear body, and the clamping portion 927 is protruded outwardly with respect to the first inner peripheral wall 929, so that after assembly, the clamping groove portion 912 can be clamped with the clamping portion 927, thereby realizing the relative positioning of the fixed gear body and the fixed gear bracket in the circumferential direction. In the present embodiment, the number of the clamping groove portion 912 and the clamping portion 927 is two and symmetrically distributed, so that the fixed gear body 91 can be assembled with the fixed gear bracket smoothly without distinguishing the front and back surfaces during assembly. The inner edge of the fixed gear body is the fixed tooth 911, which is used to engage with the planetary gear set. Of course, the above-mentioned clamping groove portion 912 and clamping portion 927 are only disclosed as a specific embodiment, and various equivalent transformations of the matching structure of the clamping groove portion and the clamping portion can also be made, such as providing a recessed clamping groove portion on the first inner peripheral wall and a protruded clamping portion on the outer edge of the fixed gear body, which can also achieve the purpose of limiting in the circumferential direction.

[0077] The fixed gear bracket 91 can be sintered from powder metal, and the fixed gear body can be integrally injection molded from plastic, such as injection molded from high molecular material.

[0078] The assembly process of the electric valve of the present embodiment will be described below. The valve seat assembly can be assembled and fixed as an assembly first, that is, the first plate body portion 111, the second plate body portion 112, the third plate body portion 113, and the first connecting pipe 114, the second connecting pipe 115, and the columnar portion 116 are assembled in sequence, and then fixed by welding. The valve shaft 14 can be fixedly connected with the valve seat assembly by welding or press fitting.

[0079] Then the fixed gear bracket 91 is assembled to the valve seat assembly, so that the bracket positioning portion 922 cooperates with the positioning groove portion 1121 of the second plate body portion, and the two can be clearance fit. Then the valve shaft 14 and the bracket step portion 923 are positioned using a tool, so as to ensure that the fixed gear bracket 91 has good concentricity with respect to the valve shaft 14, and the fixed gear bracket 91 is pressed on the second plate body portion, so that the lower end surface 925 of the bracket abuts against the upper surface of the second plate body portion, and laser welding is performed to fixedly connect the fixed gear bracket with the second plate body portion.

[0080] Then, the gear slider is assembled, i.e., the through hole part 204 of the gear slider is assembled along the valve shaft 14, so that the fitting surface 2051 of the gear slider is fitted with the fitting surface 1134 of the third plate body part. Then, the planetary gear set 18 is partially assembled into the gear slider 20, and the small-diameter pinion 1832 of the planetary gear set 18 is engaged with the slider gear part 203, while the large-diameter tooth 1831 is located above the gear slider 20.

[0081] Then, the fixing gear body 92 is assembled into the fixing gear bracket 91 by applying glue on the bracket step part 923, and the clamping groove part 912 and the clamping part 927 are aligned and assembled in place, and then pressed, so that the fixing gear body 92 is adhered and fixed with the fixing gear bracket 91, and the fixing tooth 911 is engaged with the outside of the large-diameter tooth 1831 of the planetary gear set. Then, the rotor 12 with the sun gear 13, the spring 17, and the shaft sleeve 60 are assembled; then, the sleeve part is assembled, and the sleeve part is welded and fixed with the valve seat assembly. Of course, in this step, in addition to the glue adhering and fixing method, the fixing gear body and the fixing gear bracket can also adopt a press-fitting fixing method, for example, a part of the top of the fixing gear bracket is continuously extended upward on the upper end surface, and after the fixing gear body is assembled, the press-fitting operation is performed on the extended part to deform it, so as to limit the fixing gear body in the fixing gear bracket.

[0082] It should be noted that the above assembly sequence can also be adjusted accordingly, for example, the gear slider and the planetary gear can be assembled first, and then the fixing gear bracket 91 is welded and fixed with the valve seat assembly. That is, the above assembly process is only an exemplary description of the assembly method of the electric valve provided by the present embodiment, and does not mean to limit the unique assembly sequence of the electric valve.

[0083] It should be noted that the above, below, left, right and other orientation terms mentioned in the embodiments are based on the drawings as a reference, and are introduced for convenience of description; and the ordinal numbers in the component names, such as "first" and "second", are also introduced for convenience of description, and do not mean any order of the components. Moreover, in the embodiments described in the specification, various combinations of the embodiments for a certain component or assembly can be made under the condition of having the combination conditions, and are not limited to the technical features described in the embodiments, such as the above specific embodiment of the first plate-shaped part can be combined with other embodiments of the fixed gear in various ways to form a new embodiment. Limited by the length of the specification, all the technical solutions obtained by arranging and combining each different technical feature cannot be described as an embodiment respectively, but the skilled in the art should understand that the new technical solutions formed by combining the technical features without creative labor (such as only making adaptive structural adjustment known in the art when combining two components or parts) are within the protection scope of the claims of the present application.

[0084] The electric valve provided by the present application is described in detail above. The principles and embodiments of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An electrically operated valve characterised in that, The valve body (1) comprises a valve seat assembly (11), a fixed gear (19), a gear slider (20), a planetary gear set (18), and a valve shaft (14); the valve seat assembly (11) is fixedly connected or limitingly connected with the valve shaft (14), the valve seat assembly (11) is provided with a positioning groove (1121), and the valve seat assembly (11) is fixedly connected with a sleeve component; The planetary gear set (18) comprises at least one planetary gear (183), the planetary gear (183) comprises a large-diameter gear (1831) and a small-diameter gear (1832), and the outer side of the large-diameter gear (1831) is engaged with a fixed gear portion (1912) of the fixed gear (19); the gear slider (20) comprises a slider gear portion (203), and the slider gear portion (203) is engaged with the small-diameter gear (1832); The fixed gear (9) comprises a fixed gear body (91) and a fixed gear support (92), the fixed gear support (92) is made of a metal material, the fixed gear support (92) comprises a support positioning portion (922), the support positioning portion (922) is matched with the positioning groove (1121) to realize circumferential limiting, and the fixed gear support (92) is welded and fixed with the valve seat assembly; The fixed gear support (92) comprises a first inner circumferential wall (929) and a second inner circumferential wall (928), the inner circumferential wall of the fixed gear support is provided with a support step portion (923), the first inner circumferential wall (929) is located above the support step portion (923) in a relative manner, the second inner circumferential wall (928) is located below the support step portion (923) in a relative manner, and the inner diameter of the first inner circumferential wall (929) is greater than that of the second inner circumferential wall (928); The outer diameter of the fixed gear body (91) matches the inner diameter of the first inner circumferential wall (929), and the fixed gear body (91) abuts against the support step portion (923); The planetary gear set (18) comprises a planet carrier (181) and a cover plate (182), the planet carrier (181) comprises a bottom portion (1812) and a support column (1811) extending upward from the bottom portion (1812), the planet carrier (181) is fixedly connected with the cover plate (182), the planetary gears (183) are respectively fixed on the planet carrier (181) through planetary gear shafts (184), the planetary gears (183) can rotate around the planetary gear shafts (184), one end of the planetary gear shaft (184) is fixedly connected or limitingly abuts against the bottom portion (1812), and the other end is fixedly connected or abuts against the cover plate (182).

2. The motorized valve of claim 1, wherein, The fixed gear support comprises a support upper end face (926) and a support lower end face (925), the support positioning portion (922) protrudes from the support lower end face (925), and the support lower end face (925) abuts against the valve seat assembly.

3. The motorized valve of claim 2, wherein, The valve seat assembly comprises a first plate body part (111), a second plate body part (112) and a third plate body part (113), the first plate body part (111), the second plate body part (112) and the third plate body part (113) are sequentially adhered and welded and fixed, the positioning groove part (1121) is arranged at the outer edge part of the second plate body part (112), the lower end surface of the support (925) abuts against the second plate body part (112), and the fixed gear support (92) is fixedly connected with the second plate body part (112) through laser welding.

4. Motorised valve according to any of claims 1-3, characterised in that The inner peripheral wall of the fixed gear support (92) is provided with a protruding part (924) on the side close to the support positioning part (922), and the support positioning part (922) is located in the extension direction of the protruding part (924).

5. The motorized valve of claim 1, wherein, The outer edge part of the fixed gear body (91) is provided with a clamping groove part (912), the first inner peripheral wall (929) is provided with a clamping part (927) protruding from the surface of the first inner peripheral wall, and the clamping groove part (912) and the clamping part (927) are clamped with each other to realize the circumferential limiting of the fixed gear body (91) and the fixed gear support (92).

6. The motorized valve according to any one of claims 1-3, wherein, The fixed gear support (91) is sintered from a powder metallurgy material, and the fixed gear body (92) is injection molded from a high polymer material.

7. The motorized valve of claim 4, wherein, The gear sliding block (20) comprises a body part (201) and a positioning part (202), the outer diameter of the positioning part is greater than that of the body part (201), two ends of the positioning part form a first positioning part (2021) and a second positioning part (2022), the gear sliding block (20) can rotate around the valve shaft (14), when the gear sliding block (20) rotates to an extreme position, the first positioning part (2021) abuts against and is limited by the protruding part (924), and when the gear sliding block (20) reversely rotates to an extreme position, the second positioning part (2021) abuts against and is limited by the protruding part (924).

8. The motorized valve of any one of claims 1-3, wherein, The sleeve part comprises a first sleeve part (151) and a second sleeve part (152), the first sleeve part (151) is made of stainless steel material and comprises a first top wall part (1511) and a second side wall part (1512), the second sleeve part (152) is made of stainless steel material and comprises a second top wall part (1521) and a second side wall part (1522), and the first sleeve part (151) and the second sleeve part (152) are fixedly welded; alternatively, the sleeve part is formed by one-time stamping of a stainless steel plate material, and the first side wall part (1512), the second side wall part (1522), the first top wall part (1511) and the second top wall part (1521) are formed at the same time.

Images