CN114688280A

CN114688280A - Electric valve

Info

Publication number: CN114688280A
Application number: CN202011629225.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01
Anticipated expiration: 2040-12-31
Also published as: CN114688280B

Abstract

An electrically operated valve comprising a valve body comprising a valve seat assembly, a sleeve member, a valve shaft; the valve seat assembly is fixedly connected or in limited connection with the valve shaft, and the valve seat assembly is fixedly connected with the sleeve part; the valve seat assembly comprises a valve seat body part and a partition plate part, the valve seat body part comprises a first connecting pipe mounting part and a second connecting pipe mounting part, and the first connecting pipe mounting part and the second connecting pipe mounting part penetrate through the valve seat body part; the baffle portion includes the baffle body, baffle body sets up the baffle portion through-hole that runs through, baffle portion with valve seat body portion welded fastening, the installation department is taken over to the second at least part with the baffle body sets up relatively. According to the electric valve provided by the embodiment of the invention, the high-pressure refrigerant flowing in from the second connecting pipe cannot directly flow into the valve cavity, so that the direct impact of the high-pressure refrigerant on the gear sliding block is favorably reduced, and the working stability of the electric valve is favorably improved.

Description

Electric valve

[ technical field ] A

The invention relates to the technical field of refrigeration control, in particular to an electric valve.

[ background of the invention ]

Freezing and refrigerating equipment such as a refrigerator and the like is widely applied to various occasions, taking the refrigerator as an example, each temperature zone of the refrigerator is controlled according to a certain interval of preset temperature, namely intermittent refrigeration, and when the preset temperature is reached, a compressor is stopped; and when the actual temperature of the temperature zone is higher than the preset temperature, the compressor is started to refrigerate, so that the temperature of the temperature zone reaches the preset temperature. The compressor is stopped and restarted every time, larger starting power consumption can be generated, high-temperature refrigerants which enter the evaporator firstly and are heated up at the initial starting stage every time are all cooled after the high-temperature refrigerants reach the condition of refrigeration cycle, and the throttling is realized by adopting a capillary tube.

[ summary of the invention ]

An object of one embodiment of the present invention is to provide an electric valve that employs a planetary gear mechanism and can facilitate assembly of gears. Therefore, the following technical scheme is adopted in one embodiment of the invention:

an electrically operated valve comprising a valve body comprising a valve seat assembly, a sleeve member, a valve shaft; the valve seat assembly is fixedly connected or in limited connection with the valve shaft, and the valve seat assembly is fixedly connected with the sleeve part;

the valve seat assembly comprises a valve seat body part and a partition plate part, the valve seat body part comprises a first connecting pipe mounting part and a second connecting pipe mounting part, and the first connecting pipe mounting part and the second connecting pipe mounting part penetrate through the valve seat body part; the baffle portion includes the baffle body, baffle body sets up the baffle portion through-hole that runs through, baffle portion with valve seat body portion welded fastening, the installation department is taken over to the second at least part with the baffle body sets up relatively.

In the electric valve provided by the embodiment of the invention, at least part of the second connecting pipe mounting part is arranged opposite to the partition plate body, so that a high-pressure refrigerant flowing in from the second connecting pipe cannot directly impact the valve cavity but is blocked by the partition plate body, and the direct impact of the high-pressure refrigerant on the gear slider which is attached to the surface of the valve seat body part and slides is favorably reduced, thereby being favorable for improving the working stability of the electric valve.

[ description of the drawings ]

FIG. 1 is a schematic cross-sectional view of one embodiment of the present invention;

FIG. 2 is a top view of the valve seat assembly of the present embodiment in cooperation with the first and second adapters and the valve shaft;

FIG. 3 is a view A-A of FIG. 2;

fig. 4 is a perspective view of the structure of the valve seat assembly, the first connecting pipe, the second connecting pipe and the valve shaft provided in the present embodiment;

FIG. 5 is a perspective view of a fixed gear assembly according to one embodiment of the present invention;

FIG. 6 is a cross-sectional view of a fixed gear assembly according to one embodiment of the present invention;

FIG. 7 is a schematic front view of a gear slide according to a first embodiment of the present invention;

FIG. 8 is a schematic view of a gear slider from a reverse perspective according to a first embodiment of the present invention;

FIG. 9 is a schematic structural view of a planetary gear set provided in a first embodiment;

FIG. 10 is a schematic view of an assembled state of a planetary gear set in accordance with an embodiment of the present invention;

FIG. 11 is a schematic diagram of the position relationship between the gear slide and the seat assembly when the electric valve is in the fully closed state;

FIG. 12 is a schematic view of the position of the gear slide and seat assembly with the electric valve in the intermediate state of flow regulation;

FIG. 13 is a schematic diagram illustrating the position relationship between the gear slide and the seat assembly when the electrically operated valve is in a fully open flow state;

FIG. 14 is a schematic view of a refrigeration system;

fig. 15 is a flow chart for a refrigeration system.

[ detailed description ] A

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 in detail, fig. 1 is a schematic cross-sectional view of an embodiment of the invention. As shown in fig. 1, the motor-operated valve according to the present embodiment includes a valve body 1 and a stator coil (not shown). 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 drive controller, and when the drive controller is energized, a pulse drive signal is sent to the stator coil, and the stator coil generates a magnetic field that periodically changes, thereby driving the rotor 12 of the electric valve to rotate in the forward direction or the reverse direction.

Rotor 12 and sun gear 13 fixed connection, like this, when rotor 12 takes place to rotate, just can drive sun gear 13 and rotate in step, in this embodiment, rotor 12 and sun gear 13 are fixed connection, of course, also can set up to spacing connection, only need satisfy rotor 12 can drive sun gear 13 and rotate together can. The sun gear 13 is provided with a through hole penetrating through the center thereof, the valve shaft 14 penetrates through the through hole, the sun gear 13 can freely rotate around the valve shaft 14, one end of the valve shaft 14 is fixedly connected with the valve seat assembly 11, the other end of the valve shaft 14 is fixedly connected with a shaft sleeve 16 arranged at the top of the valve body, of course, the valve shaft 14 can be directly fixedly connected with the shell, and thus, the valve shaft 14 can provide good concentricity for the rotation of the rotor 12 and the sun gear 13.

The electric valve comprises a sleeve member, which in this embodiment comprises a first sleeve member 151 and a second sleeve member 152, the first sleeve member 151 being substantially in the shape of a sleeve with one open end, which may be made of stainless steel material, having a first top wall portion 1511 and a first side wall portion 1512, and the second sleeve member 152 being substantially in the shape of a sleeve with two open ends, which may also be made of stainless steel material, having a second top wall portion 1521 and a second side wall portion 1522. The second sidewall of the second sleeve member has a larger diameter than the first sidewall of the first sleeve member, so that the lower end of the first sleeve member 151 is fixed to the top wall of the second sleeve member 152, for example, by welding. The lower edge portion of the second sidewall portion 1522 of the second sleeve member 152 is fixedly connected to the valve seat assembly 11, for example, by welding. Of course, fig. 1 shows a specific structure and connection manner of the first sleeve member and the second sleeve member as a specific embodiment, and those skilled in the art may also realize the above connection relationship by changing the second sleeve member not to have the second top wall portion 1521 but to have a constant diameter sleeve with two open ends, and to have a bottom wall portion extending outward in the radial direction at the bottom of the first sleeve member and then fixedly connected to the second sleeve member. Alternatively, the first and second ferrule members are not distinguished, but are integrally formed, for example, by one-step press forming of a metal plate, so that the first side wall portion 1512, the second side wall portion 1522, the first top wall portion 1511, and the second top wall portion 1521 are formed at the same time, which can also achieve the object of the present invention.

One end of the bushing 16 is connected to the valve shaft 14 in a limited or fixed manner, the other end of the bushing 16 abuts against the first top wall 1511, and the edge of the bushing 16 may abut against the first sidewall 1512, as shown in fig. 1, the bushing 16 ensures that the axis of the valve shaft and the central axis of the valve body substantially coincide. A spring 17 is arranged between the shaft sleeve 16 and the sun gear 13, and the spring 17 can provide a certain pretightening force for the sun gear 13 and restrain the sun gear 13 from generating an overlarge upward displacement. In the present embodiment, the lower end of the spring is in contact with the sun gear in the connection mode between the sun gear 13 and the rotor 12, but the lower end of the spring may be in contact with the rotor because the sun gear and the rotor can be regarded as one unit and there are various structural combinations.

In the valve cavity that is roughly enclosed by first sleeve part, second sleeve part, valve seat subassembly, still be provided with planetary gear assembly 18, fixed gear 19, valve block gear 20, its main theory of operation is: the rotor and the sun gear rotate to drive the planetary gear of the planetary gear assembly to rotate, and the planetary gear rotates and simultaneously drives the valve block gear to rotate so as to change the position of the valve block gear relative to the valve seat assembly and achieve the purpose of controlling flow. The structure and connection or mating relationship of the valve seat assembly, planetary gear assembly, fixed gear, valve block gear will be described below.

Referring to fig. 2, fig. 3, fig. 4, fig. 2 is a top view of a structure of the valve seat assembly, the first connecting tube, the second connecting tube and the valve shaft according to the present embodiment, fig. 3 is an a-a view of fig. 2, and fig. 4 is a perspective view of the structure of the valve seat assembly, the first connecting tube, the second connecting tube and the valve shaft according to the present embodiment. The present embodiment provides a seat assembly 11, which includes a seat body 111 and a partition 112. The electric valve further includes a first nipple 114 and a second nipple 115, and the valve seat body portion 111 is fixedly assembled with the first nipple 114 and the second nipple 115. The first connecting pipe 114 and the second connecting pipe 115 are respectively used as an inflow channel or an outflow channel of a fluid medium of an electric valve, and are generally used for being installed in a refrigerating and heating system such as a refrigerator, a freezer, an air conditioner and the like to be connected with a system pipeline.

The valve seat main body 111 is provided with a mounting hole portion 1111, and in the present embodiment, the mounting hole portion 1111 has a blind hole structure, i.e., does not penetrate the valve seat main body 111, and after assembly, the valve shaft 14 is inserted into the first hole portion 1111 and fixed. The valve seat body 111 is further provided with a first connecting pipe mounting portion 1112 and a second connecting pipe mounting portion 1113 on the other side of the mounting hole portion 1111, the first connecting pipe mounting portion 1112 and the second connecting pipe mounting portion 1113 are through holes penetrating the upper and lower surfaces of the first plate portion 111, the first connecting pipe 114 is fixedly connected with the first plate portion 111 through the first connecting pipe mounting portion 1112, and the second connecting pipe 115 is fixedly connected with the first plate portion 111 through the second connecting pipe mounting portion 1113. In this embodiment, the through holes of the first connecting pipe mounting part 1112 and the second connecting pipe mounting part 1113 are step-shaped, and when the first connecting pipe and the second connecting pipe are mounted, the step part can play a role in positioning, that is, the first connecting pipe 114 is abutted against the step part after being inserted into the first connecting pipe mounting part 1112, so that the inserting depth is ensured. The outer edge of the valve body 111 is provided with a first step 1114 and a second step 1115, and when assembling, the second sidewall 1522 of the second sleeve member can be abutted, positioned and matched with the first step 1114, and can be fixedly connected in a welding manner. Second step 1115 is used to locate and mate with a fixed gear assembly as described below.

The valve seat body 111 is further provided with a flow rate adjusting portion 1116 and a valve port portion 1117, the flow rate adjusting portion 1116 is provided on the upper surface of the valve seat body 111, i.e. the fitting surface 1134, the flow rate adjusting portion 1116 is recessed inward with respect to the fitting surface 1134 to form a non-penetrating groove-like structure, and is connected to the valve port portion 1117 at one end of the groove, the valve port portion 1117 is formed to penetrate the valve seat body and can communicate with the interior of the first connecting pipe 114, and fluid can flow into the valve cavity of the electric valve from the second connecting pipe 115, can flow along the flow rate adjusting portion 1116, and can flow out of the first connecting pipe 114 from the valve port portion 1117. The valve port 1117 forms a flow hole penetrating the valve seat body 111, and a valve port outline 1117a is formed on the mating surface 1134. On one side of the valve port portion 1117, an inwardly recessed flow-regulating portion 1116 is formed in the mating surface 1134, and the flow-regulating portion 1116 has an elongated arc-shaped groove shape as a whole, and an edge line of the flow-regulating portion 1116 is defined by a first curve 1116a and a second curve 1116 b. The first curve 1116a may be an archimedes spiral or a circular arc, and one end of the first curve 1116a intersects with the valve port contour 1117a of the valve port portion 1117 at the mating surface 1134 at a point B. The second curve 1116b may take the form of an archimedes spiral, with one end of the second curve 1116b intersecting the valve port contour 1117a at point C. Thus, the distance between the first curve 1116a and the second curve 1116b gradually increases in the direction approaching the valve port 1117. The flow rate adjusting portion 1116 is small in overall size, and is particularly suitable for precise adjustment of a small flow rate, such as refrigerant flow rate adjustment of a refrigeration system of a refrigerator, compared with a flow rate adjusting valve that generally adopts a needle valve structure. A gear slider, described below, can engage the mating surface 1134 and rotate relative to the valve seat body to vary the cross-sectional flow area of the flow regulator.

Further, the depth of the flow-regulating portion 1116 may be set so that the depth of the flow-regulating portion 1116 gradually increases along the extending direction of the valve port portion 1117, and as a specific embodiment, at the end near the valve port portion 1117, the depth H1 of the flow-regulating portion 1116 satisfies: 0.3mm < H1 < 0.7mm, and the depth H2 of the flow regulator 1116 at the other end near the flow regulator 1116 satisfies: h2 is more than 0.05mm and less than 0.15 mm. Thus, the small flow can be realized, the adjusting range is expanded, and the flow adjustment approaches to linear change. In practical operation, the width and depth of the flow regulator 1116 may be set according to the flow requirement of the system to meet different requirements.

The partition part 112 is substantially a plate-shaped structure, and can be processed by powder metallurgy, and includes a partition body 1123, the partition body 1123 is provided with a plurality of partition part through holes 1121 penetrating up and down, and a partition part boss 1122 protruding upward on one surface thereof for initial limit of the gear slide block 20. The partition portion 112 and the valve seat body portion 111 may be fixed by welding such that the second nipple mounting portion 1113 is opposed to the partition body 1123 in the axial direction, or at least partially opposed to the partition body 1123. Note that the separator body 1123 described herein refers to a solid portion that does not include the separator portion through hole 1121. In this embodiment, the second connecting pipe mounting portion is completely opposite to the partition body 1123, so that the high-pressure refrigerant flowing from the second connecting pipe 115 does not directly flow into the valve cavity but is blocked by the partition body 1123, and therefore, the gear slider 20 sliding in contact with the surface of the valve seat body 111 does not directly receive the impact force of the high-pressure refrigerant, which is beneficial to improving the working stability of the electric valve. After the partition portion 112 and the valve seat body portion 111 are fixed, a substantially annular flow passage 116 is formed therebetween, and the high-pressure refrigerant flows in from the second connection pipe 115, is blocked and buffered by the partition body 1123, enters the flow passage 116, and then flows into the valve chamber of the electric valve through the partition portion through holes 1121.

The partition portion boss 1122 is used to initially limit the position of the gear slider 20, and specifically, as shown in the hatched triangle of fig. 2, the triangle formed by connecting the central axis of the valve seat mounting hole portion 1111, the central axis of the valve port portion 1117 and one end point of the partition portion boss 1122 at a certain cross section, this arrangement has the advantage that since the relative positions of the valve seat mounting hole portion 1111 and the valve port portion 1117 are fixed, the relative positions of the partition portion boss 1122 and the valve seat can be positioned by a tool, so that the hatched triangles shown in the figure are always consistent, that is, the relative positions are determined at three points, in other words, when mass production is performed, the partition portion 112 can always maintain the substantially same relative position as the valve seat main body portion 111 while necessary assembly errors are eliminated, and thus the relative positions of the slider gear 20 and the valve port portion 1117 are also ensured, the consistency of the product is relatively good, so that the flow control of the electric valve is more accurate.

Referring to fig. 5 and 6, fig. 5 is a perspective view of a fixed gear assembly according to an embodiment of the present invention, and fig. 6 is a sectional view of the fixed gear assembly according to the embodiment of the present invention. The fixed gear 19 includes a fixed gear body 191 and a fixed gear bracket 192. As shown in fig. 5, the fixed gear bracket 192 may be made of stainless steel pipe or plate material by stamping, rolling, and welding. Specifically, the fixed gear holder 192 is formed in a substantially thin hollow cylindrical shape, and a plurality of holder through-holes 1921 are formed in an upper peripheral wall of the fixed gear holder 192 with reference to fig. 5, and the holder through-holes 1921 can be processed by punching. The fixed gear carrier has a carrier upper end surface 1922 and a carrier lower end surface 1923, wherein the carrier lower end surface 1923 abuts the second step 1115 after assembly to achieve downward limiting of the axial position of the fixed gear. The fixed gear bracket 192 may be fixedly coupled to the valve seat body portion 111 by welding, such as laser welding.

The fixed gear body 191 is substantially annular and may be formed by injection molding. That is, the fixed gear holder 192 can be placed in a predetermined mold, and the fixed gear body 191 is formed by injection molding, and due to the arrangement of the holder through hole portions 1921, corresponding protruding portions 1911 are formed on the outer peripheral wall of the fixed gear body, and the protruding portions 1911 are tightly combined with the holder through hole portions 1921, so that the fixed gear body 191 and the fixed gear holder 192 are fixedly connected into a whole and are not easy to loosen or fall off. The inner edge of fixed gear body 191 is fixed gear 1912 for meshing with the planetary gear set 18 as described below.

The fixed gear assembly provided by the embodiment comprises a fixed gear support and a fixed gear body, wherein the fixed gear support is of a sleeve structure with two open ends, materials are convenient to obtain, the fixed gear support is simple to process and suitable for mass production, the fixed gear body is directly placed into a mold as an insert to be subjected to injection molding at the fixed gear support, the fixed gear support and the mold are tightly combined, and the consistency of products is good. Meanwhile, the fixed gear bracket is made of metal materials and is directly welded with the valve seat body in a laser welding mode, so that the fixed gear assembly is reliably positioned in the axial direction. The fixed gear assembly provided in the present embodiment is applicable to electric valve products having different structures, and the technical effects produced by the fixed gear assembly do not depend on the valve seat structure, the slider structure, and the like described in the above embodiments.

Referring to fig. 7 and 8, fig. 7 is an external view of a gear slider from a front perspective according to a first embodiment of the present invention, and fig. 8 is an external view of a gear slider from a back perspective according to a first embodiment of the present invention. The gear slider 20 is substantially cylindrical with a bottom, and includes a main body 201 and a positioning portion 202 protruding from an outer peripheral portion of the main body 201, and the positioning portion 202 has a substantially sector ring-shaped cross section and is disposed coaxially with the main body 201, that is, an outer diameter of the positioning portion 202 is larger than an outer diameter of the main body 201, so that the positioning portion 202 forms two end portions, that is, a first positioning portion 2021 and a second positioning portion 2022. The gear slide 20 further includes a through hole portion 204 disposed at a central position thereof, and the valve shaft 14 is fixedly connected to the valve seat assembly after passing through the through hole formed by the through hole portion 204, so that the gear slide 20 can rotate around the valve shaft 14. After assembly, the gear slider 20 is coaxially disposed with the fixed gear 19, and the distance between the peripheral wall of the positioning portion 202 and the central axis matches the distance between the partition portion boss 1122 of the partition portion 112 and the central axis, that is, when the gear slider 20 rotates to the limit position in the counterclockwise direction in the figure, the first positioning portion 2021 abuts against one side of the partition portion boss 1122, so that the gear slider cannot rotate any further; when the gear slider 20 rotates clockwise to the limit position as shown in the figure, the second positioning portion 2022 contacts the other side of the partition portion boss 1122, and the gear slider cannot rotate any further. The engagement of the positioning portion 202 and the partition portion boss 1122 thus determines the rotational stroke of the gear slide. It should be noted that the length of the positioning portion 202 (i.e., the length along the circumferential direction of the gear slide) can be adjusted according to the needs of the system.

The inner peripheral wall of the gear slider 20 is provided with a slider gear portion 203, and the slider gear 203 can be engaged with a planetary gear assembly described below and can be rotated by the planetary gear. As shown in fig. 7, the flow control portion 205 extends a certain height along the axial direction on the bottom surface of the gear slider 20, and forms an abutting surface 2051 for abutting against the engaging surface 1134 of the valve seat main body portion 111 and being rotatable with respect to the engaging surface 1134, and a notch portion 2052 is provided at a portion of the flow control portion 205, so that when the gear slider 20 abuts against the valve seat main body portion 111, the flow control portion 205 is located at the notch portion 2052 and does not contact with the third plate portion 113, and fluid can flow into or out from the space formed by the notch portion 2052.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a planetary gear set according to a first embodiment. The planetary gear set 18 includes a carrier 181 and a cover plate 182, and the 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 present embodiment exemplifies the structure of 3 planetary gears, and the structure of the planetary gear may be actually set according to the requirement of the output torque, and is not limited to 3 planetary gears. For this reason, in the present embodiment, the number of the support columns 1811 is also 3, and the support columns are uniformly distributed in the circumferential direction, and 3 planetary gears 183 are provided between two adjacent support columns 1811. The planet carrier 181 is fixedly connected to the cover plate 182 to axially limit the planet gear 183. Specifically, a small hole may be provided in the cover plate 182, and the end 18111 of the support column 1811 may be deformed by pressure welding after protruding through the small hole, thereby achieving a fixed connection. The planet carrier 181 may be formed by plastic injection molding, and the cover plate 182 may be formed by stamping a metal plate, so that the end 18111 may be conveniently heated and deformed, and the cover plate may not be separated from the planet carrier. The 3 planetary gears 183 are respectively limited on the planetary carrier by the planetary gear shafts 184, and the planetary gears 183 can rotate around the planetary gear shafts 184, one ends of the planetary gear shafts 184 are fixedly connected or limited and abutted with the bottom 1812 of the planetary carrier, and the other ends are fixedly connected or abutted with the cover plate 182.

Taking one of the planetary gears 183 as an example, the planetary gear 183 includes two-stage gears, i.e., a large-diameter gear 1831 at an opposite upper end and a small-diameter gear 1832 at an opposite lower end. The end surface of the large diameter gear 1831 side of the planetary gear 183 is provided with a plurality of positioning holes 1833 at opposite positions. During assembly, sun gear 13 is inserted downward from the central axis of planetary gear set 18 and meshed with large-diameter gear 1831 to rotate planetary gears 183, 3 planetary gears 183 form a virtual circle, the inner side of large-diameter gear 1831 is meshed with sun gear 13, and the outer side of large-diameter gear 1831 is meshed with fixed teeth 1912 of fixed gear 19. Thus, when the sun gear 13 rotates, the planetary gears 183 rotate, and the planetary gears 183 rotate along the fixed gear teeth 1912 while rotating themselves around the planetary gear shafts 184. The small diameter gear 1832 meshes with the slider gear portion 203 of the gear slider 20 to rotate the gear slider 20, and the rotation of the gear slider is stopped by the abutment of the first positioning portion 2021 and the second positioning portion 2022 against the boss 1921 of the fixed gear. In this way, the electric valve drives the rotor and the sun gear 13 to rotate by energizing the electromagnetic coil, and the electric valve finally drives the gear slider 20 to rotate by decelerating through the planetary gear set, and the notch 2052 of the flow control portion corresponds to a different portion of the flow rate adjusting portion 1116 of the third plate portion by the fitting of the flow control portion 205 provided at the bottom of the gear slider to the fitting surface 1134 of the valve seat main body portion 111, thereby realizing the flow rate adjusting function.

Referring to fig. 10, fig. 10 is a schematic view of an assembled state of a planetary gear set according to an embodiment of the present invention. In the present embodiment, the number of teeth of the sun gear is 12, and the number of teeth of the sun gear corresponds to 24 poles of the motor rotor, so that phase deviation hardly occurs in a product at the time of assembly. The number of the fixed teeth arranged on the fixed gear is 48, the number of teeth of the large-diameter gear 1831 of the planetary gear assembly is 18, and the number of teeth of the small-diameter gear 1832 is 12; correspondingly, the number of positioning holes 1833 is 6, which is a common divisor of 18 and 12. This design can achieve 1: 21, i.e. a smaller planetary gear set is used to output a larger gear ratio. The planetary gear medium and large diameter gear 1831 is set to 18 teeth, and the small diameter gear is set to 12 teeth, so that the structural space of the output component can be miniaturized, the initial positioning space of the electric valve is relatively increased, the electric valve is miniaturized, the strength of the output end transmission gear can be increased, and the reliability of the product is improved. The positioning hole 1833 is used to determine the relative position and angle during gear assembly, so as to facilitate the assembly operation. As shown in fig. 10, during assembly, an included angle between each two of connecting lines from three positioning holes 1833 of three planetary gears to a midpoint of the planetary gear mechanism is 120 degrees, so that the three planetary gears can be conveniently meshed with the fixed gear or the slider gear, and since the positioning holes 1833 limit angles of the planetary gear teeth, smooth meshing during assembly can be ensured, and interference can be reduced. Namely, the three planet wheels have determined gear tooth orientations after being positioned during assembly, can be firstly assembled with the fixed gear and then matched with the inner gear ring of the gear slider, and can also be firstly assembled with the inner gear ring of the gear slider and then assembled with the fixed gear. The number of internal teeth of the slider gear portion may be set as needed, and in the present embodiment, the number of teeth of the slider gear portion is 42.

The process of flow regulation is described below in conjunction with fig. 11-15. Fig. 11 is a schematic diagram of a positional relationship between a gear slider and a valve seat assembly when the electric valve is in a fully closed state, fig. 12 is a schematic diagram of a positional relationship between a gear slider and a valve seat assembly when the electric valve is in an intermediate state of flow adjustment, and fig. 13 is a schematic diagram of a positional relationship between a gear slider and a valve seat assembly when the electric valve is in a fully open state of flow. Fig. 14 is a schematic view of a refrigeration system, and fig. 15 is a flow chart of a refrigeration system.

As shown in fig. 14, a refrigeration system includes a compressor a01, an evaporator a02, a condenser a03, and an electric valve a04, which form a basic refrigeration system circuit. Meanwhile, a filter A05 can be arranged in the loop to filter impurities in the refrigeration system, so that the good operation of the system is ensured. In the refrigeration system, the electric valve described above in the present application is used to replace a capillary tube commonly used in throttling in a common refrigeration system of a refrigerator, so that the refrigerant flow rate of the refrigeration circuit can be adjusted, as shown in fig. 15, when the electric valve is at a 10Ps (pulse) position, the flow rate is 0, and at this time, the electric valve is in a fully closed state. Specifically, as shown in fig. 11, the second positioning portion 2022 of the gear slider 20 abuts against one side of the partition portion boss 1122, and at this time, in the projection view shown in fig. 11, the projection of the notch portion 2052 provided in the flow rate control portion 2051 in the axial direction does not overlap with both the flow rate adjustment portion 1116 and the valve port portion 1117, that is, both the flow rate adjustment portion 1116 and the valve port portion 1117 are covered by the flow rate control portion 2051, and the fluid cannot flow into the flow rate adjustment portion 1116, and at this time, the electrically operated valve is in the fully closed state. That is, the gear slider 20 and the valve seat main body portion 111 have at least one relative position, and there is no overlapping region between the projection of the notch portion 2052 in the axial direction and the projection of the valve port portion 1117 in the axial direction, and between the projection of the notch portion 2052 in the axial direction and the projection of the flow rate adjusting portion 1116 in the axial direction.

As shown in fig. 15, the electric valve is a linear flow rate control region in a range of 50Ps to 500Ps, and controls the flow rate control region range. Specifically, as shown in fig. 12, when the gear slider 20 is rotated counterclockwise by a predetermined angle, the projection of the flow rate control portion 2051 in the axial direction overlaps the flow rate adjustment portion 1116, that is, a black region shown in the drawing, and the black region is a part of the flow rate adjustment portion 1116, at this time, the fluid in the valve chamber of the electric valve can flow in from the space formed by the notch portion 2052, flow into the arc-shaped groove formed by the flow rate adjustment portion 1116 through the black region of the flow rate adjustment portion 1116, and then flow out from the valve opening portion 1117, and at this time, the cross-sectional area of the black region determines the throttle flow rate of the electric valve. It will be understood by those skilled in the art that fig. 12 shows a specific position of the gear slider, and the cross-sectional area of the corresponding black area will increase with the continuous rotation of the gear slider 20, which is the flow rate adjusting process of the electric valve, and the flow rate adjusting interval is 0.25-10L/min, as shown in fig. 15. That is, the gear slider 20 and the valve seat main body 111 are at least located at one relative position, and the projection of the notch 2052 in the axial direction overlaps the projection of the flow rate adjusting portion 1116 in the axial direction, and the cross-sectional area where the projections overlap defines the flow rate of the electrically operated valve. When the refrigerator is initially electrified, the control of the evaporation temperature of the evaporator and the surface temperature of the evaporator are in a condensation state through flow control (0.25-10L/min) of the valve, convection is formed by driving air of the freezing chamber through the evaporator by the fan, dehumidification treatment is carried out on the refrigerator body within set time, after the dehumidification treatment, the output flow of the electric valve is adjusted, the evaporation temperature of the evaporator and the surface temperature of the evaporator are controlled, cooling of the freezing box body is realized, after the dehumidification treatment, frosting and icing on the surface of the evaporator can be reduced and slowed down, the heat exchange efficiency is improved, and quick cooling of the refrigerator and energy consumption reduction are realized. For the air-cooled refrigerator, the evaporator can be defrosted, the evaporation temperature of the evaporator and the surface temperature of the evaporator can be adjusted to be in a condensation state, and the humidity of a refrigerating chamber of the air-cooled refrigerator can be increased and controlled through a fan and a damper, so that the fresh-keeping effect of the air-cooled refrigerator is improved. For the direct cooling refrigerator, a plurality of evaporators can be arranged in series, an electric valve is arranged at the inlet of each evaporator when necessary, or the evaporators are connected in parallel, and the inlet of each evaporator is provided with an electric valve.

As shown in fig. 15, the electric valve is switched from the flow rate regulation state to the fully open state at 500Ps to 650 Ps. The full-open flow is not less than 200L, and when the system runs under the state, the refrigerant path is as follows: compressor a01 discharge port → condenser a04 → filter a05 → electric valve a04 → evaporator a02 → compressor a01 suction port. As shown in fig. 13, when the gear slider 20 rotates counterclockwise until the first positioning portion 2021 abuts against the other side of the partition portion boss 1122, the rotation is stopped, and at this time, the projection of the notch portion 2052 in the axial direction forms an overlapping region with the portion of the flow rate adjustment portion near the valve port portion and the valve port portion, that is, the entire valve port portion 1117 is located at the position of the notch portion 2052, and at this time, the fluid in the valve chamber of the electric valve flows in from the space formed by the notch portion 2052 and flows out from the valve port portion 1117, and as shown by the black area in fig. 13, the electric valve is in the full open state at this time. That is, the gear slider 20 and the valve seat main body 111 have at least one relative position, at least a partial projection of the notch 2052 in the axial direction overlaps with a projection of the valve port 1117 in the axial direction, the valve port formed by the valve port 1117 communicates with the internal space of the first pipe 114, and the inner diameter of the valve port 1117 defines the flow rate of the electrically operated valve. In the integral operation state, the electric valve is fully opened, the flow rate is through, the state is close to a non-throttling state, only gaseous cold coal circularly flows in a pipeline, and the temperature of the cold coal flowing into the evaporator is close to the ambient temperature under the normal room temperature state, so that the cold coal is exchanged with the outer surface of the evaporator of the freezing chamber, and the defrosting of the generator is realized.

The assembly process of the electric valve will be described below. In one embodiment, the valve seat assembly may be assembled and fixed to one assembly, that is, the valve seat body 111 and the partition 112, and then fixed by welding. Or the valve seat body 111 is welded and fixed to the first connecting pipe 114 and the second connecting pipe 115 and then welded and fixed to the diaphragm 112. The valve shaft 14 may be fixedly connected to the valve seat assembly by welding or press-fitting. Then, the gear slider is fitted, that is, the through hole portion 204 of the gear slider is fitted along the valve shaft 14, and the contact surface 2051 of the gear slider is brought into contact with the mating surface 1134 of the valve seat. Planetary gear set 18 is then loaded into gear slider 20, and small diameter gear 1832 of planetary gear set 18 meshes with slider gear portion 203, while large diameter gear 1831 is located above gear slider 20. Then, the fixed gear 19 is loaded from above, and the fixed gear portion 1912 meshes with the outer side of the large diameter tooth 1831 of the planetary gear set. Then, the fixed gear holder 192 is welded and fixed to the valve seat body portion. Then, the rotor 12 with the sun gear 13, the spring 17 and the shaft sleeve 16 are installed; and then fitted into the sleeve member.

Alternatively, another assembly method may also be employed: the valve seat assembly is assembled and fixed into one assembly, that is, the valve seat body 111 and the partition 112 are assembled and then fixed by welding. Or the valve seat body 111 is welded and fixed to the first connecting pipe 114 and the second connecting pipe 115 and then welded and fixed to the diaphragm 112. The valve shaft 14 may be fixedly connected to the valve seat assembly by welding or press-fitting. Preparing a fixed gear assembly, and putting a fixed gear bracket serving as an insert into a mold to perform injection molding on a fixed gear body; assembling the planetary gear assembly to the fixed gear assembly, enabling the included angle of a connecting line from each positioning hole of the three planetary gears to the midpoint of the planetary gear assembly to be 120 degrees through a positioning tool, and then meshing and assembling the planetary gear assembly with the fixed gear assembly; assembling the gear sliding block to the planetary gear assembly, and then assembling the fixed gear assembly, the planetary gear assembly and the gear sliding block as a whole along the valve shaft, so that the joint surface of the gear sliding block is jointed with the joint surface of the valve seat body part; the outer side of a large-diameter gear of the planetary gear assembly is meshed with the fixed gear; and carrying out laser welding fixing on the fixed gear bracket and the valve seat assembly. Then, the rotor 12 with the sun gear 13, the spring 17 and the shaft sleeve 16 are installed; and then fitted into the sleeve member.

In the above two assembling methods, the sleeve member may be assembled into the sleeve member by preparing the first sleeve member and the second sleeve member separately as described in the first embodiment and then welding, or may be formed by press-molding the sleeve member integrally. The sleeve member 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, and after assembly, the second top wall portion 1521 is press-fitted to the upper end edge of the fixed gear 19 in an interference manner, so as to axially position the fixed gear, and the sleeve member and the valve seat assembly are welded and fixed.

The assembly sequence can also be adjusted correspondingly, for example, the gear slide block and the planetary gear can be assembled firstly, and then the fixed gear bracket and the valve seat assembly are welded and fixed. That is, the above-described assembling process is merely an example to explain the assembling method of the electric valve provided in the present embodiment, and is not meant to limit the only assembling order of the electric valve.

It should be noted that, in the present embodiment, the terms of orientation such as up, down, left, right, etc. are used as references in the drawings of the specification and are introduced for convenience of description; and the use of ordinal numbers such as "first," "second," etc., in the component names, are also included for convenience of description and are not intended to imply any limitation on the order in which the components are recited. In the embodiments described in the present specification, various combinations of the embodiments of a certain component or assembly may be made under the condition of having the combination condition, and the embodiments are not limited to the technical features described in the embodiments, and for example, a specific embodiment related to a valve seat body may be combined with other embodiments related to a fixed gear to form a new embodiment. For the sake of brevity, this disclosure does not describe every conceivable combination of features or aspects of the disclosure as an example, but one of ordinary skill in the art will recognize that many further combinations of features can be made without the use of inventive faculty (e.g., only making structural adaptations known in the art when two elements or components are combined) without departing from the scope of the invention as defined by the claims.

The electrically operated valve provided by the present invention has been described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. An electrically operated valve, characterised by comprising a valve body (1), said valve body (1) comprising a valve seat assembly (11), a sleeve member, a valve shaft (14); the valve seat assembly (11) is fixedly connected or in limited connection with the valve shaft (14), and the valve seat assembly (11) is fixedly connected with the sleeve part;

the valve seat assembly comprises a valve seat body part (111) and a partition plate part (112), the valve seat body part (111) comprises a first connecting pipe mounting part (1112) and a second connecting pipe mounting part (1113), and the first connecting pipe mounting part (1112) and the second connecting pipe mounting part (1113) penetrate through the valve seat body part (111); the partition part comprises a partition body (1123), a through hole (1121) of the partition part is formed in the partition body (1123), the partition part (112) is fixedly welded with the valve seat body part (111), and at least part of the second connecting pipe mounting part (1113) is opposite to the partition body (1123).

2. The electric valve according to claim 1, wherein the outer edge of the valve body main body portion (111) is provided with a first step portion (1114) and a second step portion (1115), the first step portion (1114) abuts against the sleeve member and is welded and fixed, and the second step portion (1115) is fixedly connected with the fixed gear assembly.

3. The electrically operated valve as claimed in claim 1, wherein the partition portion (112) is plate-shaped, and a partition portion boss (1122) is protrudingly provided on one surface thereof, the partition portion boss (1122) being for limiting abutment with the gear slider.

4. An electric valve according to any one of claims 1 to 3, wherein the valve seat body (111) is provided with a mounting hole portion (1111), the mounting hole portion (1111) does not penetrate the valve seat body (111), and the valve shaft (14) is fixedly connected by being inserted into the mounting hole portion (1111).

5. An electrically operated valve according to any one of claims 1 to 3, wherein the valve seat body portion (111) is provided with a flow rate regulating portion (1116) and a valve port portion (1117), the flow rate regulating portion (1116) being recessed inward with respect to a surface of the valve seat body portion (111) and not penetrating through the valve seat body portion (111), the valve port portion (1117) being connected to the flow rate regulating portion (1116), and the valve port portion (1117) penetrating through the valve seat body portion (111).

6. The electrically operated valve as claimed in claim 5, wherein the flow rate adjusting portion (1116) has a shape of a long and narrow arc groove, edge lines at both sides constitute a first curve (1116a) and a second curve (1116b), the first curve (1116a) and the second curve (1116b) form an Archimedes spiral or a circular arc line, and a distance between the first curve (1116a) and the second curve (1116b) is gradually increased in a direction approaching the valve port portion (1117).

7. The electric valve according to claim 6, characterised in that the depth of the flow regulating part (1116) gradually increases towards the extension along the valve mouth part (1117), and near the end of the valve mouth part (1117), the depth H1 of the flow regulating part (1116) satisfies: 0.3mm < H1 < 0.7mm, and the depth H2 of the flow regulator 1116 at the other end near the flow regulator 1116 satisfies: h2 is more than 0.05mm and less than 0.15 mm.

8. An electric valve according to any of claims 1-3, characterised in that the bushing member comprises a first bushing member (151) and a second bushing member (152), the first bushing member (151) comprising a first top wall portion (1511) and a first side wall portion (1512), the second bushing member (152) comprising a second top wall portion (1521) and a second side wall portion (1522), the diameter of the second side wall portion (1522) being larger than the diameter of the first side wall portion (1512).

9. The electrically operated valve of claim 8, wherein the first bushing member (151) comprises a first top wall portion (1511), a first side wall portion (1512), and a second top wall portion (1521), and the second bushing member (152) is cylindrical and comprises a second side wall portion (1522), and the diameter of the second side wall portion (1522) is larger than the diameter of the first side wall portion (1512).

10. An electric valve according to any one of claims 1-3, wherein the sleeve member is formed by one-step press forming of a metal plate material, and integrally forms a first top wall portion (1511), a first side wall portion (1512), a second top wall portion (1521), and a second side wall portion (1522).