CN115560093A - Valve core and electrically operated valve - Google Patents

Abstract

The utility model provides a case, the case is the cylindricality, have first opening, second opening and pore, along the axial of case, first opening and the setting of staggering of second opening, the throttle groove communicates with first opening, the throttle groove is inwards sunken from the outer peripheral face of case, the throttle groove extends along the outer peripheral face of case from first opening, first opening and the setting of staggering of second opening in the axial of case, enough space has been reserved for the throttle groove like this, make the throttle groove can the great scope cover the case outer peripheral face, under the condition that through the case flow is the same, the shared case circumference angle of throttle groove is big more, along throttle groove length direction, the throttle area change in throttle groove is gentler, the flow curve linearity that corresponds with the case is better, be favorable to improving motorised valve control accuracy.

Description

Valve core and electrically operated valve

Technical Field

The application relates to the field of fluid control, in particular to a valve core and an electric valve with the valve core.

Background

The electric valve can be applied to a vehicle refrigerant circulating system and comprises a control device and a valve core, wherein the valve core is driven to move by the output torque of the control device, and how to design the valve core is beneficial to improving the linearity of a flow curve of the electric valve and improving the control precision is a technical problem to be improved.

Disclosure of Invention

The application aims to provide a valve core and an electric valve, which are beneficial to improving the linearity of the flow curve of the electric valve and improving the control precision.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a valve core is cylindrical and provided with a first opening, a second opening and a pore channel, wherein the first opening is located on the outer peripheral surface of the valve core, the second opening is located on the outer peripheral surface of the valve core or the end surface of the valve core, the first opening and the second opening are arranged in a staggered mode in the axial direction of the valve core, the pore channel is located inside the valve core and communicated with the first opening and the second opening, the valve core is further provided with a throttling groove, the throttling groove is communicated with the first opening, the throttling groove is inwards sunken from the outer peripheral surface of the valve core, and the throttling groove extends from the first opening end along the outer peripheral surface of the valve core.

The utility model provides an electrically operated valve, includes controlling means, valve body subassembly and case, the valve body subassembly includes the valve body, the valve body has the valve body chamber, the case is located the valve body chamber, controlling means has the output shaft, the output shaft with the case transmission is connected, controlling means with valve body subassembly fixed connection, the case is foretell case, the valve body includes first circulation portion and second circulation portion, second circulation portion with the second opening intercommunication, through rotatory the case, first circulation portion with first opening can communicate or not communicate, the throttle groove can with first circulation portion intercommunication or not communicate.

The application provides a case and include motorised valve of above-mentioned case, the case is the cylindricality, first opening has, second opening and pore, along the axial of case, first opening and the setting of staggering of second opening, the throttle groove communicates with first opening, the throttle groove is inwards sunken from the outer peripheral face of case, the throttle groove extends along the outer peripheral face of case from first opening, first opening and second opening are at the axial of case setting of staggering, enough space has been reserved for the throttle groove like this, make the throttle groove can the great range cover the case outer peripheral face, under the same circumstances of through case flow, the shared case circumference angle of throttle groove is big more, along throttle groove length direction, the throttle area change of throttle groove is gentler, the motorised valve flow curve linearity that corresponds with the case is better, be favorable to improving motorised valve control accuracy.

Drawings

Figure 1 is a schematic perspective view of a first embodiment of an electrically operated valve;

figure 2 is a schematic cross-sectional view of the electrically operated valve of figure 1;

FIG. 3 is a cross-sectional structural view of the valve body of FIG. 2;

FIG. 4 is a schematic view of an angular perspective of the valve cartridge of FIG. 2;

FIG. 5 is a side view angle schematic of the valve cartridge of FIG. 2;

FIG. 6 is a schematic view of the main angle configuration of the valve cartridge of FIG. 2;

FIG. 7 isbase:Sub>A schematic cross-sectional view of the valve cartridge of FIG. 6 taken along the line A-A;

FIG. 8 is a schematic cross-sectional view of the valve cartridge of FIG. 6 taken along the direction B-B;

FIG. 9 is a cross-sectional view of the first detent shown in FIG. 2;

figure 10 is a cross-sectional view of the second locator portion of figure 2;

FIG. 11 is a perspective view of the first valve seat of FIG. 2;

FIG. 12 is a schematic illustration of the assembly of the valve cartridge and valve body of FIG. 2;

figure 13 is a schematic view of the first opening portion of the first embodiment of the electrically operated valve in communication;

figure 14 is a schematic cross-sectional view of the electrically operated valve of figure 13 taken along the direction C-C;

figure 15 is a schematic cross-sectional view of the electrically operated valve of figure 13 taken along line D-D (the valve body is not shown);

figure 16 is a schematic cross-sectional view of a second embodiment of an electrically operated valve;

FIG. 17 is a perspective view of a second embodiment of the first valve seat.

Detailed Description

The invention is further described with reference to the following figures and specific examples:

the electric valve can be applied to a vehicle thermal management system or an air conditioning system, and particularly can be applied to a circulating flow path of high-pressure fluid such as refrigerant and the like, wherein the vehicle thermal management system comprises a new energy vehicle thermal management system. Referring to fig. 1-15, an electric valve is an embodiment of the electric valve of the present invention, and in this embodiment, the electric valve can be applied to a refrigerant circulation flow path. The electric valve 100 includes a control device 1, a valve body assembly 2, and a valve core 4, wherein the valve body assembly 2 has a valve body cavity 210, and the valve core 4 is located in the valve body cavity 210. The control device 1 comprises an output shaft 11, the output shaft 11 outputs torque, the output shaft 11 is in transmission connection with the valve core 4, the control device 1 is fixedly connected with the valve body assembly 2, and the electric valve 100 is electrically connected and/or in signal connection with the outside through the control device 1.

Referring to fig. 2 and 3, the valve body assembly 2 includes a valve body 21, a valve body chamber 210 is located in the valve body 21, and the valve body 21 further includes an opening portion 213 and at least two flow portions. The opening portion 213 forms an opening chamber 2130, and the opening chamber 2130 is located closer to the control device 1 than the valve body chamber 210 in the direction of the axis OO' of the electric valve (hereinafter referred to as the electric valve axial direction). In the case of a single component of the valve body 21, the opening chamber 2130 communicates with the valve body chamber 210, and part of the control device 1 is located in the opening chamber 2130. In the present embodiment, the valve body 21 includes two flow portions, a first flow portion 211 and a second flow portion 212. The first flow portion 211 has a first passage 2111 and a first orifice 2112, the first orifice 2112 being located in the outer wall surface of the valve body 21, the first passage 2111 being located inside the valve body 21, the first orifice 2112 communicating with the first passage 2111. The second flow passage 212 has a second passage 2121 and a second orifice 2122, the second orifice 2122 is located on the outer wall surface of the valve body 21, the second orifice 2122 and the first orifice 2112 are respectively located on two oppositely disposed outer wall surfaces of the valve body 21, one of the first passage 2111 and the second passage 2121 may serve as an inlet passage of the electric valve, the other may serve as an outlet passage, and correspondingly, one of the first orifice 2112 and the second orifice 2122 serves as an inlet of the electric valve, and the other serves as an outlet of the electric valve. The valve body cavity 210 is located between the first passage 2111 and the second passage 2121, and in a state where the valve core 4 is not installed, referring to fig. 3, for only a single component of the valve body 21, the first passage 2111 and the second passage 2121 communicate through the valve body cavity 210, the first passage 2111 and the second passage 2121 are respectively located on different sides of the valve body cavity 210, the first passage 2111 is closer to the control device 1 than the second passage 2121 along the axial direction of the electric valve, the first passage 2111 and the second passage 2121 are axially staggered, and the first passage 2111 and the second passage 2121 are axially staggered

The height difference h1 is formed between the two parts, and the inlet channel and the outlet channel are not at the same height due to the height difference h1, so that the design of the valve core is facilitated. When the height difference h1 is too large, a large pressure drop loss is generated when the high-pressure refrigerant flows through, so that the height difference is not suitable to be too large. The height difference between the first channel 2111 and the second channel 2121 herein refers to the height difference between the centerline of the first channel 2121 and the centerline of the second channel 2121.

The valve core 4 has various forms, and can be spherical, needle-shaped, cylindrical and the like. Referring to fig. 2 and 4-8, in the embodiment, the valve core 4 is substantially cylindrical, that is, the valve core 4 is specifically a valve core column, and the corresponding electric valve is specifically an electric column valve. The axis of the valve core 4 substantially coincides with the axis of the electric valve 100, the valve core 4 includes a first opening 410, a second opening 420, and an orifice 430, the first opening 410 is closer to the control device 1 than the second opening 420 along the axial direction of the electric valve, the central axis of the first opening 410 and the central axis of the second opening 420 similarly have a height difference h1, with reference to the direction shown in fig. 2, the first opening 410 and the second opening 420 are arranged in a staggered manner along the axial direction of the valve core, the second opening 420 is completely below the first opening 410, and the first opening and the second opening have a gap h2 along the axial direction of the valve core, the gap h2 is larger than the width of a sealing area for sealing the first opening or the second opening, specifically, the gap h2 between the lower end of the first opening 410 and the upper end of the second opening 420 in the present embodiment, and the gap h2 is at least larger than the width h3 of the sealing area for sealing the first opening 410, which can be arranged to make the first opening 410 and the second opening 420 not be located on the same circumference of the valve core, which is beneficial to reducing the diameter of the valve core 4 and reducing the radial size of the valve body, and at the enough to be a throttling groove of the valve core. In this embodiment, the first opening 410 and the second opening 420 are both located on the outer peripheral surface 40 of the valve core 4, the port 430 is located inside the valve core 4, the port 430 is partially arranged along the axial direction of the valve core, so that the valve core is at least partially hollow, and the port 430 communicates with the first opening 410 and the second opening 420. The second opening 410 may be a through hole with a larger diameter or a plurality of through holes with smaller diameters, and in the embodiment, the second opening 420 includes a plurality of first through holes 420a, and the plurality of first through holes 420a are uniformly distributed along the outer circumferential surface 40 of the valve core 4. The second opening 420 is communicated with the second passage 2121, the central axis of the first opening 410 is basically coincident with the central axis of the first passage 2111, the first opening 410 and the first passage 2111 can be completely communicated or partially communicated or not communicated by rotating the valve core 4, and the second opening 420 is always in an open state no matter where the valve core 4 is located, so that the pressure drop loss of refrigerant flowing through the valve core is reduced. The second port 2122 may be an inlet of the electric valve, the first port 2112 may be an outlet of the electric valve, the refrigerant enters from the second port 2122, flows through the second passage 2121, and enters the orifice 430 inside the valve core 4 from the second opening 420, the control device 1 rotates the valve core 4 through the output shaft 11, so that the first opening 410 is at least partially communicated with the first passage 2111, and the refrigerant can leave the valve core from the first opening 410 and leave the electric valve 100 from the first port 2112 through the first passage 2111. When the first opening 410 is not communicated with the first passage 2111 completely, i.e. when the electric valve is closed, the refrigerant filled in the orifice 430 of the valve core 4 cannot exit from the first opening 410. It will be appreciated that the second port 2122 may also serve as an outlet of the electrically operated valve and the corresponding first port 2112 serves as an inlet of the electrically operated valve.

In addition, the valve core 4 further has a throttle groove 440, the throttle groove 440 is recessed inward from the outer peripheral surface of the valve core 4, the throttle groove 440 is communicated with the first opening 410, specifically, the throttle groove 440 extends from the first opening 410 end of the valve core 4 along the valve core outer peripheral surface 40, and the second opening 420 end is always in a normally open state, so that the throttle groove is not required to be provided. The cross-sectional shape of the throttle groove 440 along the axial direction of the valve element may be V-shaped, rectangular or other shapes, in this embodiment, the cross-sectional shape of the throttle groove 440 along the axial direction of the valve element is V-shaped, the throttle groove 440 has a head end 441 and a tail end 442, the head end 441 is located on the outer circumference forming the first opening 410, from the head end 441 to the tail end 442, the groove width of the throttle groove 440 gradually decreases, and the groove depth of the throttle groove 440 gradually decreases. Here, the groove width refers to the width of the throttle groove in the axial direction of the valve element, and the groove depth refers to the depth of the throttle groove in the radial direction of the valve element. As shown in fig. 8, fig. 8 is a cross section 480 of the valve element perpendicular to the valve element axis, and since the first opening 410 and the second opening 420 are arranged in a staggered manner in the axial direction of the valve element 4, based on the circumference of the valve element where the center of the first opening 410 is located, except for the first opening 410 and the sealing area required for the fully-closed state, the circumferences of the remaining valve elements 4 can be used as areas for forming the throttling groove, for example, 90 ° is reserved for the first opening 410 and the sealing area required for the fully-closed state, so that the covering angle of the throttling groove 440 on the circumference of the valve element 4 can reach 270 °, based on the outer circumferential surface 40 of the valve element 4 for forming the throttling groove 440, that is, based on the line between the first end 441 of the throttling groove 440 and the center of the cross section 480 and the line between the tail end 442 of the throttling groove 440 and the center of the cross section 480, an included angle α in this embodiment may reach 100-270 °, and is specifically 138 °. The projection of the groove bottom of the throttling groove 440 on the cross section 480 perpendicular to the axis of the valve core is a part of a spiral line, namely, the throttling groove 440 is in the direction of the spiral line, which is beneficial to the smoothness and uniformity of the flow curve of the electric valve. Under the condition that the flow of the electric valve is the same, the larger the angle of the throttle groove 440 occupied on the outer peripheral surface of the valve core is, the more gradual the change of the throttle area of the throttle groove is along the length direction of the throttle groove, the better the linearity of the flow curve of the electric valve is, the easier the accurate control can be realized through software, and the control precision can be improved. In addition, referring to fig. 5, the groove edge of the throttle groove 440 has an angle β with the center line of the throttle groove 440, and the angle β is within 0 to 30 °. Generally, the smaller the beta included angle is, the thinner the throttle groove 440 is, the more gradual the change of the throttle area of the throttle groove is along the length direction of the throttle groove, and the better the linearity of the electric valve flow curve is, which is beneficial to improving the control precision; when the slot edge of the throttle slot 440 is an arc, the included angle β is the angle between the tangent of the slot edge and the centerline of the throttle slot 440. The V-shaped throttling groove is compared with a rectangular throttling groove, so that the cutter processing is more convenient, the burr treatment on the groove edge of the throttling groove is simpler, the friction loss of the valve core and the sealing assembly can be reduced, and the service life of the electric valve is prolonged.

The electric valve 100 shown in fig. 2 is fully open, the first opening 410 is in full communication with the first passage 2111, and refrigerant enters the second port 2122, passes through the second passage 2121, the second opening 420, the orifice 430, the first opening 410, the first passage 2111, and exits the electric valve 100 from the first port 2112. Referring to fig. 13-15, fig. 13-15 are schematic views of the electric valve 100 partially opened, wherein at least a portion of the throttling groove 440 is in communication with the first passage 2111, and refrigerant entering the orifice 430 can flow along the throttling groove 440 into the first passage 2111 and then exit the electric valve 100 through the first port 2112, wherein the throttling groove 440 performs a throttling expansion function. In the embodiment, a two-way valve is provided, and it can be understood that the electric valve can also be applied to a three-way or multi-way valve in an expanded way.

Referring to fig. 2 and 3, the electric valve 100 further includes a first positioning portion 22 and a second positioning portion 23, in the axial direction of the electric valve, the first positioning portion 22 is located on a side of the valve core 4 relatively far away from the control device 1, and the second positioning portion 23 is located on a side of the valve core 4 relatively close to the control device 1. The valve body 21 has a first mounting groove 220, the first mounting groove 220 is close to the bottom of the valve body cavity 210, the first mounting groove 220 opens to the control device 1, and a part of the first positioning portion 22 is located in the first mounting groove 220. As shown in fig. 9, the cross section of the first positioning portion 22 in the axial direction of the electric valve is substantially convex, and the central axis of the first positioning portion 22 coincides with or tends to coincide with the central axis of the valve body cavity 210, for example, it can be considered that the central axis of the first positioning portion 22 coincides with the central axis of the valve body cavity 210 when the offset between the central axis of the first positioning portion 22 and the central axis of the valve body cavity 210 is less than 0.02 mm. The first positioning portion 22 includes a first flange portion 222 and a first body portion 221, the first flange portion 222 extends radially outward from the first body portion 222 along the first positioning portion, a lower end surface of the first flange portion 222 abuts against a groove bottom wall forming the first mounting groove 220, an outer peripheral wall of the first flange portion 222 abuts against a groove side wall forming the first mounting groove 220, and the first positioning portion 22 is in interference fit with a groove wall forming the first mounting groove 220. The first positioning portion 22 has a second through hole 223, and the second through hole 223 is disposed along the axial direction of the first positioning portion 22 and penetrates the first positioning portion 22. The first positioning portion 22 further has a concave portion 224, and the concave portion 224 is formed by being depressed inward from the lower end surface of the first flange portion 222, with the direction shown in fig. 2 defined as the up-down direction. The first positioning portion 22 is press-fitted into the first mounting groove 220 from the open cavity 2130, the first positioning portion 22 is interference-fitted to the valve body 21, and the concave portion 224 provided at the lower end portion of the first flange portion 222 can reduce the contact surface area between the first positioning portion 22 and the valve body 21, which is small in contact surface and easy to ensure the flatness of the first positioning portion, thereby facilitating the ensuring of the coaxiality of the first positioning portion 22 and the valve body cavity 210; the second through hole 223 is provided to facilitate the discharge of gas in the first mounting groove 220 when the first positioning portion 22 is mounted in the valve body. In addition, in order to facilitate the assembly of the first positioning portion 22 and the valve body 21, a chamfered portion may be provided at the lower end of the first positioning portion 22, the chamfer of the chamfered portion being 30 ° or less. Defining one end of the valve core 4 relatively far from the control device 1 as a first end 41, one end of the valve core 4 relatively close to the control device 1 as a second end 42, and the first end 41 of the valve core has a positioning structure corresponding to the first positioning portion 22, one possible installation structure is shown in fig. 2 and 7, a hole 430 of the valve core 4 axially penetrates through the first end 41 of the valve core 4 along the valve core, part of the first main body portion 23 is located in the valve core 4, the first main body portion 23 of the first positioning portion 22 can be inserted into the first end 41 of the valve core 4 for positioning, a clearance fit is formed between the outer peripheral surface 40 of the valve core 4 and the first flange portion 221, of course, a sliding fit can also be formed between the outer peripheral surface 40 of the valve core 4 and the first main body portion 221, so that the valve core 4 can rotate in the circumferential direction conveniently, and the end surface 411 of the first end 41 of the valve core 4 abuts against the first flange portion 222. As another embodiment, the hole does not penetrate through the first end of the valve core, and a positioning groove for engaging with the first positioning portion may be additionally provided at the first end of the valve core.

Referring to fig. 10, the second positioning portion 23 includes a second main body portion 231 and a second flange portion 232, the second flange portion 232 extends from the second main body portion 231 along the second positioning portion 23 in a radial direction, and at least a portion of the second main body portion 231 is closer to the first positioning portion 22 than the second flange portion 232 in an axial direction of the electric valve. The central axis of the second positioning portion 23 coincides with or tends to coincide with the central axis of the valve body chamber 210, and for example, it can be considered that the central axis of the second positioning portion 23 tends to coincide with the central axis of the valve body chamber 210 with an allowable offset of less than 0.02mm from the central axis of the valve body chamber 23. The second positioning portion 23 has a third through hole 233, the second end 42 of the valve core 4 is at least partially located in the third through hole 233, and there is also a clearance fit between the second positioning portion 23 and the outer peripheral surface 40 of the valve column 4, that is, the inner diameter of the third through hole 233 is slightly larger than the outer diameter of the corresponding valve column 4, so that there is a certain clearance, for example, a clearance of 0 to 0.02mm, between the inner wall of the second positioning portion 23 and the outer wall of the valve column 4, and the clearance can enable the valve core 4 to rotate in the circumferential direction without being obstructed, and certainly, there may also be a sliding fit between the second positioning portion 23 and the outer peripheral surface 40 of the valve column 4. The valve body 21 has a first step portion 214, the first step portion 214 is located at the upper end of the valve body chamber 210, and the first step portion 214 is closer to the control device 1 than the valve body chamber 210; the valve core 4 has a second step portion 450, the second step portion 450 is located on one side of the second positioning portion 23 relatively far away from the control device 1, a step surface of the second step portion 450 is arranged opposite to a lower end surface of the second positioning portion 23 and has a certain gap, the second positioning portion 23 can axially limit the upward movement of the valve core, and the valve core 4 cannot move upward any more after being moved upward at most to abut against the second positioning portion 23. After the valve body 4 is assembled with the first positioning portion 22, the second positioning portion 23 is press-fitted into the valve body cavity 210 from the opening cavity 2130 until it abuts against the first stepped portion 214. Because high-pressure fluid such as refrigerant has higher pressure, and the high-pressure fluid can directly or indirectly apply pressure to the valve core when flowing through the valve core, the valve core is likely to incline or float up and down under the action of the pressure, and the situation that the valve core is directly clamped by a sealing assembly or the valve core cannot be driven by an output shaft to rotate is likely to occur, so that the stability of the electric valve is affected. It is to be understood that, as other embodiments, the first positioning portion and the second positioning portion are not limited to the forms shown in the drawings, for example, the first positioning portion may be in the form of a groove, and a protrusion corresponding to the valve core is provided to cooperate with the first positioning portion.

Referring to fig. 2 and 11, the electric valve 100 further includes a sealing assembly 5, the sealing assembly 5 includes a first valve seat 51 and a first sealing member 52, and referring to fig. 11, the first valve seat 51 includes an arc surface 511 and a third flange portion 512, the third flange portion 512 extends outward from the main body portion of the first valve seat 51 along the radial direction of the valve body cavity, the first sealing member 52 is sleeved on the radial periphery of the third flange portion 512, along the radial direction of the valve body cavity 210, the arc surface 511 and the third flange portion 512 are located at two ends of the first valve seat 51, the arc surface 511 is formed by inward recessing from the main body portion of the first valve seat 51, and at least a part of the arc surface 511 is attached to the outer peripheral surface 40 of the valve element 4. The first valve seat 51 further has a fourth through hole 513, the fourth through hole 513 is provided through the first valve seat 51 in the radial direction of the valve body chamber, and the fourth through hole 513 is communicated with the first passage 2111.

The valve body 21 has a first recess 215, the first recess 215 defining a first cavity 2150, the first cavity 2150 being part of the valve body cavity 210, the first cavity 2150 being located on a side of the valve body cavity 210 adjacent the first passage 2111, the first cavity 2150 communicating with the first passage 2111, and at least a portion of the seal assembly 5 being located in the first cavity 2150. When viewed from the radial direction of the valve body cavity 210, the sealing assembly 5 is located on one side of the valve core 4 close to the first channel 2111, the arc-shaped surface 511 of the first valve seat 51 is at least partially attached to the outer peripheral surface 40 of the valve core 4, the arc-shaped surface 511 is attached to the outer peripheral surface 40 of the valve core 4, namely a sealing area, the diameter of the sealing area generally needs to be 3-5mm larger than that of the first opening 420, so that a good sealing effect is ensured, and the valve core 4 can be in sliding fit with the arc-shaped surface 511. Along the radial direction of the valve body cavity 210, the first sealing element 52 is compressed between the first concave part 215 and the first valve seat 51, the first sealing element 52 is in a sealing and compressing state, and the first sealing element 52 generates a certain pressure to the valve core 4, and the pressure is beneficial to enhancing the sealing between the first valve seat 51 and the valve core 4. The width h3 of the aforementioned sealing region for sealing the first opening 410 is the width of the arc-shaped face 511 of the first valve seat.

The electric valve 100 further comprises an elastic assembly including a second valve seat 61 and an elastic member 62, the second valve seat 61 and the first valve seat 51 are symmetrically disposed about the central axis of the valve element 4, and the elastic member 62 and the first sealing member 52 are symmetrically disposed about the central axis of the valve element 4. The valve body 21 has a second recess 216, the second recess 216 forming a second cavity 2160, the second cavity 2160 being a part of the valve body chamber 210, the second cavity 2160 being located at a side of the valve body chamber 210 remote from the first passage 2111, the second valve seat 61 and the elastic member 62 being located at the second cavity 2160, the elastic member 62 being compressed between the second recess 216 and the second valve seat 61. The elastic member 62 and the second valve seat 61 play a role in balancing the pressure of the sealing assembly 5 on the valve element 4, so as to be beneficial to the force balance on two sides of the valve element 4, and for convenience in production and assembly, the structure of the second valve seat 61 is the same as that of the first valve seat 51, and the elastic member 62 is the same as that of the first sealing element 52, and may be an O-ring, for example. In this embodiment, the peripheral side of the first opening 410 is sealed to prevent the refrigerant from leaving the valve body 21 from the first opening 410 through the first passage 2111 and the first orifice 2112 when the electrically operated valve is fully closed, and the difficulty in machining and manufacturing the valve element 4 can be reduced by only increasing the machining and manufacturing accuracy of the valve element on the side of the first opening without providing a sealing structure between the peripheral side of the second opening 420 and the second passage 2121. In addition, compared with a spherical valve core, the contact area between the cylindrical valve core and the valve seat is relatively reduced, and the driving force required by the control device is favorably reduced. The sealing assembly and the elastic assembly can support the valve core in the circumferential direction, the first sealing element and the elastic element provide holding force for the valve core to enable the valve core to be limited between the sealing assembly and the elastic assembly, and the valve core is in sliding fit with the first valve seat and the second valve seat, so that the possibility of inclination or excessive deviation of the valve core is reduced, and the coaxiality of the valve core and a valve body cavity is ensured.

Referring to fig. 5 and 12, in order to facilitate the installation of the valve element 4, the valve element 4 has a positioning portion 460, the positioning portion 460 is located at the first end 41 of the valve element 4, such as the lower end of fig. 5, the diameter of the positioning portion 460 tends to decrease gradually along the direction away from the second end 42 of the valve element 4, at least a part of the diameter D1 of the positioning portion 460 is smaller than the radial distance D2 between the first valve seat 51 and the second valve seat 61 when the valve element 4 is not installed, and the first sealing element 52 and the elastic element 62 are in an uncompressed state. The arrangement of the position placing part is beneficial to the valve core to pass through the area between the sealing component and the elastic component, and the position placing part also has the function of correcting the positions of the first valve seat and the second valve seat, so that the mass assembly of products is facilitated. The valve core 4 further has a plug-in cavity 470, the plug-in cavity 470 is located at the second end 42 of the valve core 4, and the first opening 410 is located between the seating portion 460 and the plug-in cavity 470 and the throttle groove 440 is also located between the seating portion 460 and the plug-in cavity 470 along the axial direction of the valve core 4.

The control device 1 further comprises a driving part and a transmission mechanism 14, the driving part comprises a rotor assembly 12 and a stator assembly 13, the stator assembly 13 is located on the periphery of the rotor assembly 12, the stator assembly 13 is electrically connected and/or in signal connection with a circuit board, the circuit board can be arranged in the control device, the circuit board also can not be located in the control device, the circuit board of the embodiment is not located in the control device, and the circuit board structure is not shown in the corresponding drawing. The rotor assembly 12 has a rotor cavity 120, at least a portion of the transmission 14 is located in the rotor cavity 120, and at least a portion of the transmission 14 is located in the rotor cavity 120, which facilitates reducing the axial height of the electric valve. After the stator assembly 13 is powered on, the stator assembly 13 generates an excitation magnetic field, the rotor assembly 12 drives the transmission mechanism 14 to rotate under the excitation of magnetic force, the transmission mechanism 14 drives the output shaft 11 to rotate, the output shaft 11 is in clearance fit with the valve core 4, the end part of the output shaft 11 is located in the insertion cavity 470 at the second end 42 of the valve core 4, and a certain clearance is reserved between the end part and the cavity wall forming the insertion cavity 470, the output shaft 11 rotates to drive the valve core 4 to rotate, so that the first opening 410 is partially or completely communicated or not communicated with the first channel 2111, when the first opening 410 is partially or completely communicated with the first channel 2111, the throttling groove 440 is communicated with the first channel 2111, when the first opening 410 is not communicated with the first channel 2111, the throttling groove 211440 is not communicated with the first channel 2111, and the flow control and on-off adjustment of the electric valve are realized. The structure of the control device is various and is not limited to the structure given in the embodiment, and other control devices capable of driving the output shaft to move can be used as references; the transmission connection between the output shaft and the valve core can be in modes of clearance fit, interference fit and the like, and the output shaft can drive the valve core to rotate.

Referring to fig. 2, the control device 1 further includes a connecting seat 15, and a central axis of the connecting seat 15 is coincident with or tends to be coincident with a central axis of the valve core chamber 210. The connecting seat 15 has a receiving cavity 150, a part of the transmission mechanism 14 is positioned in the receiving cavity 150, and the connecting seat 15 is fixedly connected with the valve body assembly 2. The connecting socket 15 has a fourth flange portion 151, the fourth flange portion 151 extends outward from a main body portion of the connecting socket 15 in a radial direction of the connecting socket 15, the connecting socket 15 has a hole portion 152, the hole portion 152 is located in a middle portion of the connecting socket 15 and axially penetrates through the connecting socket 15, a central axis of the hole portion 152 axially coincides with or tends to coincide with a center of the connecting socket 15, at least a portion of the output shaft 11 is located in the hole portion 152, and another portion of the output shaft 11 is located in the insertion cavity 470 of the valve element 4. The electric valve further comprises a compression nut 7, the compression nut 7 is sleeved on the radial periphery of the side wall of the main body part of the connecting seat 15, the compression nut 7 is abutted to one end face of the fourth flange part 151, and the compression nut 7 is in threaded connection with the valve body assembly 2, so that the connecting seat 15 is fixedly connected with the valve body assembly 2. Further, a sealing member is arranged between the connecting seat 15 and the valve body assembly 2, so that the refrigerant is prevented from leaking out of an assembly gap between the connecting seat 15 and the valve body assembly 2. Referring to fig. 3, the valve body assembly 2 further includes a positioning post 24, and the positioning post 24 is in positioning fit with the connecting seat 15. The central axis of the connecting seat 15 coincides with or tends to coincide with the central axis of the valve core cavity 210, the central axis of the hole portion 152 coincides with or tends to coincide with the central axis of the connecting seat 15, the output shaft 11 penetrates through the hole portion 152 to be in transmission connection with the valve core 4, the coaxiality of the output shaft 11 and the valve body cavity 210 is guaranteed beneficially through the connecting seat 15, further, the coaxiality of the valve core 5 and the valve body cavity 210 is guaranteed beneficially through the first positioning portion 22 and the second positioning portion 23, and therefore the coaxiality of the output shaft 11 and the valve core 4 can be well guaranteed.

The present embodiment further provides an assembling method of a valve element, including:

the first positioning part 22 and the valve body 21 are pressed in an interference fit mode: the first positioning portion 22 is pressed downward from the opening chamber 2130 in the upper portion of the valve body 21 into the first mounting groove 220 in the bottom of the valve body chamber 210.

Assembly of the sealing assembly 5, the elastic assembly and the valve body 21: the first sealing element 52 is sleeved at the third flange part 512 of the first valve seat 51 to form a sealing assembly 5, and the sealing assembly 5 is pressed into the first concave part 215 of the valve body 21 from the opening cavity 2130 at the upper part of the valve body; the elastic element 62 is sleeved on the flange part of the second valve seat 61 to form an elastic component, and the elastic component is pressed into the second concave part 216 of the valve body 21 from the opening cavity 2130; the assembly sequence of the sealing component and the elastic component can be changed.

Installation of the valve core 4: the valve core 4 is inserted into the valve body cavity 210 from the opening cavity 2130 at the upper part of the valve body, so that the first end 41 of the valve core 4 is in limit fit with the first positioning part 22 and the valve core 4 is pressed and limited by the sealing component and the elastic component in the radial direction of the valve body cavity;

mounting of the second positioning portion 23: the second positioning portion 23 is press-fitted from the opening chamber 2130 of the upper portion of the valve body to abut against the first stepped portion 214 of the valve body 21, and the second end 42 of the valve body 4 is positioned by the second positioning portion 23.

After the valve body assembly 2, the sealing assembly 5, the elastic assembly and the valve core 4 are assembled, the valve body assembly 2 presses in a positioning column 24 and a sealing element for preventing leakage, a rotor assembly 12, a transmission mechanism 14, a connecting seat 15 and an output shaft 11 in the control device 1 are assembled to form a valve component, the valve component is installed in the valve body 21 from an opening cavity 2130 on the upper portion of the valve body, the output shaft 11 is inserted into a splicing cavity 470 of the valve core 4, a compression nut 7 is screwed in, the valve component is fixed with the valve body assembly 2 through the compression nut 7, then a stator assembly 13 is pressed in from the upper portion of a rotor assembly 23 downwards and is fixed with the valve body assembly 2 through a screw, and the assembly of the electric valve is completed.

Referring to fig. 16, fig. 16 is another embodiment of the electric valve of the present application, the first opening 410 is still located on the outer peripheral surface 40 of the second end 42 of the valve element 4, and different from the previous embodiment, the second opening 420 of the valve element 4 in this embodiment is located on the end surface 411 of the first end 41 of the valve element 4 instead of on the outer peripheral surface 40 of the valve element 4, that is, the duct 430 is arranged to penetrate the first end 41 of the valve element 4 along the axial direction of the valve element, there is no need to provide a first through hole on the outer peripheral surface 40 of the valve element 4, the corresponding second channel 2121 and the first channel 2111 of the valve body 41 are not arranged in parallel, the second channel and the first channel 2111 of the valve body 41 are arranged at an angle of approximately 90 °, and the first channel 2112 and the second channel 2122 are located on the adjacent outer wall surface of the valve body 41. The structure of the first positioning portion 22 is adjusted due to the position change of the second opening 420, and the first positioning portion 22 also has the second through hole 223, but the diameter of the second through hole 223 is larger than that of the second through hole shown in fig. 2 and 9, and here, the second through hole 223 is used to communicate the second opening 420 with the second passage 2121, so that a larger diameter is required. The first positioning portion 22 has a third stepped portion 225, the third stepped portion 225 is used to limit the position of the first end 41 of the valve body 4, an end surface 411 of the first end 41 of the valve body 4 abuts against the third stepped portion 225, and the outer peripheral surface 40 of the first end 41 of the valve body 4 is at least partially positioned in the first positioning portion 22. The valve body 41 is provided with a fourth stepped portion 217 for restricting the mounting of the first positioning portion 22, and the first positioning portion 22 is at least partially in contact with the fourth stepped portion 217.

Referring to fig. 17, fig. 17 is a second embodiment of the first valve seat 51, and is different from the first valve seat shown in fig. 11, in this embodiment, a circle of annular protrusion 514 is further provided on an arc-shaped surface of the first valve seat 51, when the first opening is fully closed, the annular protrusion 514 abuts against an outer peripheral surface of the valve element, and the annular protrusion 514 changes a surface seal with a wider contact surface into a line seal or a surface seal with a smaller contact surface, which is beneficial to enhancing a sealing effect between the valve element and the first valve seat and preventing fluid from leaking outside.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified or substituted by equivalents, and all technical solutions and modifications which do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims (10)

1. A valve core, the valve core is cylindrical, the valve core is provided with a first opening, a second opening and a pore passage, and the valve core is characterized in that: the first opening is located on the outer peripheral surface of the valve core, the second opening is located on the outer peripheral surface of the valve core or the end surface of the valve core, the first opening and the second opening are arranged in a staggered mode in the axial direction of the valve core, the pore channel is located inside the valve core and communicated with the first opening and the second opening, the valve core is further provided with a throttling groove, the throttling groove is communicated with the first opening, the throttling groove is inwards recessed from the outer peripheral surface of the valve core, and the throttling groove extends from the first opening end along the outer peripheral surface of the valve core.

2. The valve cartridge of claim 1, wherein: the throttling groove is provided with a head end and a tail end, the head end is positioned on the outer circumference forming the first opening, the groove width of the throttling groove is gradually reduced from the head end to the tail end, and the groove depth of the throttling groove is gradually reduced.

3. The valve cartridge of claim 1 or 2, wherein: the cross section of the throttling groove along the axial direction of the valve core is V-shaped, the projection of the groove bottom of the throttling groove on the cross section vertical to the axial line of the valve core is a part of a spiral line, and the included angle between the connecting line of the head end of the throttling groove and the circle center of the cross section and the connecting line of the tail end of the throttling groove and the circle center of the cross section is 100-270 degrees; the included angle between the groove edge of the throttling groove and the central line of the throttling groove is 0-30 degrees.

4. The valve cartridge of claim 3, wherein: the valve core is also provided with a position entering part, the valve core is provided with a first end and a second end, the position entering part is positioned at the first end of the valve core, and the diameter of the position entering part is gradually reduced along the direction far away from the second end of the valve core; the valve core is also provided with an inserting cavity, the inserting cavity is positioned at the second end of the valve core, the first opening is positioned between the approach part and the inserting cavity along the axial direction of the valve core, and the throttling groove is also positioned between the approach part and the inserting cavity.

5. The valve cartridge according to any one of claims 1 to 4, wherein: the second opening is located on the outer peripheral surface of the valve core, the second opening comprises a plurality of first through holes, the first through holes are uniformly distributed along the outer peripheral surface of the valve core, and a gap is formed between the first opening and the second opening along the axial direction of the valve core and is larger than the width of a sealing area for sealing the first opening or the second opening.

6. The valve cartridge according to any one of claims 1 to 4, wherein: the second opening is positioned on the end surface of the first end of the valve core, the first opening is positioned on the peripheral surface of the second end of the valve core, and the pore canal is at least partially arranged along the axial direction of the valve core and is communicated with the first opening and the second opening; the first opening and the second opening have a clearance in the spool axis direction, the clearance being larger than a width of a seal area for sealing the first opening or the second opening.

7. An electrically operated valve, includes controlling means, valve body subassembly and case, the valve body subassembly includes the valve body, the valve body has the valve body chamber, the case is located the valve body chamber, controlling means has the output shaft, the output shaft with the case transmission is connected, controlling means with valve body subassembly fixed connection, its characterized in that: the valve element according to any one of claims 1 to 6, wherein the valve body includes a first communicating portion and a second communicating portion, the second communicating portion communicates with the second opening, the first communicating portion and the first opening can be communicated or not communicated by rotating the valve element, and the throttle groove can be communicated or not communicated with the first communicating portion.

8. An electrically operated valve as claimed in claim 7, wherein: the electric valve comprises a sealing assembly, the sealing assembly comprises a first valve seat and a first sealing piece, the first valve seat comprises an arc-shaped surface and a fourth through hole, at least part of the arc-shaped surface is attached to the peripheral surface of the valve core, the fourth through hole penetrates through the first valve seat along the radial direction, the valve body is provided with a first concave portion, the first concave portion is located on one side, close to the first circulation portion, of the valve body cavity, the fourth through hole is communicated with the first circulation portion, the first sealing piece and the first valve seat are located in the first concave cavity, the first sealing piece is pressed between the valve body and the first valve seat, the first valve seat is in sliding fit with the valve core, and the gap between the first opening and the second opening is larger than the width of the first valve seat along the axial direction of the valve body cavity.

9. An electrically operated valve as claimed in claim 8, wherein: the electric valve further comprises an elastic assembly, the elastic assembly comprises a second valve seat and an elastic piece, the second valve seat and the first valve seat are symmetrically arranged about the central axis of the valve core, the elastic piece and a first sealing piece are symmetrically arranged about the central axis of the valve core, the valve body is provided with a second concave part, the second concave part is positioned on one side of the valve body cavity away from the first flowing part, the elastic assembly is positioned in the second concave part, the elastic piece is compressed between the second valve seat and the valve body, and the valve core is limited by the sealing assembly and the elastic piece; the diameter of the seating portion is smaller than the radial distance between the first valve seat and the second valve seat when the elastic member and the first seal member are not compressed.

10. An electrically operated valve as claimed in claim 9, wherein: the electrically operated valve further comprises a first positioning part and a second positioning part, the first positioning part is positioned on one side of the valve core relatively far away from the control device along the axial direction of the valve body cavity, the second positioning part is positioned on one side of the valve core relatively close to the control device, the central axis of the first positioning part is coincided with or tends to be coincided with the central axis of the valve body cavity, one end of the valve core relatively far away from the control device is a first end, one end of the valve core relatively close to the control device is a second end, the end surface of the first end of the valve core is abutted against the first positioning part, and the outer peripheral surface of the valve core is in clearance fit with the first positioning part; the central axis of the second positioning part coincides with or tends to coincide with the central axis of the valve body cavity, the second positioning part is in clearance fit with the valve core along the axial direction of the electric valve, and the second positioning part is in clearance fit with the peripheral surface of the valve core.

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