Valve seat and electromagnetic valve

Abstract

Disclosed is a valve seat (10), comprising a first channel (100) and a second channel (200). One end of the first channel (100) is provided with a first hole for connecting a first outlet pipe (12), and the other end of the first channel (100) is provided with a second hole for communicating with an inner cavity of a valve; on a plane perpendicular to the axis of the first hole, the projection of the second hole falls within the projection of the first hole; one end of the second channel (200) is provided with a third hole for connecting a second outlet pipe (13), and the other end of the second channel (200) is provided with a fourth hole for communicating with the inner cavity of the valve; on a second plane perpendicular to the axis of the third hole, the projection of the fourth hole falls within the projection of the third hole, wherein the minimum distance between the hole wall of the second hole and the hole wall of the fourth hole is equal to the minimum distance between the hole wall of the first hole and the hole wall of the third hole. According to the valve seat, switching between larger flow channels can be implemented by means of smaller pulling force and shorter strokes. Also disclosed is an electromagnetic valve using the valve seat.

Description

Valve seat and solenoid valve

[0001] Cross-references

[0002] This disclosure claims priority to Chinese Patent Publication No. 202410338083.9, filed on March 22, 2024, entitled “Solenoid Valve” and Chinese Patent Publication No. 202420574808.X, entitled “Valve Seat and Valve”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of valves, and in particular, to a valve seat and a solenoid valve. Background Art

[0004] A switching valve is a control device used in refrigeration equipment. In related art, switching valves primarily use a slider to slide between valve ports to switch flow channels. However, the slider's long sliding stroke during flow channel switching results in a long switching time for the solenoid valve.

[0005] Public content

[0006] A main purpose of the present application is to overcome the defects of the above-mentioned prior art and provide a valve seat with a shorter switching stroke.

[0007] To achieve the above objectives, this application adopts the following technical solutions:

[0008] According to one aspect of the present application, a valve seat is provided, which includes a first channel and a second channel. One end of the first channel has a first hole for connecting to a first outlet pipeline; the other end has a second hole for communicating with the inner cavity of the valve; the diameter of the first hole is larger than the diameter of the second hole, and on a plane perpendicular to the axis of the first hole, the projection of the second hole is within the projection of the first hole. One end of the second channel has a third hole for connecting to a second outlet pipeline, and the other end has a fourth hole for communicating with the inner cavity of the valve; the diameter of the third hole is larger than the diameter of the fourth hole, and on a second plane perpendicular to the axis of the third hole, the projection of the fourth hole is within the projection of the third hole. The minimum distance between the hole wall of the second hole and the hole wall of the fourth hole is equal to the minimum distance between the hole wall of the first hole and the hole wall of the third hole.

[0009] According to one embodiment of the present application, the flow area of ​​one end of the second hole connected to the first hole is larger than the flow area of ​​the other end; the flow area of ​​one end of the fourth hole connected to the third hole is larger than the flow area of ​​the other end.

[0010] According to one embodiment of the present application, the hole wall of the second hole away from the fourth hole is inclined toward the fourth hole in the direction from one end connected to the first hole to the other end and / or the hole wall of the fourth hole away from the second hole is inclined toward the second hole in the direction from one end connected to the third hole to the other end.

[0011] According to one embodiment of the present application, the hole wall of the second hole away from the fourth hole includes a first straight segment, a first inclined segment and a second straight segment in a direction from one end connected to the first hole to the other end, wherein the first inclined segment connects the first straight segment and the second straight segment and / or; the hole wall of the fourth hole away from the second hole includes a third straight segment, a second inclined segment and a fourth straight segment in a direction from one end connected to the third hole to the other end, wherein the second inclined segment connects the third straight segment and the fourth straight segment.

[0012] According to one embodiment of the present application, the hole wall of the second hole away from the fourth hole is arranged in a stepped shape in the direction from one end connected to the first hole to the other end and / or; the hole wall of the fourth hole away from the second hole is arranged in a stepped shape in the direction from one end connected to the third hole to the other end.

[0013] According to one embodiment of the present application, the hole wall of the second hole close to the fourth hole and the hole wall of the fourth hole close to the second hole are arranged to be straight.

[0014] According to one aspect of the present application, a solenoid valve is provided, comprising the valve seat, a slider, and a core iron. The valve seat is disposed between at least one inlet pipe and at least two outlet pipes and has two channels connecting the inlet pipes and the outlet pipes. The inlet pipe communicates with the valve's inner cavity, and the two outlet pipes connect to a first outlet pipeline and a second outlet pipeline, respectively. The two channels are a first channel and a second channel, respectively. The slider is sealingly disposed on the surface of the valve seat facing away from the outlet pipes. The slider is configured to block the channels and can slide along the surface, thereby blocking one of the two channels and allowing the inlet pipe to communicate with the outlet pipes through the unblocked other of the two channels. The core iron drives the slider to move. The outlet pipes correspond one-to-one with the channels. The channels include a first subchannel connecting to the outlet pipes and a second subchannel connecting to the inlet pipes. The first subchannel communicates with the second subchannel, and the cross-sectional area of ​​the first subchannel is larger than the cross-sectional area of ​​the second subchannel. The first subchannel in the first channel is a first hole, the second subchannel in the first channel is a second hole, the first subchannel in the second channel is a third hole, and the second subchannel in the second channel is a fourth hole. The slider has a blocking surface that contacts the valve seat. When the slider blocks the second sub-channel and there is no leakage between the slider and the second sub-channel, the minimum distance required between the outer edge of the blocking surface and the inner wall of the second sub-channel is defined as the slider outer sealing width H. The distance between the upper and lower extremes of the core iron movement is defined as the core iron stroke G. The widths of the two second sub-channels along the slider's movement direction are both J, and G ≥ H + J. The distance between the centerlines of the two second sub-channels along the slider's movement direction is defined as F. The slider has a blocking surface that contacts the valve seat, and the dimension of the blocking surface along the slider's movement direction is T, and T ≤ F + H and T ≥ J + 2H.

[0015] According to one embodiment of the present application, a dimension of the blocking surface in a direction perpendicular to the movement direction of the slider is larger than a dimension of the blocking surface in the movement direction of the slider.

[0016] According to one embodiment of the present application, the core iron stroke G is equal to the sum of the slider outer seal width H and the width J of the two second sub-channels along the slider movement direction. And / or, the dimension T of the blocking surface along the slider movement direction is equal to the sum of the distance F between the centerlines of the two second sub-channels along the slider movement direction and the slider outer seal width H. And / or, the dimension T of the blocking surface along the slider movement direction is equal to the sum of the width J of the two second sub-channels along the slider movement direction and twice the slider outer seal width H.

[0017] According to one embodiment of the present application, the blocking surface of the slider is provided with a recess, and a portion of the blocking surface located on a peripheral side of the recess is in sealing contact with the surface of the valve seat.

[0018] According to one embodiment of the present application, a reed is provided on the surface of the slider facing away from the valve seat. The reed seals and presses the slider against the valve seat and moves synchronously with the slider.

[0019] According to one embodiment of the present application, the slider is connected to the core iron through a bracket, one end of the bracket has a receiving hole, the slider is received in the receiving hole, and the other end of the bracket is connected to the core iron through a connector.

[0020] According to one embodiment of the present application, the bracket is sheet-shaped with a thickness of D1, and a boss is provided on the surface of one end of the bracket where the slider is set facing the valve seat, and the protruding height of the boss is D2. The distance between the surface of the valve seat facing away from the outlet pipe and the central axis of the core iron is E, then: E≥0.5D1+D2.

[0021] According to one embodiment of the present application, at least one of the two outlet pipes has a bending angle, and the bending angle is greater than or equal to 3 degrees.

[0022] According to one embodiment of the present application, the bending angles of the two outlet pipes are both 90 degrees, and the center lines of the bent portions of the two outlet pipes are on a straight line.

[0023] According to one embodiment of the present application, the two channels include a first channel and a second channel spaced apart along the sliding direction of the slider, the first channel and the second channel are both multiple, and the arrangement direction of the first channel is parallel to the arrangement direction of the second channel.

[0024] According to one embodiment of the present application, the channel includes a kidney-shaped hole.

[0025] It can be seen from the above technical solutions that the advantages and positive effects of the valve seat proposed in this application are:

[0026] The valve seat proposed in the present application includes a first channel and a second channel formed by a large hole at one end and a small hole at the other end, and the large hole and the small hole are connected to form. The large hole is connected to the outlet pipeline, and the small hole is used to connect to the inner cavity of the valve. On the plane perpendicular to the axis of the large hole, the projection of the small hole is inside the projection of the large hole. The minimum distance between the hole walls of the two small holes is equal to the minimum distance between the hole walls of the two large holes. Such a design can make the two small holes be located at the position closest to each other, which is conducive to reducing the fluid channel switching stroke. The present application can also achieve the switching of the flow channel without having to detach from the valve port, thereby making the pulling force required to switch the flow channel smaller, greatly improving the flow channel switching ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The various objects, features, and advantages of the present application will become more apparent by considering the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present application and are not necessarily drawn to scale. In the drawings, the same reference numerals always indicate the same or similar parts.

[0028] FIG1 is a schematic diagram of a solenoid valve according to the present application in one state.

[0029] FIG2 is an enlarged view of point I in FIG1 .

[0030] FIG3 is a schematic diagram of another state of the solenoid valve of the present application.

[0031] FIG. 4 is an enlarged view of point II in FIG. 3 .

[0032] FIG5 is a schematic diagram of the three-dimensional structure of the valve seat of the solenoid valve of the present application.

[0033] FIG. 6 is a front view of FIG. 5 .

[0034] FIG7 is a cross-sectional view taken along the line AA in FIG6 .

[0035] FIG8 is a schematic diagram of the three-dimensional structure of the slider of the present application.

[0036] FIG. 9 is a front view of FIG. 8 .

[0037] FIG10 is a cross-sectional view taken along line BB in FIG9 .

[0038] FIG11 is a schematic diagram of the three-dimensional structure of the bracket of the present application.

[0039] FIG. 12 is a front view of FIG. 11 .

[0040] FIG13 is a left side view of FIG12.

[0041] FIG. 14 is a front view of another embodiment of the valve seat of the present application.

[0042] FIG15 is a schematic cross-sectional view taken along line CC of FIG14 .

[0043] FIG. 16 is a rear view of FIG. 14 .

[0044] FIG17 is a CC cross-sectional schematic diagram of a third embodiment of the valve seat of the present application (the main view can be seen in FIG14 ).

[0045] FIG18 is a CC cross-sectional schematic diagram of a fourth embodiment of the valve seat of the present application (the main view can be seen in FIG14 ).

[0046] Description of the accompanying drawings: 1 - solenoid valve; 10 - valve seat; 100 - first channel; 200 - second channel; 101 - first subchannel (first hole); 201 - first subchannel (third hole); 102 - second subchannel (second hole); 202 - second subchannel (fourth hole); 1021. first straight section; 1022. first inclined section; 1023. second straight section; 2021. third straight section; 2022. second inclined section; 2023. fourth straight section; 300 - limiting step; 400 - surface; 11 - inlet pipe; 12 - first outlet pipe; 13 - second outlet pipe; 14 - slider; 140 - sealing surface; 141 - bottom surface; 142 - recess; 15 - core iron; 16 - bracket; 160 - receiving hole; 161-connecting hole; 162, 163-boss; 17-reed; 18-core iron spring; 19-rivet; 20-magnetic ring; 21-attractor; 22-sleeve; 23-valve cover; H-slider outer sealing width; G-core iron stroke; J-width of the second sub-channel along the slider movement direction; F-distance between the center lines of the two second sub-channels along the slider movement direction; T-dimension of the slider's sealing surface along the slider movement direction; E-distance between the surface of the valve seat facing away from the outlet pipe and the central axis of the core iron; D1-bracket thickness; D2-boss height; L-dimension of the slider's sealing surface perpendicular to the movement direction. DETAILED DESCRIPTION

[0047] Typical embodiments that embody the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various variations in different embodiments without departing from the scope of the present application, and the description and drawings therein are essentially for illustrative purposes and are not intended to limit the present application.

[0048] In the following description of various exemplary embodiments of the present application, reference is made to the accompanying drawings, which form a part hereof and illustrate, by way of example, various exemplary structures, systems, and steps that may implement various aspects of the present application. It should be understood that other specific embodiments of components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the present application. When introducing elements / components / etc. described and / or illustrated herein, the terms "first," "second," and "third," etc. are used to indicate the presence of one or more elements / components / etc. The terms "comprising," "including," and "having" are used to indicate an open-ended inclusiveness and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc. Although the terms "above," "below," "between," etc. may be used in this specification to describe various exemplary features and elements of the present application, these terms are used herein for convenience only, such as in accordance with the orientation of the examples depicted in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of a structure to fall within the scope of the present application.

[0049] As shown in Figures 1 to 10, the solenoid valve 1 of the present application includes a valve seat 10, a slider 14 and a core iron 15. The valve seat 10 is arranged between at least one inlet pipe 11 and at least two outlet pipes (a first outlet pipe 12 and a second outlet pipe 13), and has two channels connecting the inlet pipe 11 and the outlet pipes 12 and 13; wherein the outlet pipes 12 and 13 correspond to the channels one by one. The slider 14 is sealed on the surface 400 of the valve seat 10 facing away from the outlet pipes 12 and 13. There is no fluid channel in the slider 14, which is used to block the channel. The slider 14 can slide along the surface 400, thereby blocking one of the two channels, so that the inlet pipe 11 is connected to the outlet pipe 12 or 13 through the other unblocked channel of the two channels. The core iron 15 drives the slider 14 to move.

[0050] The channel includes first sub-channels 101 and 201 connecting the outlet pipes 12 and 13, and second sub-channels 102 and 202 for connecting to the inlet pipe 11. The first sub-channels 101 and 201 are connected to the second sub-channels 102 and 202, and the cross-sectional area of ​​the first sub-channels 101 and 201 is larger than the cross-sectional area of ​​the second sub-channels 102 and 202. The first sub-channel on the first channel is the first hole 101, the second sub-channel on the first channel is the second hole 102, the first sub-channel on the second channel is the third hole 201, and the second sub-channel on the second channel is the fourth hole 202.

[0051] The slider 14 has a blocking surface 140 that contacts the valve seat 10. When the slider 14 blocks the second sub-channel 102 or 202 and there is no leakage between the slider 14 and the second sub-channel 102 or 202, the minimum distance required between the outer edge of the blocking surface 140 and the inner wall of the second sub-channel 102 or 202 is defined as the slider outer sealing width H (see Figure 4), and the distance between the upper and lower extreme positions of the core iron 15 is defined as the core iron stroke G. The widths of the two second sub-channels 102 and 202 along the movement direction of the slider 14 are both J, the distance between the center lines of the two second sub-channels 102 and 202 along the movement direction of the slider 14 is F, and the dimension of the blocking surface 140 along the movement direction of the slider is T, then G≥H+J, T≤F+H and T≥J+2H.

[0052] The solenoid valve 1 of the present application realizes the switching of the fluid channel by setting the slider 14 to move in a sealed manner along the surface 400 of the valve seat 10. No fluid channel is set in the slider 14, and the switching of the fluid channel is realized by the slider 14 blocking some channels and opening other channels. In order to improve the sealing effect between the module 14 and the valve seat 10, the slider 14 and the valve seat 10 are usually polished, thereby reducing the friction coefficient between the slider 14 and the valve seat 10. The friction coefficient between the two is less than 1, so the pulling force to pull the slider is much smaller than the direct pulling force required to detach from the valve port, so that a larger flow channel switching can be achieved with a smaller pulling force, thereby improving the performance of the solenoid valve.

[0053] The solenoid valve 1 of the present application utilizes a larger cross-sectional area of ​​the channel connecting the outlet pipes 12 and 13 than the channel connecting the inlet pipe 11. This allows fluid to flow from a smaller area to a larger area, improving fluid flow stability and avoiding turbulence. It also reduces pressure loss during fluid flow through the channel. The valve seat 10 can be molded to maximize the utilization of the valve seat's flow area and improve the flow rate of the solenoid valve.

[0054] The solenoid valve 1 of the present application can switch the fluid channel when the core iron 15 drives the slider 14 to slide up and down, and the fluid channel can be fully opened or completely blocked; while ensuring the sealing effect, the distance between the two channels is limited, thereby reducing the stroke of the slider and improving the switching efficiency.

[0055] The solenoid valve 1 of the present application uses a sleeve 22 as an outer shell. The valve seat 10, slider 14, and core iron 15 are all placed inside the sleeve 22. An attractor 21 is provided inside one end of the sleeve 22. The core iron 15 is connected to the slider 14 via a bracket 16. A core iron spring 18 is provided inside the core iron 15, and the core iron spring 18 is fixed to the attractor 21. A magnetic ring 20 is provided between the attractor 21 and the core iron 15, and the core iron 15 can move up and down relative to the attractor 21. The other end of the sleeve 22 is connected to the inlet pipe 11 through the valve cover 23.

[0056] In this embodiment, the two channels include a first channel 100 and a second channel 200 spaced apart along the sliding direction of the slider 14. There are multiple first channels 100 and second channels 200, and the arrangement direction of the first channel 100 is parallel to the arrangement direction of the second channel 200. Arranging the first channel 100 and the second channel 200 side by side in the upper and lower directions can increase the overall flow surface of the channel and improve the flow rate of the fluid passing through. The first channels 100 and the second channels 200 shown in Figure 5 are both two, and can also be three, four or five, etc., and multiple channels can be set under the premise of ensuring the strength of the valve seat 10. The number of the first channel 100 and the second channel 200 can be the same or different. The valve seat 10 can be formed by machining, and the first channel 100 and the second channel 200 are both two through holes, which can improve the flow capacity and reduce the difficulty of processing.

[0057] In this embodiment, as shown in Figures 8 to 10 , the slider 14 further comprises a bottom surface 141 perpendicular to the slider's direction of movement. The dimension L of the blocking surface 140 perpendicular to the slider's direction of movement is greater than the dimension T of the blocking surface 140 along the slider's direction of movement. The adoption of an overall flatter slider shape allows the slider 14 to move a shorter distance up and down to switch between upper and lower flow channels, thereby improving switching efficiency, reducing power consumption required for switching, and conserving energy. The slider 14 can be shaped as a flattened rectangle, a flattened ellipse as shown, or any other flattened cube, as long as it can achieve sealed sliding for flow channel switching.

[0058] In this embodiment, referring to Figures 1 to 10, the core iron stroke G is equal to the sum of the sealing width H on the outer side of the slider and the width J of the two second sub-channels 102 and 202 along the direction of movement of the slider; this can ensure that the core iron stroke is the shortest while meeting the performance of fluid channel switching.

[0059] And / or, the dimension T of the sealing surface 140 along the movement direction of the slider is equal to the sum of the distance F between the center lines of the two second sub-channels 102 and 202 along the movement direction of the slider 14 and the sealing width H on the outer side of the slider. At this time, the slider 14 satisfies the maximum slider thickness when it meets the conditions of being able to switch the fluid channel, and the fluid channel can be fully opened, and the blocked fluid channel is completely blocked.

[0060] Alternatively, the dimension T of the sealing surface 140 along the slider's direction of motion is equal to the sum of the width J of the two second sub-channels 102 and 202 along the slider's direction of motion and twice the slider's outer sealing width H. This is the minimum slider thickness required for the slider 14 to satisfy the conditions of being able to switch fluid channels, fully open the fluid channels, and completely block blocked fluid channels.

[0061] In this embodiment, referring to Figures 1 to 10 , the dimension T of the blocking surface 140 along the slider's motion direction is equal to the thickness of the slider 14 along the slider's motion direction. This dimension T of the blocking surface 140 along the slider's motion direction is equal to the thickness of the slider 14 along the slider's motion direction. This simplifies the processing of the slider 14 and facilitates the fabrication of structures that mate with and mount the slider 14. In other embodiments, the dimension T of the blocking surface 140 along the slider's motion direction may not be equal to the thickness of the slider 14 along the slider's motion direction. For example, if the dimension T is less than the thickness of the slider 14, the bottom edge of the blocking surface 140 of the slider 14 forms a notch-like shape relative to the bottom surface 141 of the slider 14; if the dimension T is greater than the thickness of the slider 14, the bottom edge of the blocking surface 140 of the slider 14 forms a protrusion-like shape relative to the bottom surface 141 of the slider 14. In this embodiment, the dimension T of the blocking surface 140 along the motion direction is equal to the thickness of the slider 14 along the slider's motion direction. This facilitates adjustment of other interlocking dimensions to optimize the fluid channel switching of the slider 14.

[0062] In this embodiment, as shown in Figures 8 to 10 , the blocking surface 140 of the slider 14 is provided with a recess 142. The portion of the blocking surface 140 surrounding the recess 142 is in sealing contact with the surface 400 of the valve seat 10. Providing the recess 142 on the blocking surface 140 of the slider 14 reduces the contact area between the slider 14 and the valve seat 10, increases the preload pressure during sealing of the slider 14, and improves the slider 14's anti-deformation strength. In addition to the blocking surface 140, the surface of the slider 14 opposite the blocking surface 140 may also be provided with a recess 142.

[0063] In this embodiment, referring to Figures 5 to 7 , the valve seat 10 has a limiting step 300 that is used to limit the movement of the core iron 15. The limiting step 300 provided on the valve seat 10 achieves the lower limit of the core iron 15, improving positioning accuracy and ensuring the positional accuracy of the slider 14 when the solenoid valve switches fluid channels, thereby ensuring flow consistency.

[0064] In this embodiment, a reed 17 is provided on the surface 400 of the slider 14 facing away from the valve seat 10. The reed 17 seals and presses the slider 14 against the valve seat 10 and moves synchronously with the slider 14. The reed 17 provides elastic pressure to press the slider 14 toward the valve seat 10, ensuring that the slider 14 maintains sealing contact with the surface 400 of the valve seat 10 as it slides.

[0065] In this embodiment, as shown in Figures 11 to 13, the slider 14 is connected to the core iron 15 via a bracket 16. One end of the bracket 16 has a receiving hole 160, in which the slider 14 is received. The other end of the bracket 16 is connected to the core iron 15 via a connector. The connection between the slider 14 and the core iron 15 is achieved through the bracket 16, which allows for precise sliding of the slider 14 and a simple structure. The connector can be a rivet 19, a bolt, a screw, etc., and is disposed in the connection hole 161 of the bracket 16.

[0066] In this embodiment, the bracket 16 is sheet-shaped and has a thickness of D1. The end of the bracket 16 on which the slider 14 is mounted, and which faces the valve seat 10, is provided with bosses 162 and 163 on its surface 400. The protrusion height of bosses 162 and 163 is D2. The distance between the surface 400 of the valve seat 10 facing away from the outlet nozzles 12 and 13 and the central axis of the core iron 15 is E, where E ≥ 0.5 D1 + D2. This ensures that no interference occurs during the overall assembly of the solenoid valve 1.

[0067] In this embodiment, as shown in Figures 1 and 3, at least one of the two outlet pipes 12 and 13 has a bend angle. The bend angle is greater than or equal to 3 degrees, and can be 90 degrees. The center lines of the bent portions of the two outlet pipes 12 and 13 are aligned. The bending of the pipe improves space utilization, and the alignment of the bent portions of the pipes, that is, the ends of the outlet pipes 12 and 13 away from the valve seat 10 are separated from each other, which prevents the external pipes connected to the outlet pipes from interfering with each other. If the end of the pipe away from the valve seat needs to be welded to an external object, the bending of the pipe can also prevent the two pipes from being too close to each other and affecting their respective welds.

[0068] In this embodiment, both the first channel 100 and the second channel 200 are circular holes. In other embodiments, they can also be kidney-shaped holes. Alternatively, the first channel 100 can be a circular hole and the second channel 200 a kidney-shaped hole; or a combination of the first channel 100 and the second channel 200 can be used. A kidney-shaped hole can increase the cross-sectional area of ​​the fluid channel and improve flow rate.

[0069] In this embodiment, the portion of the surface 400 of the valve seat 10 facing away from the outlet nozzles 12 and 13 that corresponds to the movement of the slider 14 is flat. The flat surface of the surface 400 of the valve seat 10 that mates with the slider 14 improves the sealing effect of the slider 14 and allows for smooth sliding of the slider 14, reducing the force exerted by the core iron 15 on the slider 14.

[0070] In this exemplary embodiment, the solenoid valve proposed in this application is described using a direct-acting three-way solenoid valve as an example. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this application to other types of solenoid valves. These modifications remain within the scope of the principles of the solenoid valve proposed in this application.

[0071] It should be noted that the solenoid valves shown in the drawings and described in this specification are only a few examples of the many types of solenoid valves that can employ the principles of the present application. It should be clearly understood that the principles of the present application are in no way limited to any details or any components of the solenoid valves shown in the drawings or described in this specification.

[0072] The above is a detailed description of several exemplary embodiments of the solenoid valve proposed in this application. The working process of the solenoid valve proposed in this application will be exemplarily described below.

[0073] In conjunction with Figures 1 to 13 , the solenoid valve 1 proposed in this application is installed between an inlet pipe 11 and at least two outlet pipes 12 and 13. The valve seat 10 is disposed at the ends of the outlet pipes 12 and 13 and has at least two channels connecting the inlet pipe 11 and the outlet pipes 12 and 13. A slider 14 is sealingly disposed on a surface 400 of the valve seat 10 facing away from the outlet pipes 12 and 13. The slider 14 has no fluid passages within it and is used to block the passages. The slider 14 can slide along the surface 400. The core iron 15 drives the slider 14 to move. The core iron 15 is connected to the slider 14 via a bracket 16. A core iron spring 18 is disposed within the core iron 15 and is fixed to an attractor 21. A magnetic ring 20 is disposed between the attractor 21 and the core iron 15, allowing the core iron 15 to move up and down relative to the attractor 21.

[0074] Referring to Figures 1 and 2, the state shown in Figures 1 and 2 is a working state of the solenoid valve 1 of the present application, wherein the core iron 15 is at the uppermost end, and driven by the core iron 15, the slider 14 is also at the uppermost end. At this time, the upper fluid channels are all blocked by the slider 14, and the lower fluid channels are all open. The fluid can flow in from the inlet pipe 11 and then flow to the second outlet pipe 13 through the open fluid channel at the bottom of the valve seat 10.

[0075] When the fluid channel needs to be switched, the attractor 21 releases the suction force, and the core iron 15 slides downward under the action of gravity, thereby driving the slider 14 to slide downward along the surface 400 of the valve seat 10. This process is the process of opening the upper fluid channel and closing the lower fluid channel. When the core iron 15 moves downward to contact the limiting step 300 of the valve seat 10, referring to Figures 3 and 4, another state of the valve of the present application is that the slider 14 is at the bottom end, the upper fluid channel is fully open, and the lower fluid channel is completely blocked by the slider 14. The fluid can flow into the inlet pipe 11 and then flow to the first outlet pipe 12 through the open fluid channel on the upper part of the valve seat 10.

[0076] When the fluid channel needs to be switched again, the attractor 21 attracts the core iron 15 to move upward, and the slider 14 also slides upward. This process is the process of opening the lower fluid channel and closing the upper fluid channel. When the core iron 15 returns to the uppermost end, the state at this time is the state of Figures 1 and 2.

[0077] Through the working process of the solenoid valve of the present application described above, it can be concluded that the solenoid valve 1 of the present application, through the core iron 15, drives the slider 14 to move to block part of the channel of the valve seat 10, thereby realizing the switching of the flow channel. The pulling force of the core iron 15 pulling the slider 14 is much smaller than the direct pulling force required by the method of detaching from the valve port, so that a larger flow channel switching can be achieved with a smaller pulling force. In addition, the core iron stroke is small, which can reduce the magnetic force required to drive the core iron, thereby facilitating the reduction of the solenoid valve core coil and realizing a miniaturized design.

[0078] In summary, the solenoid valve 1 proposed in the present application includes a valve seat 10, a slider 14 and a core iron 15. The valve seat 10 is arranged between at least one inlet pipe 11 and at least two outlet pipes 12, 13, and has at least two channels connecting the inlet pipe 11 and the outlet pipes 12, 13. The outlet pipes 12, 13 are arranged in a one-to-one correspondence with the channels. The slider 14 is sealed and arranged on the surface 400 of the valve seat 10 facing away from the outlet pipes 12, 13. There is no fluid channel in the slider 14, which is used to block the channel. The slider 14 can slide along the surface 400, thereby blocking at least one of the two channels, so that the inlet pipe 11 is connected to the outlet pipe 12 or 13 through the other unblocked part of the at least two channels. The movement of the slider 14 blocks part of the channel of the valve seat 10, thereby realizing the switching of the flow channel. Since the friction coefficient is less than 1, the pulling force of pulling the slider 14 is much smaller than the direct pulling force required by the method of detaching from the valve port, so that a larger flow channel switching can be achieved with a smaller pulling force, thereby improving the performance of the solenoid valve. The slider 14 is driven by the core iron 15. The core iron has a small stroke, which can reduce the magnetic force required to drive the core iron, thereby facilitating the reduction of the solenoid valve core coil and the overall size of the solenoid valve.

[0079] The solenoid valve 1 of the present application includes a first sub-channel 101, 201 connecting the outlet pipes 12, 13 and a second sub-channel 102, 202 for connecting to the inlet pipe 11. The first sub-channel 101, 201 is connected to the second sub-channel 102, 202, and the cross-sectional area of ​​the first sub-channel 101, 201 is larger than the cross-sectional area of ​​the second sub-channel 102, 202. By making the cross-sectional area of ​​the channel connecting one end of the outlet pipes 12, 13 larger than the cross-sectional area of ​​the channel connecting one end of the inlet pipe 11, the fluid flows from a small area to a large area, which can improve the stability of the fluid flow process and avoid turbulence; it can also reduce the pressure loss of the fluid during the flow through the channel. The valve seat 10 can be formed by a mold forming method, which can maximize the utilization rate of the flow area of ​​the valve seat 10 and increase the flow rate of the solenoid valve.

[0080] In the solenoid valve 1 of the present application, the slider 14 has a blocking surface 140 that contacts the valve seat 10. When the slider 14 blocks the second sub-channel 102 or 202 and there is no leakage between the slider 14 and the second sub-channel 102 or 202, the minimum distance value required between the outer edge of the blocking surface 140 and the inner wall of the second sub-channel 102 or 202 is defined as the slider outer sealing width H (see Figure 4), and the distance between the upper and lower extreme positions of the core iron 15 is defined as the core iron stroke G. The widths of the two second sub-channels 102 and 202 along the movement direction of the slider 14 are both J, the distance between the center lines of the two second sub-channels 102 and 202 along the movement direction of the slider 14 is F, and the dimension of the blocking surface 140 along the movement direction of the slider is T, then G≥H+J, T≤F+H and T≥J+2H. In this way, the core iron 15 can switch the fluid channel when driving the slider 14 to slide up and down, and the fluid channel can be fully opened or completely blocked; while ensuring the sealing effect, the distance between the two channels is limited, thereby reducing the stroke of the slider and improving the switching efficiency.

[0081] The solenoid valve described above is a control device used in refrigeration equipment. Related art solenoid valves primarily utilize a valve port-disconnecting mechanism to switch flow channels. This results in a long travel distance for the channel-blocking structure to disengage from the valve port, and a significant amount of force is required to directly pull the channel-blocking structure away from the valve port.

[0082] Another main purpose of the present application is to overcome at least one of the defects of the above-mentioned prior art and provide a solenoid valve with a smaller flow channel switching stroke and a smaller pulling force required for switching.

[0083] The advantages and positive effects of the solenoid valve proposed in this application are:

[0084] The solenoid valve proposed in this application includes a valve seat, a slider, and a core iron. The valve seat is positioned between at least one inlet pipe and two outlet pipes and has two channels connecting the inlet and outlet pipes. The outlet pipes are arranged in a one-to-one correspondence with the channels. The two channels connected to the outlet pipes allow fluid to enter the valve cavity through different channels after entering, thus meeting practical production needs.

[0085] The slider seal is set on the surface of the valve seat facing away from the outlet pipe. The slider is used to block the channel. The slider can slide along the surface, thereby blocking one of the two channels, allowing the inlet pipe to connect to the outlet pipe through the other unblocked channel. The slider is driven by the core iron. The movement of the slider blocks part of the channel of the valve seat to achieve flow channel switching. In order to improve the sealing effect between the module and the valve seat, the slider and the valve seat are usually polished, thereby reducing the friction coefficient between the slider and the valve seat. The friction coefficient between the two is less than 1. Therefore, the pulling force to pull the slider is much smaller than the direct pulling force required to detach the valve port. Therefore, a larger flow channel switching can be achieved with a smaller pulling force, thereby improving the performance of the solenoid valve.

[0086] The channel includes a first sub-channel connected to the outlet pipe and a second sub-channel for connecting to the inlet pipe. The first sub-channel is connected to the second sub-channel, and the cross-sectional area of ​​the first sub-channel is larger than the cross-sectional area of ​​the second sub-channel. When the slider blocks the second sub-channel and there is no leakage between the slider and the second sub-channel, the minimum distance required between the outer edge of the blocking surface and the inner wall of the second sub-channel is defined as the slider outer sealing width H, and the distance between the extreme positions of the core iron moving up and down is defined as the core iron stroke G. The widths of the two second sub-channels along the direction of movement of the slider are both J, and the distance between the center lines of the two second sub-channels along the direction of movement of the slider is F. The dimension of the blocking surface along the direction of movement of the slider is T, then G≥H+J, T≤F+H and T≥J+2H. In this way, the fluid channel can be switched when the core iron drives the slider to slide up and down, and the fluid channel can be fully opened or completely blocked; while ensuring the sealing effect, the distance between the two channels is limited, thereby reducing the stroke of the slider and improving the switching efficiency. The valve seat 10 involved in the present disclosure is described in detail below.

[0087] As shown in Figures 5 to 7, the valve seat 10 of the present application includes a first channel 100 and a second channel 200. One end of the first channel 100 has a first hole 101 for connecting to the first outlet pipeline; the other end has a second hole 102 for connecting to the inner cavity of the valve; the diameter of the first hole 101 is larger than the diameter of the second hole 102. One end of the second channel 200 has a third hole 201 for connecting to the second outlet pipeline, and the other end has a fourth hole 202 for connecting to the inner cavity of the valve; the diameter of the third hole 201 is larger than the diameter of the fourth hole 202, that is, the first hole 101 and the third hole 201 are larger holes, and the second hole 102 and the fourth hole 202 are smaller holes. Designing the fluid channel to be small at the inlet and large at the outlet can maximize the use of the area of ​​the fluid channel, reduce the flow resistance of the fluid channel, and increase the flow rate of the three-way valve.

[0088] On a plane perpendicular to the axis of the first hole 101, the projection of the second hole 102 is within the projection of the first hole 101. On a second plane perpendicular to the axis of the third hole 201, the projection of the fourth hole 202 is within the projection of the third hole 201. Ensuring that the projection of the small hole is within the projection of the large hole can prevent fluid from impacting during passage, avoiding turbulence and eddies caused by external impacts within the fluid, ensuring smooth and stable flow, and improving fluid flow efficiency.

[0089] The minimum distance between the wall of the second hole 102 and the wall of the fourth hole 202 is equal to the minimum distance between the wall of the first hole 101 and the wall of the third hole 201. This allows the two small holes to be located closest to each other, which helps to reduce the fluid channel switching stroke.

[0090] The present application can also achieve the switching of the flow channel without having to disengage the valve port, thereby reducing the pulling force required to switch the flow channel and enhancing the flow channel switching capability.

[0091] As shown in Figures 14 to 16, in other embodiments, the flow area of ​​the second hole 102 of the present invention at one end connected to the first hole 101 is larger than the flow area at the other end of the second hole 102; and the flow area of ​​the fourth hole 202 at one end connected to the third hole 201 is larger than the flow area at the other end of the fourth hole 202. Designing the second hole 102 and the fourth hole 202 with a smaller opening at one end and a larger opening at the other end, and with the opening gradually increasing in size along the direction of fluid flow, helps reduce pressure loss during fluid flow.

[0092] In this embodiment, the wall of the second hole 102 away from the fourth hole 202 is tilted toward the fourth hole 202 in the direction from one end connected to the first hole 101 to the other end. In this embodiment, the wall of the fourth hole 202 away from the second hole 102 is tilted toward the second hole 102 in the direction from one end connected to the third hole 201 to the other end. This gradually tilted wall arrangement can reduce pressure loss during fluid flow and facilitates processing.

[0093] The second hole 102 and the fourth hole 202 may be arranged so that one is inclined and the other is not inclined, or both are arranged so that both are inclined.

[0094] As shown in Figure 17, the wall of the second hole 102 away from the fourth hole 202 includes, in the direction from one end connecting to the first hole 101 to the other end, a first straight segment 1021, a first inclined segment 1022, and a second straight segment 1023, wherein the first inclined segment 1022 connects the first straight segment 1021 and the second straight segment 1023. In this embodiment, the wall of the fourth hole 202 away from the second hole 102 includes, in the direction from one end connecting to the third hole 201 to the other end, a third straight segment 2021, a second inclined segment 2022, and a fourth straight segment 2023, wherein the second inclined segment 2022 connects the third straight segment 2021 and the fourth straight segment 2023. The segmented hole wall design can also reduce pressure loss during fluid flow, alleviate disturbances during fluid flow, and improve the efficiency of fluid passage.

[0095] The second hole 102 and the fourth hole 202 may be arranged in three sections, one or not, or both may be arranged in three sections.

[0096] As shown in Figure 18, the wall of the second hole 102 away from the fourth hole 202 is arranged in a stepped shape from one end connected to the first hole 101 to the other end. In this embodiment, the wall of the fourth hole 202 away from the second hole 102 is arranged in a stepped shape from one end connected to the third hole 201 to the other end. This stepped arrangement can also reduce fluid pressure loss.

[0097] The second hole 102 and the fourth hole 202 may be arranged in a stepped shape, or both may be arranged in a stepped shape.

[0098] In the above embodiments, referring to Figures 5 to 18 , the wall of the second hole 102 near the fourth hole 202 and the wall of the fourth hole 202 near the second hole 102 are arranged to be straight. This design simplifies the manufacturing process, reduces costs, and improves production efficiency. It also allows the two small holes to be located closest to each other, which helps to reduce the fluid channel switching stroke.

[0099] In the above embodiments, referring to Figures 5 to 7 , there are multiple second holes 102 and multiple fourth holes 202, and the arrangement direction of the second holes 102 is parallel to the arrangement direction of the fourth holes 202. In the embodiments of Figures 5 to 7 , there are two second holes 102 and two fourth holes 202, but in other embodiments, there may be three, five, or other holes. The provision of multiple holes can increase the flow rate of fluid passing through, improve the circulation efficiency of the three-way valve, increase fluid flow, and increase driving force.

[0100] As shown in Figures 14 to 18 , the second hole 102 and the fourth hole 202 are configured as kidney-shaped holes. The kidney-shaped holes can expand the fluid channel and are easy to process without affecting the overall strength of the valve seat 10.

[0101] As shown in Figures 5 to 18, the valve seat 10 has a surface 400 that connects to the inner cavity of the valve. The portion of the surface 400 containing the second hole 102 and the fourth hole 202 is flat. The flat design allows the slider to slide sealed on the surface 400, facilitating the switching of the fluid channel. The valve seat 10 has a limiting step 300, which is used to limit the movement of the valve core iron. The limiting step 300 is simple and effective in limiting the movement of the core iron, which can extend the service life of the core iron and thus extend the service life of the entire valve.

[0102] As shown in Figure 1, the solenoid valve 1 of the present application includes a first outlet pipe 12, a second outlet pipe 13, an inlet pipe 11, a slider 14, and the valve seat 10 above, wherein the first hole 101 and the third hole 201 of the valve seat 10 are connected to the first outlet pipe 12 and the second outlet pipe 13 respectively, and the first outlet pipe 12 and the second outlet pipe 13 have a bend. The valve seat 10 is connected to the first outlet pipeline through the first outlet pipe 12 and to the second outlet pipeline through the second outlet pipe 13. The valve of the present application uses a slider 14 to switch between the first channel 100 and the second channel 200 of the valve seat 10, so that the switching of the flow channel does not need to be carried out by disengaging from the valve port, which is beneficial to improving the overall working capacity of the valve.

[0103] As shown in Figure 1, the solenoid valve 1 of the present application also includes a sleeve 22, a valve cover 23 is provided at one end of the sleeve 22, and the inlet pipe 11 is connected to the inner cavity of the solenoid valve 1 through the valve cover 23. The other end of the sleeve 22 is provided with an attractor 21, a magnetic ring 20, a core iron spring 18, a core iron 15, a rivet 19 and a bracket 16 in sequence. The core iron spring 18 is fixed to the attractor 21 and is provided inside one end of the core iron 15. The other end of the core iron 15 is provided with a rivet 19 and a bracket 16. A slider 14 is provided on the bracket 16, one side of the slider 14 is in sealing contact with the valve seat 10, and a reed 17 is provided on the other side. The attractor 21 can drive the core iron 15 to move up and down to realize the up and down movement of the slider 14 relative to the valve seat 10, thereby realizing the switching of the channel of the valve seat 10.

[0104] In this exemplary embodiment, the valve seat proposed in this application is described using a three-way valve as an example. Those skilled in the art will readily appreciate that, in order to apply the relevant designs of this application to other types of valves, various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below; such modifications remain within the scope of the principles of the valve seat proposed in this application.

[0105] It should be noted that the valve seats shown in the drawings and described in this specification are only a few examples of the many types of valve seats that can employ the principles of the present application. It should be clearly understood that the principles of the present application are in no way limited to any details or any components of the valve seats shown in the drawings or described in this specification.

[0106] The above is a detailed description of several exemplary embodiments of the valve seat 10 proposed in this application. The following is an exemplary description of the use process of the valve seat 10 proposed in this application.

[0107] In conjunction with Figures 5 to 18, the valve seat 10 proposed in the present application is installed at the valve port of a direct-acting three-way solenoid valve, wherein the first hole 101 and the third hole 201 of the valve seat 10 are connected to the outlet pipe, and the second hole 102 and the fourth hole 202 can be connected to the inlet pipe by sliding a slider provided on the surface 400 of the valve seat 10. The slider is located in the valve cavity, and the inlet pipe is provided at an inlet of the valve cavity. The fluid pressure of the inlet pipe is always greater than the fluid pressure of the two outlet pipes. The slider seal is provided on the surface 400 of the valve seat 10 and can slide along the surface 400. During use, the core iron drives the slider to slide along the surface 400 of the valve seat 10 to realize the switching of the first channel 100 and the second channel 200 to be connected to the inlet pipe. The specific use process is as follows:

[0108] In the initial state, the slider blocks the second channel 200, and the second hole 102 of the upper first channel 100 is open, connecting the inlet pipeline and the first outlet pipeline, allowing fluid to flow out through the first channel 100 of the valve seat 10. When the channel needs to be switched, the core iron drives the slider to slide upward along the surface 400 of the valve seat 10, causing the slider to block the second hole 102 of the first channel 100, open the fourth hole 202 of the second channel 200, connect the inlet pipeline and the second outlet pipeline, and allow fluid to flow out through the second channel 200 of the valve seat 10. When switching is required again, the core iron drives the slider to slide downward, blocking the fourth hole 102 of the second channel 200, opening the second hole 102 of the upper first channel 100, connecting the inlet pipeline and the first outlet pipeline, and allowing fluid to flow out through the first channel 100 of the valve seat 10.

[0109] Through the above-mentioned use process of the valve seat of the present application, it can be concluded that the valve seat 10 of the present application designs the fluid channel into a first channel 100 and a second channel 200 that are small at the inlet and large at the outlet, which can maximize the use of the area of ​​the fluid channel and improve the flow of the three-way valve. The large hole is connected to the outlet pipe, and the small hole is used to connect the inlet pipe. On the plane perpendicular to the axis of the large hole, the projection of the small hole is within the projection of the large hole. The minimum distance between the hole walls of the two small holes is equal to the minimum distance between the hole walls of the two large holes. Such a design can make the two small holes located at the closest position to each other, reduce the fluid channel switching stroke, reduce the pulling force required to switch the flow channel, and greatly improve the flow channel switching ability of the direct-acting three-way solenoid valve.

[0110] In summary, the valve seat 10 proposed in this application includes a first channel 100 and a second channel 200. The first channel 100 has a first hole 101 at one end for connecting to a first outlet pipeline; and a second hole 102 at the other end for connecting to the valve inlet pipeline. The diameter of the first hole 101 is larger than the diameter of the second hole 102, and on a plane perpendicular to the axis of the first hole 101, the projection of the second hole 102 is within the projection of the first hole 101. The second channel 200 has a third hole 201 at one end for connecting to the second outlet pipeline, and a fourth hole 202 at the other end for connecting to the valve inlet pipeline. The diameter of the third hole 201 is larger than the diameter of the fourth hole 202, and on a second plane perpendicular to the axis of the third hole 201, the projection of the fourth hole 202 is within the projection of the third hole 201. The minimum distance between the wall of the second hole 102 and the wall of the fourth hole 202 is equal to the minimum distance between the wall of the first hole 101 and the wall of the third hole 201. The two small holes can be located closest to each other, which is beneficial for reducing the fluid channel switching stroke. The present application also enables the flow channel to be switched without having to detach from the valve port. Instead, the flow channel can be switched by sliding the slider on the surface of the valve seat, which can reduce the pulling force required to switch the flow channel.

[0111] The above detailed description and / or illustrations illustrate exemplary embodiments of the valve seat proposed in the present application. However, the embodiments of the present application are not limited to the specific embodiments described herein. Rather, the components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or each step of one embodiment may also be used in combination with other components and / or steps of other embodiments. When introducing elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "above" are used to indicate the presence of one or more elements / components / etc.

[0112] The embodiments of the present application are not limited to the specific embodiments described herein. On the contrary, the components of each embodiment can be used independently and separately from the other components described herein. Each component of an embodiment can also be used in combination with other components of other embodiments. In the description of this specification, the description of the terms "one embodiment", "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0113] In the embodiments, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the embodiments based on the specific circumstances.

[0114] While the valve seat presented in the present application has been described in terms of various specific embodiments, those skilled in the art will recognize that the application can be practiced with modification within the spirit and scope of the claims.

Claims

1. A valve seat, characterized in that: include: a first channel, wherein one end of the first channel has a first hole for connecting to a first outlet pipeline; The other end has a second hole for communicating with the inner cavity of the valve; the diameter of the first hole is larger than the diameter of the second hole, and on a plane perpendicular to the axis of the first hole, the projection of the second hole is inside the projection of the first hole; a second channel, wherein one end of the second channel has a third hole for connecting to a second outlet pipe, and the other end has a fourth hole for communicating with the inner cavity of the valve; the diameter of the third hole is larger than the diameter of the fourth hole, and on a plane perpendicular to the axis of the third hole, the projection of the fourth hole is within the projection of the third hole; The minimum distance between the hole wall of the second hole and the hole wall of the fourth hole is equal to the minimum distance between the hole wall of the first hole and the hole wall of the third hole.

2. The valve seat according to claim 1, wherein: The flow area of ​​one end of the second hole connected to the first hole is larger than the flow area of ​​the other end; the flow area of ​​one end of the fourth hole connected to the third hole is larger than the flow area of ​​the other end.

3. The valve seat according to claim 2, wherein: The hole wall of the second hole away from the fourth hole is inclined toward the fourth hole in the direction from one end connected to the first hole to the other end, and / or; The hole wall of the fourth hole away from the second hole is inclined toward the second hole in a direction from one end to the other end connected to the third hole.

4. The valve seat according to claim 2, wherein: The hole wall of the second hole away from the fourth hole comprises, in sequence from one end connected to the first hole to the other end, a first straight segment, a first inclined segment, and a second straight segment, wherein the first inclined segment connects the first straight segment and the second straight segment, and / or; The hole wall of the fourth hole away from the second hole includes a third straight segment, a second inclined segment and a fourth straight segment in sequence from one end connected to the third hole to the other end, wherein the second inclined segment connects the third straight segment and the fourth straight segment.

5. The valve seat according to claim 2, wherein: The hole wall of the second hole away from the fourth hole is arranged in a step-like manner in a direction from one end connected to the first hole to the other end, and / or; The hole wall of the fourth hole away from the second hole is arranged in a step-like shape in a direction from one end connected to the third hole to the other end.

6. The valve seat according to any one of claims 1 to 5, characterized in that: The hole wall of the second hole close to the fourth hole and the hole wall of the fourth hole close to the second hole are arranged to be straight.

7. A solenoid valve, characterized in that: include: The valve seat according to any one of claims 1 to 6, wherein the valve seat is disposed between at least one inlet pipe and two outlet pipes and has two channels communicating with the inlet pipe and the outlet pipes, wherein the inlet pipe communicates with an inner cavity of the valve, the two outlet pipes are respectively connected to a first outlet pipeline and a second outlet pipeline, and the two channels are respectively a first channel and a second channel; A slider; the slider is sealingly provided on the surface of the valve seat facing away from the outlet pipe, and the slider is used to block the channel. The slider can slide along the surface, thereby blocking one of the two channels, so that the inlet pipe is connected to the outlet pipe through the other unblocked channel of the two channels; A core iron, wherein the core iron drives the slider to move; wherein the outlet pipes correspond one to one with the channels; The channel includes a first sub-channel connected to the outlet pipe and a second sub-channel for communicating with the inlet pipe, the first sub-channel is communicated with the second sub-channel, the cross-sectional area of ​​the first sub-channel is larger than the cross-sectional area of ​​the second sub-channel, wherein the first sub-channel on the first channel is a first hole, the second sub-channel on the first channel is a second hole, the first sub-channel on the second channel is a third hole, and the second sub-channel on the second channel is a fourth hole; The slider has a blocking surface that contacts the valve seat. When the slider blocks the second sub-channel and there is no leakage between the slider and the second sub-channel, the minimum distance required between the outer edge of the blocking surface and the inner wall of the second sub-channel is defined as the slider outer sealing width H. The distance between the upper and lower limit positions of the core iron is defined as the core iron stroke G. The widths of the two second sub-channels along the slider movement direction are both J, so G ≥ H + J. The distance between the center lines of the two second sub-channels along the moving direction of the slider is defined as F, and the dimension of the blocking surface along the moving direction of the slider is defined as T, then T≤F+H and T≥J+2H.

8. The solenoid valve according to claim 7, wherein: A dimension of the blocking surface in a direction perpendicular to the movement direction of the slider is greater than a dimension of the blocking surface in the movement direction of the slider.

9. The solenoid valve according to claim 7, wherein: The core iron stroke G is equal to the sum of the outer sealing width H of the slider and the width J of the two second sub-channels along the slider movement direction; and / or The dimension T of the sealing surface along the direction of movement of the slider is equal to the sum of the distance F between the center lines of the two second sub-channels along the direction of movement of the slider and the sealing width H on the outer side of the slider; and / or The dimension T of the sealing surface along the movement direction of the slider is equal to the sum of the width J of the two second sub-channels along the movement direction of the slider and twice the sealing width H of the outer side of the slider.

10. The solenoid valve according to claim 8, wherein: The blocking surface of the slider is provided with a recess, and a portion of the blocking surface located on a peripheral side of the recess is in sealing contact with a surface of the valve seat.

11. The solenoid valve according to claim 7, wherein: A reed is provided on the surface of the slider facing away from the valve seat. The reed seals and presses the slider against the valve seat and moves synchronously with the slider.

12. The solenoid valve according to claim 7, wherein: The slider is connected to the core iron through a bracket. One end of the bracket has a receiving hole, and the slider is received in the receiving hole. The other end of the bracket is connected to the core iron through a connecting piece.

13. The solenoid valve according to claim 12, wherein: The bracket is sheet-shaped and has a thickness of D1. A boss is provided on the surface of one end of the bracket where the slider is set, facing the valve seat. The protruding height of the boss is D2. The distance between the surface of the valve seat facing away from the outlet pipe and the central axis of the core iron is E, then: E≥0.5D1+D2.

14. The solenoid valve according to claim 7, wherein: At least one of the two outlet pipes has a bending angle, and the bending angle is greater than or equal to 3 degrees.

15. The solenoid valve according to claim 14, wherein: The bending angles of the two outlet pipes are both 90 degrees, and the center lines of the bent parts of the two outlet pipes are on a straight line.

16. The solenoid valve according to any one of claims 7 to 15, characterized in that: The channel includes a first channel and a second channel spaced apart along the sliding direction of the slider. There are multiple first channels and multiple second channels. The arrangement direction of the first channels is parallel to the arrangement direction of the second channels.

17. The solenoid valve according to claim 7, wherein: The channel includes a kidney-shaped hole.

Images