Solenoid valve

Abstract

The invention provides an electromagnetic valve. The electromagnetic valve comprises a valve seat, a sliding block and core iron. Wherein the valve seat is provided with two channels and is arranged between the inlet connecting pipe and the outlet connecting pipe. The sliding block is arranged on the valve seat in a sealed mode, and the core iron drives the sliding block to slide to switch blocked channels. The channel includes a first sub-channel and a second sub-channel. When the sliding block is used for blocking the second sub-channels and no leakage exists between the sliding block and the second sub-channels, the minimum distance value needed by the outer edge of the sliding block blocking face and the inner side walls of the second sub-channels is the sliding block outer side sealing width H, the distance between the limiting position of vertical movement of the core iron is the core iron stroke G, the width of the two second sub-channels in the sliding block movement direction is J, and G is larger than or equal to H + J; the distance between the center lines of the two second sub-channels in the moving direction of the sliding block is F, the size of the blocking face in the moving direction of the sliding block is T, and T is smaller than or equal to F + H and larger than or equal to J + 2H. Switching of the fluid channels is achieved through sliding of the sliding block along the surface of the valve seat, large switching pulling force is not needed, and the stroke of the core iron needed for switching of the fluid channels is short.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular, to a solenoid valve. Background Art

[0002] Solenoid valves are control devices used in refrigeration equipment. Related art solenoid valves primarily use a disengagement mechanism to switch flow channels. This results in a long travel distance for the blocking structure to disengage from the valve port, and a significant amount of force is required to directly pull the blocking structure away from the valve port. Summary of the Invention

[0003] The main purpose of the present application is to overcome at least one of the defects of the above-mentioned prior art and to provide a solenoid valve with a smaller flow channel switching stroke and a smaller pulling force required for switching.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] According to one aspect of the present application, a solenoid valve is provided, which includes a valve seat, a slider and a core iron. The valve seat is arranged between at least one inlet pipe and at least two outlet pipes, and has two channels connecting the inlet pipe and the outlet pipe. The slider is sealed 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. The core iron drives the slider to move. The outlet pipe corresponds to the channel one by one. 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. 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.

[0006] 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] According to one embodiment of the present application, the bending angle is 90 degrees.

[0014] 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.

[0015] 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.

[0016] According to one embodiment of the present application, the channel includes a kidney-shaped hole.

[0017] It can be seen from the above technical solution that the advantages and positive effects of the solenoid valve proposed in this application are:

[0018] 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.

[0019] 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.

[0020] The channel includes a first subchannel connected to the outlet pipe and a second subchannel for connecting to the inlet pipe. The first subchannel is connected to the second subchannel, and the cross-sectional area of ​​the first subchannel is larger than that of the second subchannel. When the slider blocks the second subchannel and there is no leakage between the slider and the second subchannel, the minimum distance required between the outer edge of the sealing surface and the inner wall of the second subchannel is defined as the slider's outer sealing width H, and the distance between the extreme positions of the core iron's up and down movement is defined as the core iron stroke G. The widths of the two second subchannels along the slider's movement direction are both J, the distance between the center lines of the two second subchannels along the slider's movement direction is F, and the dimension of the sealing surface along the slider's movement direction is T. Then, G ≥ H + J, T ≤ F + H, and T ≥ J + 2H. This allows the core iron to switch the fluid channel when the slider is driven 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 slider's stroke and improving switching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a schematic diagram of one state of the solenoid valve of the present application.

[0023] Figure 2 yes Figure 1 Enlarged view of point I.

[0024] Figure 3 It is a schematic diagram of another state of the solenoid valve of the present application.

[0025] Figure 4 yes Figure 3 Magnified view of II.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the valve seat of the solenoid valve of the present application.

[0027] Figure 6 yes Figure 5 main view.

[0028] Figure 7 yes Figure 6 AA section view.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the slider of the present application.

[0030] Figure 9 yes Figure 8 main view.

[0031] Figure 10 yes Figure 9 BB cross-sectional view.

[0032] Figure 11 It is a schematic diagram of the three-dimensional structure of the bracket of the present application.

[0033] Figure 12 yes Figure 11 main view.

[0034] Figure 13 yes Figure 12 Left view of .

[0035] The following are the descriptions of the reference numerals:

[0036] 1-Solenoid valve;

[0037] 10-valve seat;

[0038] 100-first channel;

[0039] 200-Second channel;

[0040] 101, 201-first subchannel;

[0041] 102, 202-second sub-channel;

[0042] 300-limited steps;

[0043] 400-surface;

[0044] 11- Entrance takeover;

[0045] 12-First outlet pipe;

[0046] 13-Second outlet pipe;

[0047] 14- Slider;

[0048] 140-sealing surface;

[0049] 141-Bottom;

[0050] 142-depression;

[0051] 15- core iron;

[0052] 16-Bracket;

[0053] 160-accommodation hole;

[0054] 161-connection hole;

[0055] 162, 163- bosses;

[0056] 17-reed;

[0057] 18-core iron spring;

[0058] 19-Rivets;

[0059] 20-point magnetic ring;

[0060] 21-Attractor;

[0061] 22- casing;

[0062] 23-valve cover;

[0063] H-slider outer seal width;

[0064] G-core iron stroke;

[0065] J - the width of the second sub-channel along the direction of slider movement;

[0066] F - the distance between the center lines of the two second sub-channels along the direction of movement of the slider;

[0067] T-the size of the blocking surface of the slider along the direction of movement of the slider;

[0068] E-the distance between the surface of the valve seat facing away from the outlet pipe and the central axis of the core iron;

[0069] D1-bracket thickness;

[0070] D2-boss height;

[0071] L-The dimension of the blocking surface of the slide perpendicular to the direction of movement. DETAILED DESCRIPTION

[0072] 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.

[0073] 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.

[0074] like Figures 1 to 10 As shown, 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 sealingly arranged 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.

[0075] The channel 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.

[0076] 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 side wall of the second sub-channel 102 or 202 is defined as the slider outer sealing width H (see Figure 4 ), the distance between the upper and lower limit 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 channels 100 is parallel to the arrangement direction of the second channels 200. Arranging the first channels 100 and the second channels 200 side by side vertically increases the overall flow area of ​​the channels and improves the flow rate of the fluid passing therethrough. Figure 5 The first channel 100 and the second channel 200 shown in the figure each have two channels, but may also have three, four, or five channels, etc. A plurality of channels may be provided while ensuring the strength of the valve seat 10. The number of first channels 100 and second channels 200 may be the same or different. The valve seat 10 can be machined, and each of the first channel 100 and the second channel 200 has two through holes, which can improve flow capacity and reduce processing difficulty.

[0082] In this embodiment, if Figures 8 to 10 As shown, the slider 14 further has a bottom surface 141 perpendicular to the slider's direction of motion. The dimension L of the sealing surface 140 perpendicular to the slider's direction of motion is greater than the dimension T of the sealing surface 140 along the slider's direction of motion. 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 an oblate rectangle, an oblate ellipse as shown, or any other oblate cube, as long as it can achieve sealed sliding for flow channel switching.

[0083] In this embodiment, refer to Figures 1 to 10 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 102 and 202 along the slider movement direction; this can ensure that the core iron stroke is the shortest while meeting the performance of fluid channel switching.

[0084] 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.

[0085] 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.

[0086] 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. By making the dimension T of the blocking surface 140 along the slider's motion direction equal to the thickness of the slider 14 along the slider's motion direction, the slider 14 can be manufactured more easily and the structure that mates with the slider 14 can also be manufactured more conveniently. 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, making the dimension T of the blocking surface 140 along the motion direction equal to the thickness of the slider 14 along the slider's motion direction facilitates adjustment of other interlocking dimensions to optimize the fluid channel switching of the slider 14.

[0087] In this embodiment, if Figures 8 to 10 As shown, the blocking surface 140 of the slider 14 is provided with a recess 142. The portion of the blocking surface 140 located around 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 can reduce the contact area between the slider 14 and the valve seat 10, increase the preload pressure of the slider 14 during sealing, and improve 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.

[0088] In this embodiment, refer to Figures 5 to 7The valve seat 10 has a limiting step 300 for limiting the movement of the core iron 15. The limiting step 300 provided on the valve seat 10 is used to position the core iron 15 at its lower limit, thereby improving positioning accuracy and ensuring the positional accuracy of the slider 14 when the solenoid valve switches fluid channels, thereby ensuring flow consistency.

[0089] 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.

[0090] In this embodiment, if Figures 11 to 13 As shown, 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, bolt, screw, etc., and is disposed in the connecting hole 161 of the bracket 16.

[0091] 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.

[0092] In this embodiment, if Figure 1 and Figure 3 As shown, at least one of the two outlet pipes 12 and 13 has a bend angle, which is greater than or equal to 3 degrees and can be 90 degrees. The centerlines of the bent portions of the two outlet pipes 12 and 13 are aligned. The bend improves space utilization, and the alignment of the bent portions of the pipes, meaning that the ends of the outlet pipes 12 and 13 facing away from the valve seat 10 are separated from each other, prevents the pipes from interfering with external pipe fittings. If the end of the pipe facing away from the valve seat needs to be welded to an external object, the bend also prevents the welds from being affected by the two pipes being too close together.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] Combined with attachment 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. The slider 14 is sealingly disposed on the surface 400 of the valve seat 10 facing away from the outlet pipes 12 and 13. The slider 14 has no fluid channel and is used to block the channel. 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 inside the core iron 15. The core iron spring 18 is fixed to an attractor 21. A magnetic ring 20 is disposed between the attractor 21 and the core iron 15. The core iron 15 can move up and down relative to the attractor 21.

[0099] Reference Figure 1 and Figure 2 , Figure 1 and Figure 2The state shown is a working state of the solenoid valve 1 of the present application, in which the core iron 15 is at the uppermost end. 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.

[0100] 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 and contacts the limit step 300 of the valve seat 10, you can refer to Figure 3 and Figure 4 In another working state of the valve of the present application, the slider 14 is at the lowest end, the upper fluid channels are all open, and the lower fluid channels are all blocked by the slider 14. The fluid can flow in from the inlet pipe 11 and then flow to the first outlet pipe 12 through the open fluid channel above the valve seat 10.

[0101] 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 upper end, the state at this time is Figure 1 and Figure 2 status.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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 required between the outer edge of the blocking surface 140 and the inner side wall of the second sub-channel 102 or 202 is defined as the slider outer sealing width H (see Figure 4), the distance between the extreme positions of the core iron 15's upward and downward movement is defined as the core iron stroke G, the widths of the two second sub-channels 102 and 202 along the direction of movement of the slider 14 are both J, the distance between the center lines of the two second sub-channels 102 and 202 along the direction of movement of the slider 14 is F, and the dimension of the blocking surface 140 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 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 slider's stroke and improving switching efficiency.

[0106] The above detailed description and / or illustrations illustrate exemplary embodiments of the solenoid valve 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.

[0107] 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.

[0108] In the embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise expressly defined. 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 the above terms in the embodiments based on the specific circumstances.

[0109] While the solenoid valve disclosed herein has been described in terms of various specific embodiments, those skilled in the art will recognize that the disclosure can be practiced with modification within the spirit and scope of the claims.

Claims

1. A solenoid valve, characterized in that: include: A valve seat, the valve seat being disposed between at least one inlet pipe and two outlet pipes and having two channels communicating with the inlet pipe and the outlet pipe; slider; The slider is sealably disposed on a 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 to block one of the two channels, thereby enabling the inlet pipe to communicate with the outlet pipe through the other unblocked channel. 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, and the cross-sectional area of ​​the first sub-channel is larger than the cross-sectional area of ​​the second sub-channel; 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 movement direction of the slider is defined as F. The slider has a blocking surface contacting the valve seat, and the size of the blocking surface along the movement direction of the slider is T. Then T≤F+H and T≥J+2H.

2. The solenoid valve according to claim 1, 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.

3. The solenoid valve according to claim 1, 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.

4. The solenoid valve according to claim 2, 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.

5. The solenoid valve according to claim 1, 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.

6. The solenoid valve according to claim 1, 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.

7. The solenoid valve according to claim 6, 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.

8. The solenoid valve according to claim 1, 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.

9. The solenoid valve according to claim 8, wherein: The bending angle is 90 degrees.

10. The solenoid valve according to claim 9, 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.

11. The solenoid valve according to any one of claims 1 to 10, 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.

12. The solenoid valve according to claim 1, wherein: The channel includes a kidney-shaped hole.

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