Solenoid valve

Abstract

The utility model 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 of 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 valve is a control device used in refrigeration equipment. Solenoid valves in related technologies mainly use the method of separating from the valve port to achieve the switching of the circulation channel, so that when the circulation channel is switched, the movement distance required for the structure blocking the channel to separate from the valve port is relatively long, and it takes a large force to separate the structure blocking the channel from the valve port by direct pulling. Utility Model Content

[0003] The main purpose of the present application is to overcome at least one defect 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, the valve comprising 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 sealingly arranged on the surface of the valve seat facing away from the outlet pipe, the slider is used to block the channel, and 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 comprises a first sub-channel connected to the outlet pipe and a second sub-channel for connecting 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 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, then G≥H+J. The distance between the center lines of the two second sub-channels along the slider movement direction is defined as F, the slider has a blocking surface that contacts the valve seat, and the size of the blocking surface along the slider movement direction is T, then T≤F+H and T≥J+2H.

[0006] According to one of the embodiments of the present application, a dimension of the blocking surface along a direction perpendicular to the movement direction of the slider is larger than a dimension of the blocking surface along 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 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 blocking surface along the slider movement direction is equal to the sum of the distance F between the center lines of the two second sub-channels along the slider movement direction and the outer sealing width H of the slider. 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 outer sealing width H of the slider.

[0008] According to one of the embodiments of the present application, the blocking surface of the slider is provided with a recess, and a portion of the blocking surface located on the peripheral side of the recess is in sealing contact with the surface of the valve seat.

[0009] According to one of the embodiments of the present application, a reed is provided on the surface of the slider facing away from the valve seat, and 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 via 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 via a connecting member.

[0011] According to one embodiment of the present application, the bracket is in the shape of a sheet with a thickness of D1, a boss is provided on the surface of one end of the bracket on which the slider is provided 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 connecting 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 parts 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 a sliding direction of the slider, the first channel and the second channel are both multiple, and an arrangement direction of the first channel is parallel to an arrangement direction of the second channel.

[0016] According to one embodiment of the present application, the channel includes a waist-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 the present application includes a valve seat, a slider and a core iron. The valve seat is arranged between at least one inlet pipe and two outlet pipes, and has two channels connecting the inlet pipe and the outlet pipe. The outlet pipes are arranged one by one with the channels. The two channels connected to the outlet pipes can realize that the fluid can flow out from different channels after entering the valve cavity from the inlet pipe, meeting the needs of actual production.

[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 to block one of the two channels, so that the inlet pipe can be connected 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 the switching of the flow channel. In order to improve the sealing effect between the module and the valve seat, the slider and the valve seat are usually polished to reduce the friction coefficient between the slider and the valve seat. The friction coefficient of 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 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.

[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 greater than the cross-sectional area 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 value required between the outer edge of the blocking surface and the inner wall of the second subchannel is defined as the slider outer sealing width H, the distance between the extreme positions of the core iron moving up and down is defined as the core iron stroke G, the width of the two second subchannels along the slider movement direction is J, the distance between the center lines of the two second subchannels along the slider movement direction is F, and the dimension of the blocking surface along the slider movement direction 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 slider stroke and improving the switching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 exemplary illustrations of the present application and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[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 An enlarged view of point 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 three-dimensional structural schematic diagram of the slider of the present application.

[0030] Fig. 9 yes Figure 8 main view.

[0031] Fig.10 yes Fig. 9 BB section view.

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

[0033] Fig.12 yes Fig.11 main view.

[0034] Fig.13 yes Fig.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 subchannel;

[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 subchannel along the direction of movement of the slider;

[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 slider movement direction;

[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 changes in different embodiments without departing from the scope of the present application, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present application.

[0073] In the following description of different exemplary embodiments of the present application, reference is made to the accompanying drawings, which form a part of the present application, and in which different exemplary structures, systems and steps that can realize multiple aspects of the present application are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present application. When introducing the 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 the meaning of open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. Although the terms "upper", "lower", "between" etc. can be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be understood as requiring a specific three-dimensional direction of the 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 one 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 greater than the cross-sectional area of ​​the second sub-channel 102, 202.

[0076] The slider 14 has a blocking surface 140 contacting 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 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 ), 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 J respectively, 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, 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 of the 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 of the two is less than 1, so the pulling force to pull the slider 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.

[0078] The solenoid valve 1 of the present application adopts a channel whose cross-sectional area at one end connecting the outlet pipes 12 and 13 is larger than the channel whose cross-sectional area is connected to the inlet pipe 11, so that 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 in the process of flowing 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 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 fully 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 a shell, and the valve seat 10, the slider 14 and the core iron 15 are all placed inside the sleeve 22. An attractor 21 is arranged inside one end of the sleeve 22, and the core iron 15 is connected to the slider 14 through a bracket 16. A core iron spring 18 is arranged inside the core iron 15, and the core iron spring 18 is fixed to the attractor 21. A magnetic ring 20 is arranged 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 a valve cover 23.

[0081] In this embodiment, the two channels include a first channel 100 and a second channel 200 arranged at intervals 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. The first channels 100 and the second channels 200 arranged side by side can increase the overall flow surface of the channel and improve the flow rate of the fluid passing through. Figure 5 The first channel 100 and the second channel 200 shown in the figure are both two, and can also be three, four or five, etc., and can be provided with a plurality of channels 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 machining.

[0082] In this embodiment, if Figures 8 to 10 As shown, the slider 14 also has a bottom surface 141 perpendicular to the slider movement direction, and the dimension L of the blocking surface 140 along the direction perpendicular to the slider movement direction is greater than the dimension T of the blocking surface 140 along the slider movement direction. The overall flat slider shape can make the slider 14 move up and down a shorter distance to complete the switching of the upper and lower flow channels, which can improve the switching efficiency, reduce the power consumption required for switching, and save energy. The shape of the slider 14 can be a flat rectangle, or a flat ellipse as shown in the figure, or any flat cube, as long as it can achieve sealed sliding to switch the flow channels.

[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 make the core iron stroke the shortest under the premise of satisfying 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 the fluid channel can be switched, the fluid channel can be fully opened, and the blocked fluid channel is completely blocked.

[0085] And / or, the dimension T of the blocking surface 140 along the slider movement direction is equal to the sum of the width J of the two second sub-channels 102, 202 along the slider movement direction and twice the slider outer sealing width H. This is the minimum slider thickness when the slider 14 satisfies the conditions that the fluid channel can be switched, the fluid channel can be fully opened, and the blocked fluid channel is completely blocked.

[0086] In this embodiment, refer to Figures 1 to 10 , the dimension T of the blocking surface 140 along the direction of movement of the slider is equal to the thickness of the slider 14 along the direction of movement of the slider. The dimension of the blocking surface 140 along the direction of movement of the slider is equal to the thickness of the slider 14 along the direction of movement of the slider, which can make the processing of the slider 14 relatively simple, and can also make the processing of the structure installed with the slider 14 convenient. In some other embodiments, the dimension of the blocking surface 140 of the slider 14 along the direction of movement of the slider may not be equal to the thickness of the slider 14 along the direction of movement of the slider. For example, if it is less than, the lowermost edge of the blocking surface 140 of the slider 14 is similar to a notch shape relative to the bottom surface 141 of the slider 14; if it is greater than, the lowermost edge of the blocking surface 140 of the slider 14 is similar to a convex shape relative to the bottom surface 141 of the slider 14. In this embodiment, the dimension T of the blocking surface 140 along the direction of movement is equal to the thickness of the slider 14 along the direction of movement of the slider, which is convenient for adjusting other mutually matching dimensions to achieve the optimization of the switching fluid channel 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, and the portion of the blocking surface 140 located on the peripheral side of the recess 142 is in sealing contact with the surface 400 of the valve seat 10. The blocking surface 140 of the slider 14 is provided with the recess 142, which can reduce the contact area between the slider 14 and the valve seat 10, increase the pre-tightening pressure of the slider 14 when sealing, and at the same time improve the anti-deformation strength of the slider 14. In addition to the blocking surface 140, the side of the slider 14 opposite to the blocking surface 140 can 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, which is used to limit the movement of the core iron 15. The limiting step 300 is provided on the valve seat 10 to realize the positioning of the lower limit of the core iron 15, thereby improving the positioning accuracy and ensuring the position accuracy of the slider 14 when the solenoid valve switches the fluid channel, thereby ensuring the consistency of the flow rate.

[0089] In this embodiment, a reed 17 is provided on the surface 400 of the slider 14 facing away from the valve seat 10, and 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 against the valve seat 10, so that the slider 14 always seals and contacts the surface 400 of the valve seat 10 when sliding.

[0090] In this embodiment, if Figures 11 to 13 As shown, the slider 14 is connected to the core iron 15 through a bracket 16, one end of the bracket 16 has a receiving hole 160, the slider 14 is received in the receiving hole 160, and the other end of the bracket 16 is connected to the core iron 15 through a connecting piece. The connection between the slider 14 and the core iron 15 is achieved through the bracket 16, and the slider 14 slides accurately and has a simple structure. The connecting piece can be a rivet 19, a bolt, a screw, etc., and the connecting piece is set in the connecting hole 161 of the bracket 16.

[0091] In this embodiment, the bracket 16 is in sheet shape, with a thickness of D1, and a surface 400 of the bracket 16 on which the slider 14 is disposed facing the valve seat 10 is provided with bosses 162 and 163, and the protruding height of the bosses 162 and 163 is D2, and the distance between the surface 400 of the valve seat 10 facing away from the outlet pipes 12 and 13 and the central axis of the core iron 15 is E, then: E≥0.5D1+D2. In this way, it can be ensured that no interference occurs when the solenoid valve 1 is assembled as a whole.

[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 bending angle, which is greater than or equal to 3 degrees and can be 90 degrees. The center lines of the bent parts of the two outlet pipes 12 and 13 are on a straight line. The bending of the pipe can improve the space utilization rate, and the bent parts of the pipe are on a straight line, that is, the ends of the outlet pipes 12 and 13 away from the valve seat 10 are away from each other, so that the external pipes connected to the outlet pipes do not affect each other. The end of the pipe away from the valve seat needs to be welded to an external object, and the bending of the pipe can also avoid the influence of the welding of the two pipes due to being too close.

[0093] In this embodiment, the first channel 100 and the second channel 200 are both circular holes. In some other embodiments, they may also be waist-shaped holes. Alternatively, the first channel 100 may be a circular hole and the second channel 200 may be a waist-shaped hole; or the first channel 100 may be a waist-shaped hole and the second channel 200 may be a circular hole. The waist-shaped hole can increase the cross-sectional area of ​​the fluid channel and improve the flow rate.

[0094] In this embodiment, the portion of the surface 400 of the valve seat 10 facing away from the outlet pipes 12 and 13 corresponding to the movement of the slider 14 is a plane. The portion of the surface 400 of the valve seat 10 that matches the slider 14 is set to be a plane, which is beneficial to improving the sealing effect of the slider 14, and can make the slider 14 slide smoothly, reducing the force of the core iron 15 pulling the slider 14.

[0095] In this exemplary embodiment, the solenoid valve proposed in this application is described by taking a direct-acting three-way solenoid valve as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of this application to other types of solenoid valves, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle 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 many types of solenoid valves that can adopt the principles of the present application. It should be clearly understood that the principles of the present application are by no means 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 the present application. The working process of the solenoid valve proposed in the present application will be exemplarily described below.

[0098] Combined with Figures 1 to 13 The solenoid valve 1 proposed in the present application is installed between an inlet pipe 11 and at least two outlet pipes 12, 13. The valve seat 10 is arranged at the end of the outlet pipes 12, 13 and has at least two channels connecting the inlet pipe 11 and the outlet pipes 12, 13. 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. The core iron 15 drives the slider 14 to move. The core iron 15 is connected to the slider 14 through the bracket 16. The core iron spring 18 is arranged inside the core iron 15. The core iron spring 18 is fixed to the attractor 21. A magnetic ring 20 is arranged 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, 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, while the lower fluid channels are all open, and 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 lowermost 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 flow through the open fluid channel on the upper part of the valve seat 10 to the first outlet pipe 12.

[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 uppermost 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 to pull the slider 14 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. In addition, the core iron has a smaller stroke, 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 one by one 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 part 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 to achieve 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 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 greater than the cross-sectional area of ​​the second sub-channel 102, 202. The cross-sectional area of ​​the channel connecting one end of the outlet pipes 12, 13 is larger than the cross-sectional area of ​​the channel connecting one end of the inlet pipe 11, so that 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 improve 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 contacting 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 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 moving up and down is defined as the core iron stroke G, the widths of the two second sub-channels 102 and 202 along the moving 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 moving direction of the slider 14 is F, and the dimension of the blocking surface 140 along the moving direction 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 stroke and improving the switching efficiency.

[0106] The exemplary embodiments of the solenoid valve proposed in the present application are described and / or illustrated in detail above. However, the embodiments of the present application are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "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 are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments can be understood according to the specific circumstances.

[0109] Although the solenoid valve proposed in the present application has been described according to various specific embodiments, those skilled in the art will recognize that the present application can be implemented with modifications within the spirit and scope of the claims.

Claims

1. A solenoid valve, characterized in that: include: A valve seat, the valve seat is disposed between at least one inlet pipe and two outlet pipes, and has two channels connecting the inlet pipe and the outlet pipe; slider; 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 to block 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, and the cross-sectional area of ​​the first sub-channel is greater 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 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, then G≥H+J. Define the distance between the center lines of the two second sub-channels along the moving direction of the slider as F, the slider has a blocking surface contacting the valve seat, and the size of the blocking surface along the moving direction of the slider is T, then T≤F+H and T≥J+2H.

2. The solenoid valve according to claim 1, characterized in that 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, characterized in that: 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 blocking 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 of 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, characterized in that: 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, characterized in that: A reed is arranged 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, characterized in that: The slider is connected to the core iron via 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 via a connecting piece.

7. The solenoid valve according to claim 6, characterized in that: The bracket is in sheet shape with a thickness of D1. A boss is provided on the surface of one end of the bracket where the slider is provided and faces 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, characterized in that: 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, characterized in that: The bending angle is 90 degrees.

10. The solenoid valve according to claim 9, characterized in that: 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 comprises a first channel and a second channel which are arranged at intervals along the sliding direction of the slider, the first channel and the second channel are both in plurality, and the arrangement direction of the first channel is parallel to the arrangement direction of the second channel.

12. The solenoid valve according to claim 1, characterized in that: The passage includes a waist-shaped hole.

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