Electrically Driven Valve

Abstract

To provide an electric drive valve that can easily change specifications and uses.SOLUTION: An electric drive valve comprises: a valve body; a valve main body which has a valve chamber where the valve body moves in one direction, a first flow passage that is open to a first side part located in a direction crossing the one direction to communicate with the valve chamber, and a fitting hole that is open to a second side part located on one side in the one direction to the valve chamber to communicate with the valve chamber; and a sheet member which is fitted on a second side part side that is a side where the fitting hole is formed based on the valve chamber of the valve main body while partially inserted into the fitting hole, is provided with a second flow passage that communicates with the valve chamber and is open to an end part on the opposite side from the valve chamber side, and is further provided with a seating part that is provided on the valve chamber side of the second flow passage, and with / from which the valve body gets into contact and separates according to the movement in the one direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to electrically actuated valves. [Background technology]

[0002] For example, an electrically driven valve is known, as described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2023-97936 Summary of the Invention [Problem to be solved by the invention]

[0004] The electrically driven valve of Patent Document 1 is a so-called cartridge-type electromagnetic valve, and is used by being attached to a flow path block having a plurality of flow paths. This type of cartridge-type solenoid valve is equipped with a valve body having a valve seat that abuts against the main valve body, but it is necessary to prepare multiple valve bodies with different valve diameters and different structures of the seating part that contacts the main valve body depending on the specifications such as flow rate and operability and the application, which leaves room for improvement.

[0005] In consideration of the above, the present disclosure aims to provide an electrically driven valve whose specifications and uses can be easily changed. [Means for solving the problem]

[0006] An electrically driven valve according to a first aspect includes a valve disc, a valve chamber in which the valve disc moves in one direction, a valve body having a first flow path that opens to a first side located in a direction intersecting the one direction and communicating with the valve chamber, and a mounting hole that opens to a second side located on one side of the one direction relative to the valve chamber and communicating with the valve chamber, and a seat member that is attached to the second side of the valve body with a portion inserted into the mounting hole, and that is provided with a second flow path that communicates with the valve chamber and opens to an end opposite the valve chamber side, and that has a seat portion that moves toward and away from the valve disc as it moves in the one direction and is provided on the valve chamber side of the second flow path.

[0007] In the electrically driven valve according to the first aspect, the valve element can be moved within the valve chamber and brought into contact with the seating portion of the seat member to establish a closed state, and the valve element can be moved away from the seating portion to establish an open state.

[0008] In the electrically driven valve according to the first aspect, the seat member, which is separate from the valve body, is provided with a seat portion that the valve body contacts and separates with, and a second flow path, so that the specifications and uses of the electrically driven valve can be changed without changing the valve body by simply replacing the seat member with a seat portion or second flow path that has different dimensions or shapes. In other words, the electrically driven valve according to the first aspect can use a common valve body among valves with different specifications and uses, and changing the specifications and uses can be done simply by replacing the seat member, so the specifications and uses can be easily changed.

[0009] The electrically driven valve according to the second aspect is the same as that according to the first aspect. to In such an electrically driven valve, a drive section that drives the valve element is provided on the side of the valve body opposite to the second side portion.

[0010] In the electrically driven valve according to the second aspect, the valve element can be driven using the drive section. Since no seat member is disposed on the side of the valve body opposite to the second side portion, the drive unit can be easily disposed without interfering with the seat member.

[0011] The electrically driven valve according to a third aspect is the electrically driven valve according to the first or second aspect, wherein the seat member has a male thread formed on its outer periphery, the mounting hole of the valve body has a female thread into which the male thread screws, and the seat member is fixed to the valve body by twisting the male screw into the female screw.

[0012] In the electrically driven valve according to the third aspect, the seat member is fixed to the valve body by screwing the male thread of the seat member into the female thread of the valve body, so that the seat member can be prevented from coming off the valve body due to fluid pressure.

[0013] An electrically driven valve according to a fourth aspect is the electrically driven valve according to the third aspect, wherein a conical tapered portion is formed on the outer periphery of the seat member, and a tapered hole wall that is in close contact with the tapered portion is formed in the mounting hole of the valve body.

[0014] In the electrically driven valve according to the fourth aspect, the male thread of the seat member is screwed into the female thread of the valve body, and the conical tapered portion formed on the outer periphery of the seat member is brought into close contact with the tapered hole wall formed in the mounting hole of the valve body. This generates a large frictional force between the tapered portion and the tapered hole wall, making it possible to prevent the seat member screwed into the valve body from loosening.

[0015] Furthermore, since the mounting hole has a tapered hole wall and the seat member has a conical tapered portion, when the seat member is inserted into the mounting hole, the tapered portion of the seat member is guided by the tapered hole wall of the mounting hole, allowing the axis of the seat member to align with the axis of the mounting hole, making it easier to screw the male screw of the seat member into the female screw of the valve body.

[0016] The electrically driven valve according to the fifth aspect is the electrically driven valve according to any one of the first to fourth aspects, wherein the seat member has a flange formed on the side opposite to the seating portion side, and a seal member is arranged between the flange and the second side portion of the valve body.

[0017] In the electrically driven valve according to the fifth aspect, a sealing member is disposed between the flange of the seat member and the second side of the valve body, so that when the valve body of the electrically driven valve is inserted into and attached to a hole in the flow path block, the sealing member can seal between the valve body and the flow path block. Furthermore, in the electrically driven valve according to the fifth aspect, there is no need to form a groove in the seat member into which the seal member is fitted in order to dispose the seal member.

[0018] The electrically driven valve according to the sixth aspect is the electrically driven valve according to any one of the first to fifth aspects, wherein the seat member is provided with a check valve that allows the movement of fluid from the first flow path side to the second flow path side and prevents the movement of the fluid from the second flow path side to the first flow path side.

[0019] In the electrically driven valve according to the sixth aspect, the seat member is provided with a check valve that allows fluid to move from the first flow path side to the second flow path side and prevents fluid from moving from the second flow path side to the first flow path side. Therefore, for example, when the pressure on the second flow path side becomes higher than the pressure on the first flow path side, the fluid does not move to the second flow path. Road? This can prevent the liquid from flowing back into the first flow path.

[0020] An electrically driven valve according to a seventh aspect is the electrically driven valve according to any one of the first to sixth aspects, wherein the second flow path is provided with a strainer that captures foreign matter in the fluid.

[0021] In the electrically driven valve according to the seventh aspect, foreign matter in the fluid flowing through the second flow passage can be captured by the strainer, and the foreign matter can be prevented from flowing downstream of the second flow passage.

[0022] An eighth aspect of the electrically driven valve is the electrically driven valve according to any one of the first to fifth aspects, wherein the seat member includes a check valve element movably arranged within the second flow path, a check valve seat against which the check valve element abuts, a spring that biases the check valve element toward the check valve seat, and a plurality of guide portions that guide the check valve element by sliding it against the inner surface of the second flow path, and a check valve that allows fluid to move from the first flow path side to the second flow path side and prevents the fluid from moving from the second flow path side to the first flow path side is provided, and a strainer that is arranged inside the plurality of guide portions and captures foreign matter in the fluid is provided in the second flow path.

[0023] In the electrically driven valve according to the eighth aspect, the seat member is provided with a check valve that allows fluid to move from the first flow path to the second flow path and prevents fluid from moving from the second flow path to the first flow path, thereby preventing fluid from flowing back from the second flow path to the first flow path when, for example, the pressure in the second flow path becomes higher than the pressure in the first flow path.

[0024] In the electrically driven valve according to the eighth aspect, the seat member is provided with a strainer that captures foreign matter in the fluid, so that foreign matter in the fluid flowing through the second flow path can be captured by the strainer, and the foreign matter can be prevented from flowing downstream of the second flow path.

[0025] In addition, the check valve body is provided with multiple guide portions that guide the check valve body by sliding it against the inner surface of the second flow path, so that the check valve body can move smoothly inside the second flow path without tilting.

[0026] Furthermore, since the strainer is disposed inside the plurality of guide portions that guide the check valve body, the strainer can be accommodated compactly inside the second flow path. [Effects of the Invention]

[0027] As described above, the electrically driven valve of the present disclosure allows for easy modification of specifications and applications. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a cross-sectional view of a solenoid valve according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view of a solenoid valve attached to a flow path block in a fully open state (when energized). [Figure 3] FIG. 4 is an enlarged cross-sectional view showing a portion of the lower end of the sheet member. [Figure 4] FIG. 4 is a cross-sectional view of a solenoid valve according to a second embodiment. [Figure 5] FIG. 10 is a cross-sectional view of a solenoid valve according to a third embodiment. [Figure 6] FIG. 10 is a cross-sectional view of a solenoid valve according to a fourth embodiment. [Figure 7] FIG. 10 is a cross-sectional view of a solenoid valve according to a fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0029] [First embodiment] A solenoid valve 10 according to an embodiment of the present disclosure will be described with reference to FIGS. Hereinafter, embodiments for carrying out the present disclosure will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same or similar components. Note that duplicated explanations and reference numerals may be omitted in the embodiments described below. Furthermore, all drawings used in the following description are schematic, and the dimensional relationships, ratios, etc. of each element shown in the drawings do not necessarily match those in reality. Furthermore, the dimensional relationships, ratios, etc. of each element between multiple drawings do not necessarily match.

[0030] As shown in FIG. 1, the solenoid valve 10 according to this embodiment is a so-called normally closed type pilot solenoid valve that is used, for example, in the refrigeration cycle of an automotive air conditioner, and is in a closed state when a solenoid coil 18, which will be described later, is not energized.

[0031] As shown in FIG. 2, the solenoid valve 10 is a cartridge-type solenoid valve that is attached to a solenoid valve attachment hole 17 of a flow path block 16 having an inlet 12 and an outlet 14. The solenoid valve 10 may further include an electromagnetic coil 18 that generates a magnetic field that magnetizes the attractor 22 and the plunger 26. In this embodiment, the solenoid valve 10 and the electromagnetic coil 18 are separate entities. In this specification, the electrically driven valve of the present disclosure also includes one that does not include the electromagnetic coil 18.

[0032] As shown in FIG. 1, the solenoid valve 10 includes a valve block 20, an attractor 22, a main valve body 24 as an example of the valve body of the present disclosure, and a plunger 26.

[0033] (Valve block) The valve block 20 includes a valve body 28 and a seat member 30 . The valve body 28 is configured in a cylindrical shape that can be inserted into the flow path block 16, has an axial mounting hole 32 formed therethrough, and has multiple first flow paths 34 formed in the first side portion 28S, which is the outer periphery.

[0034] The seat member 30 is formed in a cylindrical shape that can be inserted into the valve body 28, and has a second flow path 36 formed therethrough in the axial direction. The first flow path 34 opens to the outer periphery of the valve body 28 and communicates with the second flow path 36 of the seat member 30. In other words, the first flow path 34 and the second flow path 36 can communicate with each other. In the valve block 20, a main valve chamber 38, which is an example of a valve chamber of the present disclosure, is provided between the first flow path 34 and the second flow path 36.

[0035] As shown in FIG. 2, the first flow passages 34 are flow passages that communicate with the inlet 12 of the flow passage block 16 when attached to the flow passage block 16, and are formed at, for example, four locations evenly spaced in the circumferential direction.

[0036] An O-ring 40 is attached to the outer periphery of the valve body 28 above the first flow path 34 to seal the gap between the valve body 28 and the flow path block 16 .

[0037] The second flow path 36 is configured to communicate with the outlet 14 of the flow path block 16 when the solenoid valve 10 is attached to the flow path block 16 .

[0038] As shown in FIG. 1, a male screw 28A that screws into the female screw 16A of the flow path block 16 is provided on the outer periphery of the valve body 28 below the first flow path 34.

[0039] Furthermore, the upper end of the outer periphery of the valve body is provided with a two-face width C that engages with a jig (not shown) that rotates the valve body .

[0040] The inner periphery of the upper end of the valve body 28 is provided with a female screw 44 into which a male screw 60A of a pipe holder 60, which will be described later, is threaded.

[0041] The mounting hole 32 of the valve body 28 has a female screw 32A formed on the upper side (main valve chamber 38 side), and a tapered hole wall 32B that expands in diameter downward is formed below the female screw 32A.

[0042] At the upper end of the seat member 30, a cylindrical seat portion 46 is formed which protrudes into the main valve chamber 38 and has a tip (upper end) which forms a seat portion (valve seat) 46A.

[0043] The seat member 30 has a male screw 48 formed below the seat portion 46 that screws into the female screw 32A of the valve body 28, and a conical tapered portion 50 formed below the male screw 48 that fits tightly against the tapered hole wall 32B formed in the mounting hole 32 of the valve body 28.

[0044] As shown in FIG. 3, the sheet member 30 has a constant diameter portion 52 formed below the tapered portion 50, with a flange 54 formed at the lower end.

[0045] An O-ring 56, which is an example of a sealing member of the present disclosure, is disposed between a lower side portion 28B (an example of a second side portion of the present disclosure) of the valve body 28 and the flange 54 of the seat member 30. As shown in FIG. 2 , the O-ring 56 provides a seal between the valve block 20 and the flow path block 16.

[0046] (Attractor) 1, the attractor 22 is disposed on the opposite side of the second flow path 36 in the axial direction of the main valve chamber 38 (the axial direction of the valve body 28). Specifically, the attractor 22 is a soft magnetic material such as magnetic stainless steel, and is fitted, for example, to one end side (the upper end side in FIG. 1) of the pipe 58. The other end side (the lower end side in FIG. 1) of the pipe 58 is supported by a pipe holder 60.

[0047] (Pipe holder) The pipe holder 60 is a member that supports the pipe 58, and is provided on the side opposite the mounting hole 32 of the valve body 28. A male screw 60A that screws into the female screw 44 of the valve body 28 is provided on the outer periphery of the pipe holder 60. The pipe holder 60 is attached to the valve body 28 by screwing the male screw 60A into the female screw 44.

[0048] An O-ring 63 is attached between the pipe holder 60 and the valve body 28. The O-ring 63 seals the gap between the pipe holder 60 and the valve body 28.

[0049] Between the main valve element 24 and the plunger 26, for example, in a portion surrounded by the valve body 28, the pipe holder 60, and the main valve element 24, there is provided a pilot valve chamber 64 which communicates with the main valve chamber 38 and which has a pilot valve seat 62. In the pilot valve chamber 64, the plunger 26 is arranged so as to be movable in the axial direction.

[0050] (electromagnetic coil) The electromagnetic coil 18 is configured with a winding and is disposed so as to be sandwiched between an upper plate 66U and a lower plate 66L of the housing 66. The electromagnetic coil 18 magnetizes the attractor 22 and the plunger 26 when a current flows through the winding. The electromagnetic coil 18, the attractor 22, and the plunger 26 are an example of a drive unit of the present disclosure that drives the main valve body 24.

[0051] A pipe 58 passes through the housing 66 and the electromagnetic coil 18, and an upper plate 66U of the housing 66 is fastened to the attractor 22 by, for example, screws 68. In this way, the housing 66 and the electromagnetic coil 18 are fixed to the pipe 58. A connector 70 for supplying power is connected to the electromagnetic coil 18.

[0052] (Main valve body) The main valve element 24 is a pilot-type valve element, and together with the seating portion 46A, constitutes the main valve 72. The main valve element 24 is provided in the main valve chamber 38, and moves axially to come into contact with or separate from the seating portion 46A. Specifically, the main valve element 24 is disposed inside the valve body 28 and is disposed so as to be slidable in the axial direction relative to the inner wall of the valve body 28 .

[0053] A piston ring 74 is attached to the side wall of the main valve element 24. A pressure equalizing hole 24A that communicates with one side and the other side in the axial direction is formed in the main valve element 24. The pressure equalizing hole 24A connects the pilot valve chamber 64 and the main valve chamber 38.

[0054] A pilot valve seat 62 and a pilot port 76 are provided in a portion of the main valve element 24 that faces the pilot valve chamber 64. The pilot port 76, located radially inward of the pilot valve seat 62, connects the pilot valve chamber 64 to the second flow path 36.

[0055] A main valve packing 78 is attached to the main valve element 24 at a portion axially facing the seating portion 46A. When the main valve packing 78 comes into close contact with the seating portion 46A, the main valve 72 is closed. A compression spring 80 is provided between the main valve element 24 and the valve body 28 (below the main valve element 24 in FIG. 1). The compression spring 80 biases the main valve element 24 in a direction away from the seating portion 46A (upper side in FIG. 1), making it easier for the main valve element 24 to move when the pressure difference when the plunger 26 is open is small.

[0056] (plunger) The plunger 26 is a soft magnetic member that is attracted to the magnetized attractor 22. Specifically, the plunger 26 is arranged axially slidably within the pipe 58. A compression spring 82 is provided between the attractor 22 and the plunger 26. The compression spring 82 biases the plunger 26 toward the main valve body 24 (the lower side in FIG. 1).

[0057] The plunger 26 comes into contact with or separates from the pilot valve seat 62 to open and close the pilot port 76. In other words, the plunger 26 and the pilot valve seat 62 form a pilot valve 84.

[0058] A pilot valve packing 86 is attached to the end of the plunger 26 on the main valve body 24 side (the lower end in FIG. 1). When the pilot valve packing 86 comes into close contact with the pilot valve seat 62, the pilot valve 84 is closed.

[0059] (Action, effect) This embodiment is configured as described above, and its operation will be described below. The solenoid valve 10 according to this embodiment is a so-called normally closed type solenoid valve, and when the solenoid coil 18 is not energized, the main valve 72 and pilot valve 84 are closed as shown in FIG.

[0060] When the electromagnetic coil 18 is energized to magnetize the attractor 22, the plunger 26 is attracted to the magnetized attractor 22 and lifted. At this time, the plunger 26 lifts against the biasing force of the compression spring 82, and the pilot valve packing 86 moves away from the pilot valve seat 62.

[0061] In this embodiment, the main valve body 24 has a pilot port 76 and a pilot valve seat 62, and the plunger 26 abuts against or moves away from the pilot valve seat 62 to open or close the pilot port 76, thereby operating the main valve body 24.

[0062] Specifically, the magnetized attractor 22 attracts the plunger 26 , and the plunger 26 moves away from the pilot valve seat 62 against the biasing force of a compression spring 82 provided between the attractor 22 and the plunger 26 .

[0063] At this time, the pressure in the pilot valve chamber 64 decreases as it escapes to the second flow path 36 through the pilot port 76, and the pressure in the main valve chamber 38 becomes higher than that in the pilot valve chamber 64. This causes the main valve element 24 to separate from the seating portion 46A and open. At this time, the biasing force of the compression spring 80 promotes the lift of the main valve element 24.

[0064] On the other hand, when the supply of current to the electromagnetic coil 18 is stopped and the attraction of the plunger 26 by the attractor 22 stops, the urging force of the compression spring 82 moves the plunger 26 in a direction away from the attractor 22, and the plunger 26 abuts against the seat 46A. This blocks the pilot port 76, and the pressure in the pilot valve chamber 64 increases and is equalized, causing the main valve element 24 to abut against the seat 46A against the urging force of the compression spring 80, closing the valve.

[0065] In the solenoid valve 10 of this embodiment, a seat member 30 that is separate from the valve body 28 is provided with a seat portion 46 having a seat portion 46A to which the main valve body 24 comes into contact and separates, and a second flow path 36.Therefore, by simply replacing the seat member 30 with one that has a different diameter dimension (valve diameter) of the seat portion 46A, a height dimension (axial dimension) of the seat portion 46, a diameter dimension of the second flow path 36, etc., the specifications and uses of the solenoid valve 10 (flow rate of fluid when the valve is open, lift dimension, etc.) can be easily changed without changing the valve body 28.

[0066] In other words, the solenoid valve 10 of this embodiment can use a common valve body 28, and changes to specifications or uses can be made simply by replacing the seat member 30, making it possible to easily change specifications and uses with a simple configuration.

[0067] It is difficult to provide the drive unit (electromagnetic coil 18, attractor 22, and plunger 26) that drives the main valve element 24 on the lower side (an example of a second side) 28B side of the valve body 28 without interfering with the seat member 30 and the flow path block 16. On the side opposite the lower side 28B side of the valve body 28, the seat member 30 and the flow path block 16 are not provided, so the drive unit can be provided without interfering with the seat member 30 and the flow path block 16.

[0068] In the solenoid valve 10 of this embodiment, the seat member 30 is fixed to the valve body 28 by screwing the male screw 48 of the seat member 30 into the female screw 32A of the valve body 28, so that the seat member 30 can be prevented from coming off the valve body 28 due to the pressure of the fluid.

[0069] In the solenoid valve 10 of this embodiment, the male screw 48 of the seat member 30 is screwed into the female screw 32A of the valve body 28, and the conical tapered portion 50 formed on the outer periphery of the seat member 30 is brought into close contact with the tapered hole wall 32B formed in the mounting hole 32 of the valve body 28, thereby generating a large frictional force between the tapered portion 50 and the tapered hole wall 32B. This makes it possible to prevent the seat member 30 screwed into the valve body 28 from loosening.

[0070] In the solenoid valve 10 of this embodiment, a tapered hole wall 32B is formed in the mounting hole 32 of the valve body 28, and a conical tapered portion 50 is formed in the seat member 30. Therefore, when the seat member 30 is inserted into the mounting hole 32, the tapered portion 50 of the seat member 30 is guided by the tapered hole wall 32B of the mounting hole 32, allowing the axis of the seat member 30 to coincide with the axis of the mounting hole 32, making it easier to screw the male screw 48 of the seat member 30 into the female screw 32A of the valve body 28.

[0071] In the solenoid valve 10 of this embodiment, an O-ring 56 is disposed between the flange 54 of the seat member 30 and the lower portion 28B of the valve body 28. As a result, when the solenoid valve 10 is inserted into the solenoid valve mounting hole 17 of the flow path block 16 and mounted, as shown in FIG. 2, the O-ring 56 can seal between the valve block 20 and the flow path block 16.

[0072] Furthermore, in the solenoid valve 10 of this embodiment, in order to attach the O-ring 56 to the valve block 20, it is not necessary to form a groove in the seat member 30 into which the O-ring 56 is fitted, and cutting of the seat member 30 is therefore easy.

[0073] [Second embodiment] A solenoid valve 110 according to a second embodiment of the present disclosure will be described with reference to Fig. 4. Note that the same components as those in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted. The solenoid valve 110 of this embodiment is a so-called normally open type pilot solenoid valve. Here, FIG. 4 is a diagram for explaining the configuration of the solenoid valve 110 according to this embodiment, showing the fully open state (when not energized).

[0074] As shown in FIG. 4, a cylindrical plunger 114 that moves a pilot valve element 112 is disposed in a pipe 116 that opens downwards at the center of the upper part of the valve body 28.

[0075] The pilot valve element 112 is connected to a plunger 114 and is configured to be movable up and down within a pipe 116 together with the plunger 114. In other words, the plunger 114 slides up and down within the pipe 116 when the electromagnetic coil 18 is activated.

[0076] An attractor 118 is provided as a means for driving the plunger 114 by the operation of the electromagnetic coil 18. When the electromagnetic coil 18 is energized, the attractor 118 becomes magnetized and attracts the plunger 114 downward, overcoming the resilience of a spring 120, which is a compression coil spring, arranged between the attractor 118 and the plunger 114.

[0077] The pipe 116 that houses the plunger 114 is open downward and is fixed to a suction element 118. The suction element 118 is supported by a pipe holder 60.

[0078] In this embodiment, the pilot valve 84 is configured using the plunger 114 and the pilot valve seat 62 .

[0079] The seat member 30 of this embodiment has different specifications from the seat member 30 of the first embodiment. Specifically, the second flow passage 36 of the seat member 30 of this embodiment is formed to have a larger diameter than the second flow passage 36 of the seat member 30 of the first embodiment. Also, the seat portion 46 of the seat member 30 of this embodiment is formed to have a lower height than the seat portion 46 of the seat member 30 of the first embodiment.

[0080] (Action, effect) Next, the operation of the solenoid valve 110 will be described. 4, which shows the state in which the electromagnetic coil 18 is not energized, when the electromagnetic coil 18 is not energized, no attractive force is generated in the attractor 118, so the spring 120 causes the plunger 114 to be lifted upward within the pipe 116, and the pilot valve 84 is in an open state. Also, the main valve element 24 is lifted upward within the main valve chamber 38 by the spring 80, and the main valve 72 is in an open state.

[0081] Next, when the electromagnetic coil 18 is energized in the state shown in FIG. 4, the attractor 118 and the plunger 114 are magnetized, and an electromagnetic attractive force is generated between them, causing the plunger 114 to be pulled down against the resilient force of the spring 120.

[0082] A pilot valve element 112 is fixed integrally to the plunger 114 below, so that the pilot valve element 112 moves up and down within the pipe 116 in the same manner as the plunger 114 moves.

[0083] The suction force of the suction element 118 pulls down the plunger 114, and at the same time, the pilot valve element 112 also moves downward. As a result, the pilot valve packing 86 provided below the pilot valve element 112 comes into contact with the pilot valve seat 62 formed on the upper side of the main valve element 24, and the pilot valve 84 is put into a closed state (i.e., the pilot port 76 is blocked).

[0084] When the pilot port 76 is closed, the only passage connecting the pilot valve chamber 64 and the main valve chamber 38 is the pressure equalizing hole 24A, eliminating the pressure difference between the two valve chambers. When the plunger 114 further presses the main valve element 24 downward and slides to its lowest point, the main valve packing 78 formed on the lower side of the main valve element 24 abuts against the seating portion 46A, closing the main valve 72. As a result, the flow path of the fluid, such as the refrigerant, is closed and the flow of the fluid from the first flow path to the second flow path is prevented.

[0085] Next, when the power supply to the electromagnetic coil 18 is stopped, the electromagnetic attraction force of the attractor 118 caused by the electromagnetic coil 18 is lost, the plunger 114 is pushed upward by the elastic force of the spring 120, the pilot valve body 112 moves upward together with the plunger 114, and the pilot valve packing 86 separates from the pilot valve seat 62 provided on the upper surface side of the main valve body 24, and the pilot valve 84 enters an open state.

[0086] As a result, the pilot valve chamber 64 is connected to the second flow path 36 via the pilot port 76 provided in the center of the main valve body 24, and the pressure in the pilot valve chamber 64 changes from high to low.

[0087] As a result, the main valve element 24 moves upward, the main valve packing 78 fixed to the underside of the main valve element 24 moves away from the seating portion 46A, and the main valve 72 enters an open state.

[0088] In the solenoid valve 110 of this embodiment, similar to the solenoid valve 10 of the first embodiment, the seat member 30 is separate from the valve body 28, and the seat portion 46 has a seat portion 46A with which the main valve element 24 comes into contact and separates, and the second flow path 36 is provided. Therefore, by simply replacing the seat member 30 with a different specification, the solenoid valve 110 can be easily changed without changing the valve body 28. 1 10 specifications and uses can be changed. Other effects are the same as those of the first embodiment.

[0089] [Third embodiment] A solenoid valve 210 according to a third embodiment of the present disclosure will be described with reference to Fig. 5. Note that the same components as those in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted. The solenoid valve 210 of this embodiment is a modified example of the solenoid valve 10 of the first embodiment, and is a so-called normally closed type pilot solenoid valve.

[0090] As shown in FIG. 5, in a solenoid valve 210 of this embodiment, a seat member 213 with a strainer 212 attached to the second flow path 36 is used.

[0091] The strainer 212 includes a cup-shaped mesh member 214 , and the opening edge portion of the mesh member 214 is fixed to the rings 216 and 218 in a state where it is sandwiched between the rings 216 and 218 .

[0092] A step 36A protruding radially inward is formed in the axially intermediate portion of the second flow passage 36. The strainer 212 is inserted from above the second flow passage 36 so that the ring 216 hits and gets caught on this step 36A, and is fixed inside the second flow passage 36.

[0093] In the electromagnetic valve 210 of this embodiment, foreign matter in the fluid flowing from the first flow path 34 to the second flow path 36 is removed by the mesh member 214. capture Therefore, foreign matter can be prevented from flowing downstream of the second flow path 36.

[0094] Other functions and effects are the same as those of Embodiment 1. In this embodiment, the mesh member 214 of the strainer 212 is cup-shaped, but it may have another shape.

[0095] [Fourth embodiment] 6, the first embodiment of the present disclosure will be described. 4 The following describes a solenoid valve 310 according to this embodiment. Note that the same components as those in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted.

[0096] A solenoid valve 310 of this embodiment is a modified example of the solenoid valve 10 of the first embodiment, and as shown in FIG. 6, a seat member 314 incorporating a check valve 312 is attached to the valve body 28.

[0097] The seat member 314 is formed in a cylindrical shape such that a portion of it can be inserted into the valve body 28, and a second flow passage 316 having a step in the axial direction is formed therethrough.

[0098] The second flow path 316 has a small diameter portion 316A on the seating portion 46A side, a first medium diameter portion 316B below the small diameter portion 316A, a valve seat 316C as an example of a check valve seat of the present disclosure having a tapered (chamfered) shape below the medium diameter portion 316B, a large diameter portion 316D below the valve seat 316C, and a second medium diameter portion 316E below the large diameter portion 316D.

[0099] A check valve 318 is inserted into the second flow path 316. The check valve 318 has a flange 318A at the middle in the longitudinal direction, and an O-ring 320 is attached to the outer periphery of the flange 318A.

[0100] A plurality of guide portions 318B are formed on the upper portion of the flange 318A to slide on the inner peripheral surface of the first medium diameter portion 316B and guide the check valve element 318 in the axial direction.

[0101] A disk-shaped spring bearing 321 having a plurality of holes (not shown) formed therein is fixed by a retaining ring 322 to the second medium diameter portion 316E.

[0102] Between the spring receiver 321 and the flange 318A of the check valve body 318, a compression coil spring 324, which is an example of a spring of the present disclosure, is provided.

[0103] A guide post 318C is formed at the bottom of the flange 318A. The guide post 318C is inserted into the compression coil spring 324 and guides the compression coil spring 324.

[0104] The check valve element 318 is biased upward by a compression coil spring 324 , and an O-ring 320 of the check valve element 318 is pressed against a valve seat 316 C of the second flow path 316 . The check valve element 318 and the valve seat 316C constitute the check valve 312 of this embodiment.

[0105] The check valve 312 is connected to the second flow path 34 from the first flow path 34 side. 1 When the fluid moves to the second flow path 36 side, the check valve element 318 moves in the second flow path 36 side against the biasing force of the compression coil spring 324. 1 6 downstream side, the O-ring 320 moves away from the valve seat 316C, and the fluid flows into the second flow path 3 1 It flows downstream of 6.

[0106] On the other hand, when the valve is closed, and the second flow path 3 1 When the pressure on the second flow path 36 side becomes higher than that on the first flow path 34 side, the O-ring 320 of the check valve body 318 is pressed against the valve seat 316C, and the second flow path 3 1 This can prevent the movement of fluid from the valve 6 side to the first flow path 34 side, thereby suppressing backflow of fluid to the upstream side of the solenoid valve.

[0107] The check valve 312 is provided downstream of the seating portion 46A with which the main valve packing 78 of the main valve body 24 abuts, so that even if the second flow path 3 1 Even if the pressure on the 6 side becomes high, the pressure is prevented from acting on the main valve body 24, and the solenoid valve 310, which is in a closed state, is prevented from opening.

[0108] In the solenoid valve 310 of this embodiment, the check valve 312 for suppressing backflow is built into the seat member 314, so compared to when a check valve is provided outside the solenoid valve, no space is required outside the solenoid valve, and the entire flow path system can be made compact. In addition, there is no need to provide a check valve in the flow path block 16, so the structure of the flow path block 16 to which the solenoid valve 310 is attached does not become complicated. Other functions and effects are the same as those of the first embodiment.

[0109] [Fifth embodiment] A solenoid valve 410 according to a fifth embodiment of the present disclosure will be described with reference to Fig. 7. Note that the same components as those in the above-described embodiments are given the same reference numerals, and descriptions thereof will be omitted.

[0110] As shown in FIG. 7, a solenoid valve 410 of this embodiment includes both the strainer 212 of the third embodiment and the check valve 312 of the fourth embodiment.

[0111] In the solenoid valve 410 of this embodiment, the strainer 212 is disposed inside a plurality of guide portions that guide the check valve body, so that the strainer 212 is connected to the second flow path 3. 1 It can be stored compactly inside the 6.

[0112] Other functions and effects are the same as those of the solenoid valve 210 of the third embodiment and the solenoid valve 310 of the fourth embodiment.

[0113] [Other embodiments] The above describes one example of an embodiment of the present disclosure, but the embodiment of the present disclosure is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit of the present disclosure.

[0114] In the solenoid valve 10 of the first embodiment, the seat member 30 is fixed to the valve body 28 by screwing the male screw 48 of the seat member 30 into the female screw 32A of the valve body 28, but the present disclosure is not limited to this, and for example, the seat member 30 may be fixed to the valve body 28 with a screw.

[0115] In the third to fifth embodiments, a normally closed type solenoid valve has been described, but the third to fifth embodiments can also be configured as a normally open type solenoid valve, like the second embodiment.

[0116] The solenoid valves in the first to fifth embodiments are so-called pilot type solenoid valves, but may be ordinary direct acting type solenoid valves.

[0117] The solenoid valves of the first to fifth embodiments are configured to drive the main valve element 24 by a magnetic drive unit consisting of a plunger, an attractor, an electromagnetic coil, etc. However, they may also be configured as a so-called motor-operated valve in which the main valve element 24 is driven by a drive device such as a motor. In particular, the motor-operated valve can be used in a circuit in which air flows in from the seat member 30 side (a so-called reverse flow circuit).

[0118] In the solenoid valve 410 according to the fifth embodiment, the strainer 212 is arranged inside the plurality of guide portions 318B that guide the check valve body 318, but the strainer 212 may also be arranged at a position away from the guide portions 318B.

[0119] In the above embodiment, the fluid flows into the solenoid valve from the first flow path 34 and flows out from the second flow path 36, but in some cases, the fluid may flow in from the second flow path 36 and flow out from the first flow path 34. [Explanation of symbols]

[0120] 10. Solenoid valve (electrically driven valve) 18 Electromagnetic coil (drive unit) 22 Suction element (drive unit) 24 Main valve body (valve body) 26 Plunger 28 Valve body 28B Lower part (second side part) 30 Sheet material 32 Mounting hole 32A female screw 32B Tapered hole wall 34 First Channel 36 Second Flow Path 38 Main valve chamber (valve chamber) 46A Seat 48 Male screw 50 Tapered section 52 Constant diameter section 5 4 flange 56 O-ring (sealing material) 110 Solenoid valve (electrically driven valve) 210 Solenoid valve (electrically driven valve) 212 Strainer 213 Sheet material 310 Solenoid valve (electrically driven valve) 312 Check valve 314 Sheet material 316C Valve seat (check valve seat) 318 Check valve 318B Guide part 324 Compression coil bar Yes ( Spring)

Claims

1. A valve body, a valve body including a valve chamber in which the valve element moves in one direction, a first flow path that opens to a first side portion located in a direction intersecting the one direction and that communicates with the valve chamber, and a mounting hole that opens to a second side portion located on one side of the one direction relative to the valve chamber and that communicates with the valve chamber; a seat member attached to the second side of the valve body with a portion inserted into the mounting hole, the seat member having a second flow path communicating with the valve chamber and opening at an end opposite to the valve chamber side, the seat member having a seat portion on the valve chamber side of the second flow path that contacts and separates with the valve body as it moves in the one direction; Equipped with The seat member has a male screw formed on the outer periphery thereof, The mounting hole of the valve body is formed with a female screw into which the male screw is threaded, The seat member is fixed to the valve body by screwing the male screw into the female screw, The seat member has a conical tapered portion formed on its outer periphery, The mounting hole of the valve body has a tapered hole wall that is in close contact with the tapered portion. Electrically operated valve.

2. a drive unit that drives the valve body is provided on the opposite side of the valve body from the second side portion; The electrically driven valve according to claim 1 .

3. The seat member has a flange formed on the opposite side to the seating portion, a seal member disposed between the flange and the second side of the valve body. The electrically driven valve according to claim 1 .

4. The seat member is provided with a check valve that allows fluid to move from the first flow path side to the second flow path side and prevents fluid from moving from the second flow path side to the first flow path side. The electrically driven valve according to claim 1 .

5. The second flow path is provided with a strainer that captures foreign matter in the fluid. The electrically driven valve according to claim 1 .

6. The sheet member includes: a check valve including a check valve element movably arranged in the second flow path, a check valve seat against which the check valve element abuts, a spring that biases the check valve element toward the check valve seat, and a plurality of guide portions that guide the check valve element by sliding it along an inner surface of the second flow path, and which allows movement of fluid from the first flow path side to the second flow path side and prevents movement of the fluid from the second flow path side to the first flow path side, The second flow path includes: a strainer disposed inside the plurality of guide portions to capture foreign matter in the fluid; The electrically driven valve according to any one of claims 1 to 5.

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