JP2021116890A - Electric drive valve and method for manufacturing the same - Google Patents

Abstract

To provide an electric drive valve that can reduce manufacturing cost by suppressing material cost and processing cost for a valve element, and to provide a method for manufacturing the same.SOLUTION: A solenoid valve 1 includes: a cylindrical valve body 10 of which upper end is blocked; a valve seat member 20 joined to a lower end of the valve body 10; and a valve element 40 accommodated in the valve body 10. The valve seat member 20 includes: a cylindrical valve seat body 21 of which upper end is provided with a valve seat 22; and an annular plate-like flange 23 continuously provided in a lower end of the valve seat body 21 and joined to the valve body 10. The valve element 40 includes: a cylindrical body part 41; and an annular plate-like valve part 42 continuously provided in the body part 41 and separated from the valve seat 22. The valve body 10, the valve seat member 20 and the valve element 40 are formed by metal press working.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electrically driven valve and a method for manufacturing the same.

A solenoid valve, which is a conventional electrically driven valve, is disclosed in Patent Document 1. The solenoid valve of Patent Document 1 has a cylindrical valve body with one end closed, a seat member joined to the other end of the valve body, and a valve housed in the valve body and separated from the valve seat of the seat member. Has a body.

Japanese Unexamined Patent Publication No. 2013-185603

The solenoid valve of Patent Document 1 is produced by cutting a brass material to form a columnar valve body. As a result, material costs and processing costs are high, leading to an increase in the manufacturing cost of solenoid valves.

Therefore, an object of the present invention is to provide an electrically driven valve and a method for manufacturing the same, which can reduce the manufacturing cost by suppressing the material cost and the processing cost of the valve body.

In order to achieve the above object, the electrically driven valve according to one aspect of the present invention includes a cylindrical valve body having one end closed, a valve seat member joined to the other end of the valve body, and the above. An electrically driven valve having a valve body housed in a valve body, wherein the valve seat member is a cylindrical valve seat body provided with a valve seat at one end and the other end of the valve seat body. It has an annular plate-shaped flange that is continuously provided and joined to the valve body, and the valve body is connected to and separated from the valve seat by being continuously provided to the cylindrical main body and the main body. It has an annulus plate-shaped or disc-shaped valve portion, and the valve body, the valve seat member, and the valve body are formed by metal stamping.

In the present invention, the valve is such that a fluid flows from the valve chamber of the valve body through the inside of the valve body to the valve opening of the valve seat member in a closed state in which the valve portion is in contact with the valve seat. A flow hole may be provided in the body, and a flow rate limiting member for limiting the flow rate of the flowing fluid may be provided inside the valve body.

In order to achieve the above object, the electrically driven valve according to another aspect of the present invention includes a cylindrical valve body having one end closed and a valve seat member joined to the other end of the valve body. An electrically driven valve having a valve body housed in the valve body, the valve seat member includes a cylindrical valve seat body provided with a valve seat at one end, and other than the valve seat body. It has an annular plate-shaped flange that is continuously provided at the end and joined to the valve body, and the valve body is attached to the cylindrical main body and the main body and is brought into contact with and separated from the valve seat. The valve body and the valve seat member are formed by metal stamping, and the main body of the valve body is metal stamped or cylindrical. Is formed by cutting, and the valve member of the valve body is formed by cutting.

In order to achieve the above object, the method for manufacturing an electrically driven valve according to another aspect of the present invention includes a cylindrical valve body having one end closed and a valve joined to the other end of the valve body. A method for manufacturing an electrically driven valve having a seat member and a valve body housed in the valve body. A metal material is metal-pressed to form the valve body, and the metal material is metal-pressed. The valve has a cylindrical valve seat body provided with a valve seat at one end, and an annular plate-shaped flange connected to the other end of the valve seat body and joined to the valve body. A seat member is formed, and a metal material is metal-pressed to form a cylindrical main body portion, and an annular plate-shaped or disc-shaped valve portion that is connected to the main body portion and is connected to and separated from the valve seat. It is characterized by forming the valve body having the above.

In order to achieve the above object, the method for manufacturing an electrically driven valve according to another aspect of the present invention includes a cylindrical valve body having one end closed and a valve joined to the other end of the valve body. A method of manufacturing an electrically driven valve having a seat member and a valve body housed in the valve body. A metal material is metal-pressed to form the valve body, and the metal material is metal-pressed. The valve has a cylindrical valve seat body having a valve seat at one end and an annular plate-shaped flange connected to the other end of the valve seat body and joined to the valve body. The seat member is formed, the metal material is stamped with metal, or the cylindrical tube is cut to form the cylindrical main body of the valve body, and the metal material or resin material is cut to obtain the above. It is characterized in that a ring plate-shaped or disc-shaped valve member attached to the main body is formed.

According to the present invention, the material cost and the processing cost of the valve body can be suppressed, and the manufacturing cost can be reduced.

It is sectional drawing of the solenoid valve which concerns on 1st Example of this invention. It is sectional drawing which shows the structure of the 1st modification of the solenoid valve of FIG. It is sectional drawing which shows the structure of the 2nd modification of the solenoid valve of FIG. It is sectional drawing which shows the structure of the 3rd modification of the solenoid valve of FIG. It is sectional drawing which shows the structure of the 4th modification of the solenoid valve of FIG. It is sectional drawing which shows the structure of the 5th modification of the solenoid valve of FIG. It is sectional drawing which shows the structure of the 6th modification of the solenoid valve of FIG. It is sectional drawing of the solenoid valve which concerns on 2nd Example of this invention. It is sectional drawing which shows the structure of the modification of the solenoid valve of FIG.

(First Example)
Hereinafter, the configuration of the solenoid valve according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. The solenoid valve described in the present specification has a configuration in which a small amount of refrigerant (fluid) flows in a closed state. The present invention can also be applied to a solenoid valve that completely stops the flow of the refrigerant in the closed state.

FIG. 1 is a cross-sectional view (longitudinal cross-sectional view) along the axis of the valve body of the solenoid valve according to the first embodiment of the present invention. 2 to 7 are cross-sectional views showing the configurations of the first modification to the sixth modification of the solenoid valve of FIG. In this specification, "upper and lower" is used to indicate the relative positional relationship of each member in each figure, and does not indicate an absolute positional relationship. The "axial direction" is a direction along the axis of the valve body, and the "diametric direction" is the radial direction of the valve body.

The solenoid valve 1 according to the first embodiment is a solenoid valve that drives a valve body by a magnetic force, and is used, for example, as a dehumidifying valve that throttles a refrigerant during a dehumidifying operation of an air conditioner. The same applies to the solenoid valve according to the second embodiment described later.

As shown in FIG. 1, the solenoid valve 1 includes a valve body 10, a valve seat member 20, a plunger 30, a valve body 40, a guide member 50, and an electromagnetic coil 60.

The valve body 10 has a cylindrical small-diameter portion 11 whose upper end (one end) is closed by a ceiling portion 11a, and a cylindrical large-diameter portion 12 which is continuously provided at the lower end (other end) of the small-diameter portion 11. It is formed in a stepped cylindrical shape. A valve chamber 14 is provided inside the large diameter portion 12. A first conduit 15 that penetrates the large diameter portion 12 in a direction orthogonal to the axis L direction and is connected to the valve chamber 14 is joined by brazing.

The valve seat member 20 has a cylindrical valve seat main body 21, a valve seat 22, and a flange 23. The valve seat main body 21 is arranged in the large diameter portion 12 of the valve main body 10. A valve opening 24 is provided inside the valve seat main body 21. The valve seat 22 is provided at the upper end of the valve seat main body 21. The valve seat 22 is a conical tapered surface whose diameter gradually decreases inward in the radial direction from above to downward. The valve seat 22 is provided with a plurality of bleed grooves 22a. In the closed state where the valve body 40 is in contact with the valve seat 22, a small amount of refrigerant flows between the valve chamber 14 and the valve port 24 through the plurality of bleed grooves 22a. The flange 23 is formed in the shape of an annular plate, and an inner peripheral edge is continuously provided at the lower end of the valve seat main body 21. The flange 23 is joined to the lower end of the large diameter portion 12 by welding. A second conduit 16 connected to the valve opening 24 is joined to the valve seat member 20 by brazing.

The plunger 30 is formed in a cylindrical shape having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 of the valve body 10. The plunger 30 is housed in the small diameter portion 11 so as to be movable in the axis L direction. The plunger 30 has a first portion 31 having a small inner diameter and a second portion 32 which is connected to the lower end of the first portion 31 and has a large inner diameter. A step portion 33, which is an annular plane, is provided between the first portion 31 and the second portion 32. The first portion 31 is provided with a pressure equalizing hole 35 penetrating from the outer peripheral surface to the inner peripheral surface.

The valve body 40 includes a cylindrical main body 41 having a closed upper end and an annular plate-shaped valve 42 having an inner peripheral edge continuously provided at the lower end (end on the valve seat 22 side) of the main body 41. ,have. A spring receiving member mounting portion 43 is provided near the upper end of the main body portion 41. The outer diameter of the spring receiving member mounting portion 43 is smaller than the outer diameter of the portion of the main body portion 41 other than the spring receiving member mounting portion 43. The valve portion 42 is provided with a seating surface 45 in contact with the valve seat 22 in the closed state. The seating surface 45 is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. A spring receiving member 44 made of an E-shaped retaining ring is attached to the spring receiving member attaching portion 43. The spring receiving member 44 moves in the axis L direction together with the main body portion 41 by being attached to the spring receiving member mounting portion 43. The outer diameter of the spring receiving member 44 is substantially the same as the inner diameter of the second portion 32 of the plunger 30. The spring receiving member 44 is housed in the second portion 32 so as to be movable in the axis L direction. The spring receiving member 44 is arranged so as to be in contact with the step portion 33 of the plunger 30.

The guide member 50 has the same shape as the guide member of Patent Document 1. The guide member 50 has a flat plate portion 51 and a guide portion 52. The flat plate portion 51 has a shape in which a disk having a diameter substantially the same as the inner diameter of the large diameter portion 12 of the valve body 10 is cut out along the chord. The flat plate portion 51 is provided with a plurality of through holes 51a. The guide portion 52 is formed in a cylindrical shape protruding upward from the center of the flat plate portion 51. The inner diameter of the guide portion 52 is substantially the same as the outer diameter of the main body portion 41 of the valve body 40. The guide portion 52 guides the movement of the main body portion 41 in the axis L direction. The guide member 50 is fixed to the upper portion of the large diameter portion 12 of the valve body 10. A valve opening spring 55, which is a compression coil spring, is arranged between the flat plate portion 51 and the spring receiving member 44. The guide portion 52 is arranged inside the valve opening spring 55.

The electromagnetic coil 60 includes a housing 61, a bobbin 62 housed in the housing 61, and a coil 63 composed of an electric wire wound around the bobbin 62. The electromagnetic coil 60 is formed in a substantially cylindrical shape, and a small diameter portion 11 of the valve body 10 is fitted inside. A leaf spring-shaped stopper 64 having a hemispherical convex portion is fixed to the upper portion of the housing 61. The electromagnetic coil 60 is fixed to the small diameter portion 11 by fitting the hemispherical convex portion of the stopper 64 into any of the hemispherical concave portions provided in the small diameter portion 11 at a plurality of locations (for example, four locations).

The solenoid valve 1 includes a valve body 10 (small diameter portion 11, large diameter portion 12), a valve seat member 20 (valve seat body 21, valve seat 22, flange 23), a plunger 30, and a valve body 40 (main body 41, valve). The axes of the guide portion 42) and the guide portion 52 of the guide member 50 are arranged so as to coincide with the axis L. That is, they are all arranged coaxially. The axis L direction coincides with the vertical direction.

Next, an example of the method for manufacturing the solenoid valve 1 according to the first embodiment described above will be described.

A metal plate such as stainless steel is metal-pressed to form a stepped cylindrical valve body 10 having a small diameter portion 11 and a large diameter portion 12.

A valve seat main body 21 in which a valve port 24 is formed inside by metal pressing a metal plate material such as stainless steel, a valve seat 22 provided at the upper end of the valve seat main body 21, and a valve seat main body 21. A valve seat member 20 having an annular plate-shaped flange 23 continuously provided at the lower end is formed.

A metal plate such as stainless steel is stamped with metal to form a cylindrical main body 41, a valve portion 42 connected to the lower end of the main body 41, and a spring receiving member provided near the upper end of the main body 41. A valve body 40 having a mounting portion 43 is formed.

A metal plate material such as stainless steel is metal-pressed to form a guide member 50 having a flat plate portion 51 and a cylindrical guide portion 52 provided in the center of the flat plate portion 51.

The first conduit 15 is brazed to the valve body 10. The second conduit 16 is brazed to the valve seat member 20. The plunger 30 is housed in the small diameter portion 11 of the valve body 10.

The main body 41 of the valve body 40 is inserted into the guide 52 of the guide member 50. The main body 41 and the guide 52 are inserted into the valve opening spring 55. The valve opening spring 55 is compressed, and the spring receiving member 44 is attached to the spring receiving member attaching portion 43 of the main body 41. As a result, the valve opening spring 55 is arranged between the spring receiving member 44 and the flat plate portion 51 of the guide member 50. Then, while inserting the main body 41 to which the spring receiving member 44 is attached inside the second portion 32 of the plunger 30, a flat plate is formed on the step 13 between the small diameter portion 11 and the large diameter portion 12 of the valve main body 10. The guide member 50 is housed in the valve body 10 so that the portions 51 are in contact with each other. Then, the guide member 50 is fixed to the valve body 10 by punching a plurality of positions on the outer peripheral surface of the large diameter portion 12.

The valve seat body 21 of the valve seat member 20 is arranged in the large diameter portion 12, the flange 23 is joined to the lower end of the large diameter portion 12 by welding, and the valve seat member 20 is attached to the valve body 10. Then, the small diameter portion 11 is fitted inside the electromagnetic coil 60. In this way, the solenoid valve 1 is completed.

Next, an example of the operation of the solenoid valve 1 described above will be described.

When the coil 63 of the solenoid valve 1 is not energized (when not energized), the plunger 30 and the spring receiving member 44 are pushed up by the valve opening spring 55 and move upward. The plunger 30 abuts on the ceiling portion 11a of the valve body 10. The valve body 40 also moves upward together with the spring receiving member 44, and the seating surface 45 of the valve portion 42 separates from the valve seat 22 to open the valve. In the valve open state, the refrigerant can freely flow between the first conduit 15 and the second conduit 16 through the valve chamber 14 and the valve opening 24.

When the coil 63 of the solenoid valve 1 is energized (when energized), the plunger 30 is magnetized by the magnetic field generated by the coil 63, and the plunger 30 and the spring receiving member 44 oppose the valve opening spring 55. It moves downward together with the spring receiving member 44. Then, the valve body 40 also moves downward together with the spring receiving member 44, and the seating surface 45 of the valve portion 42 comes into contact with the valve seat 22 to close the valve. In the valve closed state, a small amount of refrigerant flows from the valve chamber 14 to the valve port 24 through the bleed groove 22a, and the flow of the refrigerant between the first conduit 15 and the second conduit 16 is restricted.

From the above, according to the solenoid valve 1 according to the present embodiment, the valve body 10 has a cylindrical shape with the upper end closed. The valve seat member 20 includes a cylindrical valve seat main body 21 having a valve seat 22 at the upper end, a ring-shaped flange 23 which is connected to the lower end of the valve seat main body 21 and is attached to the valve main body 10. have. The valve body 40 has a cylindrical main body 41 and an annular plate-shaped valve 42 that is connected to and separated from the valve seat 22 at the lower end of the main body 41. The valve body 10, the valve seat member 20, and the valve body 40 are formed by metal stamping. As a result, in addition to the valve body 10 and the valve seat member 20, the valve body 40 is also formed by metal stamping, so that the valve body 40 is formed by cutting, as compared with a solenoid valve having a structure formed by cutting. , Material cost and processing cost can be suppressed. Therefore, the material cost and the processing cost of the valve body 40 can be suppressed, and the manufacturing cost can be reduced.

Further, in the solenoid valve 1, the length L1 of the second portion 32 of the plunger 30 in the axis L direction (that is, the length in the axis L direction from the lower end of the plunger 30 to the step portion 33) is the opening of the valve body 40. The distance from the valve state position to the valve closed position is longer than L2. By doing so, even if the valve body 40 remains in contact with the valve seat 22 for some reason and only the plunger 30 moves upward, the spring receiving member 44 is inside the second portion 32. It is possible to prevent it from falling out of the.

Next, the solenoid valves 1A to 1F of the modified example of the solenoid valve 1 according to the first embodiment described above will be described with reference to FIGS. 2 to 7. The solenoid valves 1A to 1F have a configuration in which the plungers 30A to 30F and the valve bodies 40A to 40F having different configurations are provided in place of the plunger 30 and the valve body 40 in the solenoid valve 1 according to the first embodiment. Has. Further, the solenoid valves 1B to 1F have a configuration in which a guide member 56 having a different configuration is provided instead of the guide member 50. In FIGS. 2 to 7, the same components as those of the solenoid valve 1 according to the first embodiment (including substantially the same components) are designated by the same reference numerals, and the description thereof will be omitted.

(First modification of the first embodiment)
As shown in FIG. 2, the solenoid valve 1A of the first modification has a configuration in which the valve body 40A is attached to the partition wall 36A of the plunger 30A.

The plunger 30A is formed in a cylindrical shape having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 of the valve body 10. The plunger 30A is housed in the small diameter portion 11 so as to be movable in the axis L direction. The plunger 30A is provided with a partition wall 36A that partitions the inner space in the L direction of the axis. The plunger 30A is provided with a pressure equalizing hole 35A penetrating from the outer peripheral surface to the inner peripheral surface.

The valve body 40A has a cylindrical main body portion 41A whose upper end is closed, and an annular plate-shaped valve portion 42A whose inner peripheral edge is continuously provided at the lower end of the main body portion 41A. The valve portion 42A is provided with a seating surface 45A that is in contact with the valve seat 22 in the closed state. The seating surface 45A is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The outer diameter of the upper end portion 46A of the main body portion 41A is smaller than the outer diameter of the portion of the main body portion 41A other than the end portion 46A. The valve body 40A is crushed so that the upper end portion 46A of the main body portion 41A is expanded and deformed after the upper end portion 46A of the main body portion 41A is inserted into the mounting hole 36a provided in the partition wall 36A of the plunger 30A. Then, it is fixed to the plunger 30A. The valve opening spring 55 is arranged between the partition wall 36A of the plunger 30A and the flat plate portion 51 of the guide member 50.

(Second modification of the first embodiment)
As shown in FIG. 3, the solenoid valve 1B of the second modification has a configuration in which the lower end of the plunger 30B is covered with the valve body 40B. The plunger 30B is not fixed to the valve body 40B.

The plunger 30B is formed in a cylindrical shape. The plunger 30B is housed in the small diameter portion 11 of the valve body 10 so as to be movable in the axis L direction. The plunger 30B is connected to a first portion 31B having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 and a second portion whose outer diameter is smaller than the outer diameter of the first portion 31B. It has 32B and. A step portion 33B, which is an annular plane, is provided between the first portion 31B and the second portion 32B.

The valve body 40B has a cylindrical main body portion 41B and a disk-shaped valve portion 42B that closes the lower end of the main body portion 41B. An annular protrusion 43B that projects outward in the radial direction is provided at the upper end of the main body 41B. The valve portion 42B is provided with a seating surface 45B that is in contact with the valve seat 22 in the closed state. The seating surface 45B is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. A second portion 32B of the plunger 30B is arranged inside the main body portion 41B. The protrusion 43B is arranged so as to be in contact with the step 33B of the plunger 30B. The main body 41B is provided with a pressure equalizing hole 46B penetrating from the outer peripheral surface to the inner peripheral surface.

The guide member 56 has a cylindrical guide portion 57 and an annular plate-shaped attachment portion 58 having an inner peripheral edge continuously provided at the upper end of the guide portion 57. The inner diameter of the guide portion 57 is substantially the same as the outer diameter of the main body portion 41B of the valve body 40B. The guide portion 57 guides the movement of the main body portion 41B in the axis L direction. The guide member 56 is housed in the valve chamber 14, and the mounting portion 58 is fixed to the step portion 13 of the valve body 10. A valve opening spring 55, which is a compression coil spring, is arranged between the guide member 56 and the protrusion 43B of the valve body 40B. The main body 41B of the valve body 40B is arranged inside the valve opening spring 55. The valve opening spring 55 applies a force for pushing upward to the plunger 30B via the protrusion 43B. The guide member 56 is also used in the solenoid valves 1C to 1F of the third modification to the sixth modification, which will be described later, and guides the movement of the valve bodies 40C to 40F in the axis L direction.

In the solenoid valve 1B of the second modification, the length L1 of the second portion 32B of the plunger 30B in the axis L direction (that is, the length in the axis L direction from the lower end of the plunger 30B to the step portion 33B) is the valve body. The distance from the valve open position to the valve closed position of 40B is longer than L2. By doing so, even if the valve body 40B remains in contact with the valve seat 22 for some reason and only the plunger 30B moves upward, the main body portion 41B of the valve body 40B becomes the second part. It is possible to prevent the 32B from falling off.

(Third variant of the first embodiment)
As shown in FIG. 4, the solenoid valve 1C of the third modification has a configuration in which the valve body 40C is joined to the lower end of the plunger 30C.

The plunger 30C is formed in a cylindrical shape. The plunger 30C is housed in the small diameter portion 11 of the valve body 10 so as to be movable in the axis L direction. The plunger 30C is connected to a first portion 31C having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 and a second portion whose outer diameter is smaller than the outer diameter of the first portion 31C. It has 32C and. A step portion 33C, which is an annular plane, is provided between the first portion 31C and the second portion 32C.

The valve body 40C has a cylindrical main body portion 41C and a disk-shaped valve portion 42C that closes the lower end of the main body portion 41C. The outer diameter of the main body 41C is substantially the same as the outer diameter of the second portion 32C of the plunger 30C. The upper end of the main body 41C is joined to the lower end of the second portion 32C by welding. The valve portion 42C is provided with a seating surface 45C that is in contact with the valve seat 22 in the closed state. The seating surface 45C is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The main body 41C is provided with a pressure equalizing hole 46C penetrating from the outer peripheral surface to the inner peripheral surface. A valve opening spring 55 is arranged between the guide member 56 and the step portion 33C of the plunger 30C. The main body 41C of the valve body 40C is arranged inside the valve opening spring 55. The valve opening spring 55 applies an upward pushing force to the plunger 30C.

(Fourth variant of the first embodiment)
As shown in FIG. 5, the solenoid valve 1D of the fourth modification has a configuration in which the valve body 40D is joined to the lower end of the plunger 30D whose upper end is closed.

The plunger 30D is formed in a cylindrical shape with the upper end closed. The plunger 30D is housed in the small diameter portion 11 of the valve body 10 so as to be movable in the axis L direction. The plunger 30D is connected to a first portion 31D having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 and a second portion whose outer diameter is smaller than the outer diameter of the first portion 31D. It has 32D and. A step portion 33D, which is an annular plane, is provided between the first portion 31D and the second portion 32D.

The valve body 40D has a cylindrical main body portion 41D and a ring plate-shaped valve portion 42D having an outer peripheral edge continuously provided at the lower end of the main body portion 41D. The outer diameter of the main body 41D is substantially the same as the outer diameter of the second portion 32D of the plunger 30D. The upper end of the main body 41D is joined to the lower end of the second portion 32D by welding. The valve portion 42D is provided with a seating surface 45D that is in contact with the valve seat 22 in the closed state. The seating surface 45D is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The inside of the inner peripheral edge of the valve portion 42D is a pressure equalizing hole 47D. A valve opening spring 55 is arranged between the guide member 56 and the step portion 33D of the plunger 30D. The main body 41D of the valve body 40D is arranged inside the valve opening spring 55. The valve opening spring 55 applies an upward pushing force to the plunger 30D.

(Fifth variant of the first embodiment)
As shown in FIG. 6, the solenoid valve 1E of the fifth modification has a configuration in which the valve body 40E is joined to the lower end of the plunger 30E whose lower end is closed.

The plunger 30E is formed in a cylindrical shape with the lower end closed. The plunger 30E is housed in the small diameter portion 11 of the valve body 10 so as to be movable in the axis L direction. The plunger 30E is connected to a first portion 31E having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 and a second portion whose outer diameter is smaller than the outer diameter of the first portion 31E. It has 32E and. A step portion 33E, which is an annular plane, is provided between the first portion 31E and the second portion 32E. A pressure equalizing hole 35E penetrating from the outer peripheral surface to the inner peripheral surface is provided on the upper portion of the first portion 31E.

The valve body 40E has a cylindrical main body portion 41E and a ring plate-shaped valve portion 42E having an outer peripheral edge continuously provided at the lower end of the main body portion 41E. The outer diameter of the main body portion 41E is substantially the same as the outer diameter of the second portion 32E of the plunger 30E. The upper end of the main body 41E is joined to the lower end of the second portion 32E by welding. The valve portion 42E is provided with a seating surface 45E that is in contact with the valve seat 22 in the closed state. The seating surface 45E is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The inside of the inner peripheral edge of the valve portion 42E is a pressure equalizing hole 47E. A valve opening spring 55 is arranged between the guide member 56 and the step portion 33E of the plunger 30E. The main body 41E of the valve body 40E is arranged inside the valve opening spring 55. The valve opening spring 55 applies an upward pushing force to the plunger 30E.

(Sixth variant of the first embodiment)
As shown in FIG. 7, the solenoid valve 1F of the sixth modification has a configuration in which the valve body 40F is joined to the lower end of the plunger 30F and the flow rate limiting member 70 is provided inside the valve body 40F. In the solenoid valve 1F, a plurality of bleed grooves 22a of the valve seat 22 are omitted, and a small amount of refrigerant flows inside the valve body 40F in the valve closed state.

The plunger 30F is formed in a cylindrical shape. The plunger 30F is housed in the small diameter portion 11 of the valve body 10 so as to be movable in the axis L direction. The plunger 30F is connected to a first portion 31F having an outer diameter substantially the same as the inner diameter of the small diameter portion 11 and a second portion whose outer diameter is smaller than the outer diameter of the first portion 31F. It has 32F and. A step portion 33F, which is an annular plane, is provided between the first portion 31F and the second portion 32F.

The valve body 40F has a cylindrical main body portion 41F and a ring plate-shaped valve portion 42F having an outer peripheral edge continuously provided at the lower end of the main body portion 41F. The outer diameter of the main body 41F is substantially the same as the outer diameter of the second portion 32F of the plunger 30F. The upper end of the main body 41F is joined to the lower end of the second portion 32F by welding. The valve portion 42F is provided with a seating surface 45F that is in contact with the valve seat 22 in the closed state. The seating surface 45F is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The main body 41F is provided with a flow hole 46F that penetrates from the outer peripheral surface to the inner peripheral surface. The inside of the inner peripheral edge of the valve portion 42F is a flow hole 47F. A valve opening spring 55 is arranged between the guide member 56 and the step portion 33F of the plunger 30F. The main body 41F of the valve body 40F is arranged inside the valve opening spring 55. The valve opening spring 55 applies a force to push upward on the plunger 30F.

The flow rate limiting member 70 is arranged inside the valve body 40F. The flow rate limiting member 70 has a pressing member 71, a filter 72, a flow rate limiting plate 73, and a filter 74 that are sequentially laminated in the axis L direction. The pressing member 71 is formed in a cylindrical shape having an outer diameter substantially the same as the inner diameter of the main body portion 41F of the valve body 40F. The pressing member 71 sandwiches the filter 72, the flow rate limiting plate 73, and the filter 74 between the valve portion 42F and the valve portion 42F. The filters 72 and 74 are configured by, for example, densely laminating a mesh material made of a metal wire having a fine diameter. The flow rate limiting plate 73 is arranged so as to partition the space inside the valve body 40F in the L direction of the axis. The flow rate limiting plate 73 has a small-diameter through hole that allows a small amount of refrigerant to flow.

In the solenoid valve 1F, when the valve is closed, the refrigerant flows from the valve chamber 14 through the flow hole 46F into the inside of the valve body 40F, passes through the inside of the valve body 40F, and passes through the flow hole 47F to the valve port 24. Leaked into. Then, when the refrigerant passes through the inside of the valve body 40F, the flow rate to pass through is restricted by the flow rate limiting member 70.

(Second Example)
Hereinafter, the configuration of the solenoid valve according to the second embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 is a cross-sectional view (longitudinal cross-sectional view) along the axis of the valve body of the solenoid valve according to the second embodiment of the present invention. FIG. 9 is a cross-sectional view showing a configuration of a modified example of the solenoid valve according to the second embodiment of FIG.

The solenoid valve according to the second embodiment has a structure in which a part of the valve body is formed by cutting.

The solenoid valve 1G according to the second embodiment and the solenoid valve 1H of the modified example thereof are different from the valve body 40C in the solenoid valve 1C of the third modified example of the first embodiment. , 40H. In FIGS. 8 and 9, the same components as those of the solenoid valve 1C of the third modification of the first embodiment (including substantially the same components) are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 8, the solenoid valve 1G according to the second embodiment has a structure in which the valve body 40G is formed by metal stamping and the valve member 42G is attached to the main body 41G. Have.

The valve body 40G has a cylindrical main body portion 41G whose lower end is closed, and a valve member 42G attached to the lower end of the main body portion 41G by caulking. The outer diameter of the main body 41G is substantially the same as the outer diameter of the second portion 32C of the plunger 30C. The upper end of the main body 41G is joined to the lower end of the second portion 32C by welding. The valve member 42G is provided with a seating surface 45G that is in contact with the valve seat 22 in the closed state. The seating surface 45G is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The main body 41G is provided with a pressure equalizing hole 46G penetrating from the outer peripheral surface to the inner peripheral surface.

A method of manufacturing the valve body 40G will be described. A metal plate such as stainless steel is stamped with metal to form a cylindrical main body 41G with a closed lower end. A disk-shaped valve member 42G is formed by cutting a metal material such as brass. Then, the valve body 40G is manufactured by attaching the valve member 42G to the lower end of the main body 41G by caulking. The valve member 42G may be formed of a resin material such as polytetrafluoroethylene (PTFE). In this case, the valve member 42G made of a resin material is fixed to the main body 41G by press-fitting or insert molding.

The solenoid valve 1G of the second embodiment also has the same effect as that of the solenoid valve 1 of the first embodiment.

Further, by forming the valve member 42G by cutting, it is possible to reduce the manufacturing cost and improve the processing accuracy at the same time.

(Modified example of the second embodiment)
As shown in FIG. 9, in the solenoid valve 1H of the modified example of the second embodiment, the valve body 40H is formed by cutting the cylindrical tube into the main body 41H, and the valve member 42H is formed by cutting. Has a bonded configuration.

The valve body 40H has a cylindrical main body portion 41H whose lower end is closed, and a valve member 42H joined to the lower end of the main body portion 41H by welding. The outer diameter of the main body portion 41H is substantially the same as the outer diameter of the second portion 32C of the plunger 30C. The upper end of the main body portion 41H is joined to the lower end of the second portion 32C by welding. The valve member 42H is provided with a seating surface 45H that is in contact with the valve seat 22 in the closed state. The seating surface 45H is a conical tapered surface whose diameter gradually decreases from the upper side to the lower side in the radial direction. The main body 41H is provided with a pressure equalizing hole 46H.

A method of manufacturing the valve body 40H will be described. A cylindrical main body 41H is formed by cutting a metal cylindrical tube such as stainless steel. A disk-shaped valve member 42H is formed by cutting a metal material such as brass. Then, the valve body 40H is manufactured by joining the valve member 42H to the lower end of the main body portion 41H by welding. The valve member 42H may be formed of a resin material such as polytetrafluoroethylene (PTFE). In this case, the valve member 42H made of a resin material is fixed to the main body 41H by adhesion, press fitting or insert molding.

The solenoid valve according to each of the above-described embodiments has a configuration in which only the plunger is provided as a magnetized component, but in addition to the plunger, the solenoid valve is fixed in the valve body and attracted by being magnetized to attract the plunger. It may be configured to have children. Further, although each embodiment has described an electromagnetic valve which is an electric drive valve, the present invention may be applied to a motor-driven electric valve which is an electric drive valve.

Although examples of the present invention have been described above, the present invention is not limited to these examples. As long as the gist of the present invention is not contrary to the above-described embodiment, those skilled in the art appropriately adding, deleting, or changing the design, or combining the features of the examples as appropriate are also present inventions. Is included in the range of.

(First Example)
1 ... Electromagnetic valve, 10 ... Valve body, 11 ... Small diameter part, 11a ... Ceiling part, 12 ... Large diameter part, 13 ... Step part, 14 ... Valve chamber, 15 ... First conduit, 16 ... Second conduit, 20 ... Valve seat member, 21 ... Valve seat body, 22 ... Valve seat, 22a ... Bleed groove, 23 ... Flange, 24 ... Valve mouth, 30 ... Plunger, 31 ... 1st part, 32 ... Second part, 33 ... Step part , 35 ... Pressure equalizing hole, 40 ... Valve body, 41 ... Main body, 42 ... Valve, 43 ... Spring receiving member mounting part, 44 ... Spring receiving member, 45 ... Seating surface, 50 ... Guide member, 51 ... Flat plate part , 51a ... through hole, 52 ... guide, 55 ... valve opening spring, 60 ... electromagnetic coil, 61 ... housing, 62 ... bobbin, 63 ... coil, 64 ... stopper, L ... axis, L1 ... plunger second Axial length of the portion, L2 ... Distance from the valve open position to the valve closed position of the valve body (first modification of the first embodiment)
1A ... Solenoid valve, 30A ... Plunger, 35A ... Pressure equalizing hole, 36A ... Partition, 36a ... Mounting hole, 40A ... Valve body, 41A ... Main body, 42A ... Valve, 45A ... Seating surface, 46A ... Main body Upper end (second modification of the first embodiment)
1B ... Solenoid valve, 30B ... Plunger, 31B ... 1st part, 32B ... 2nd part, 33B ... Step part, 40B ... Valve body, 41B ... Main body part, 42B ... Valve part, 43B ... Protrusion part, 45B ... Seating Surface, 46B ... Pressure equalizing hole (third modification of the first embodiment)
1C ... Solenoid valve, 30C ... Plunger, 31C ... 1st part, 32C ... 2nd part, 33C ... Step part, 40C ... Valve body, 41C ... Main body part, 42C ... Valve part, 45C ... Seating surface, 46C ... Average Press hole (fourth modification of the first embodiment)
1D ... Solenoid valve, 30D ... Plunger, 31D ... 1st part, 32D ... 2nd part, 33D ... Step part, 40D ... Valve body, 41D ... Main body part, 42D ... Valve part, 45D ... Seating surface, 47D ... Average Indentation (fifth modification of the first embodiment)
1E ... Solenoid valve, 30E ... Plunger, 31E ... 1st part, 32E ... 2nd part, 33E ... Step part, 35E ... Pressure equalizing hole, 40E ... Valve body, 41E ... Main body part, 42E ... Valve part, 45E ... Seating surface, 47E ... Pressure equalizing hole (sixth modification of the first embodiment)
1F ... Solenoid valve, 30F ... Plunger, 31F ... 1st part, 32F ... 2nd part, 33F ... Step part, 40F ... Valve body, 41F ... Main body part, 42F ... Valve part, 45F ... Seating surface, 46F ... Distribution Hole, 47F ... Flow hole, 70 ... Flow rate limiting member, 71 ... Pressing member, 72, 74 ... Filter, 73 ... Flow rate limiting plate (second embodiment)
1G ... Solenoid valve, 30C ... Plunger, 40G ... Valve body, 41G ... Main body, 42G ... Valve member, 45G ... Seating surface, 46G ... Pressure equalizing hole (Modified example of the second embodiment)
1H ... Solenoid valve, 30C ... Plunger, 40H ... Valve body, 41H ... Main body, 42H ... Valve member, 45H ... Seating surface, 46H ... Pressure equalizing hole

Claims (5)

An electrically driven valve having a cylindrical valve body with one end closed, a valve seat member joined to the other end of the valve body, and a valve body housed in the valve body.
The valve seat member includes a cylindrical valve seat body provided with a valve seat at one end and an annulus plate-shaped flange connected to the valve body and connected to the other end of the valve seat body. Have and
The valve body has a cylindrical main body portion and a ring plate-shaped or disc-shaped valve portion that is connected to the main body portion and is connected to and separated from the valve seat.
An electrically driven valve, wherein the valve body, the valve seat member, and the valve body are formed by metal stamping. A flow hole in the valve body so that a fluid flows from the valve chamber of the valve body through the inside of the valve body to the valve port of the valve seat member in a closed state in which the valve portion is in contact with the valve seat. Is provided,
The electrically driven valve according to claim 1, wherein a flow rate limiting member for limiting the flow rate of the flowing fluid is provided inside the valve body. An electrically driven valve having a cylindrical valve body with one end closed, a valve seat member joined to the other end of the valve body, and a valve body housed in the valve body.
The valve seat member includes a cylindrical valve seat body provided with a valve seat at one end and an annulus plate-shaped flange connected to the valve body and connected to the other end of the valve seat body. Have and
The valve body has a cylindrical main body portion and a ring plate-shaped or disc-shaped valve member attached to the main body portion and brought into contact with and separated from the valve seat.
The valve body and the valve seat member are formed by metal stamping.
The main body of the valve body is formed by stamping a metal or cutting a cylindrical tube.
The valve member of the valve body is an electrically driven valve characterized by being formed by cutting. A method for manufacturing an electrically driven valve having a cylindrical valve body with one end closed, a valve seat member joined to the other end of the valve body, and a valve body housed in the valve body. hand,
The metal material is stamped with metal to form the valve body.
A cylindrical valve seat body provided with a valve seat at one end by metal stamping of a metal material, and an annulus plate-shaped flange connected to the other end of the valve seat body and joined to the valve body. To form the valve seat member having
The valve body is formed by stamping a metal material to form a valve body having a cylindrical main body portion and an annular plate-shaped or disc-shaped valve portion that is connected to the main body portion and is connected to and separated from the valve seat. A method of manufacturing an electrically driven valve, characterized in that it is formed. A method for manufacturing an electrically driven valve having a cylindrical valve body with one end closed, a valve seat member joined to the other end of the valve body, and a valve body housed in the valve body. hand,
The metal material is stamped with metal to form the valve body.
A cylindrical valve seat body provided with a valve seat at one end by metal stamping of a metal material, and an annulus plate-shaped flange connected to the other end of the valve seat body and joined to the valve body. To form the valve seat member having
The metal material is stamped with metal or the cylindrical tube is cut to form the cylindrical main body of the valve body.
A method for manufacturing an electrically driven valve, which comprises cutting a metal material or a resin material to form an annular plate-shaped or disc-shaped valve member attached to the main body.

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