JP2018168924A - Switching valve and manufacturing method thereof - Google Patents

Abstract

To provide a switching valve comprising a ring-shaped or disk-shaped elastic rubber valve member having an automatic alignment assembly structure to a valve body.SOLUTION: The present invention relates to a switching valve 100 comprising: a valve body 30 in which an inflow port 31 and an outflow port 32 for a fluid are formed and a main valve chamber 33 is provided therebetween; a main valve body 40 which is accommodated in the main valve chamber 33 in a slidable manner; a plunger 60; and a solenoid 80 which drives the plunger 60. A main valve part 10 consists of: a main valve packing 41 as an elastic rubber valve member that is provided at a lower side of the main valve body 40; and a main valve seat 35 which is formed between the inflow port 31 and the outflow port 32 of the valve body 30. On an outer peripheral wall surface and/or an inner peripheral wall surface of the main valve packing 41, at least three or more projections 47, 47, 47.../48, 48, 48... are formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an on-off valve, and more particularly to an on-off valve provided with an elastic rubber valve member having an automatic centering assembly structure with respect to a valve body, and a manufacturing method thereof. The on-off valve of the present invention includes an electromagnetic on-off valve and an electric on-off valve.

  In general, there are electromagnetic on-off valves, electric on-off valves, and the like as on-off valves that control the flow of fluid by opening and closing the valves. Among them, the electromagnetic on-off valve is a valve that drives a valve body that opens and closes the flow path with respect to the valve seat by electromagnetic force, and drives a mover called a plunger that is driven by turning on and off the solenoid. The movement causes the valve body to operate to control the opening and closing of the flow path, and it is used in a wide range of fields.

  The opening / closing control of the flow path in the on / off valve is achieved by the relative movement of the valve body that contacts and separates from the valve seat, and there are various configurations of the valve body that moves relative to the valve seat. . The present invention is directed to an on-off valve having an annular or disc-shaped valve member made of elastic rubber on a contact surface of a valve body that contacts a valve seat.

  If such on-off valves are classified according to the drive system of the valve body, it is classified into an electric on-off valve and an electromagnetic on-off valve from the type of power, and further classified into a direct acting type and a pilot type from the form of power transmission. The The type in which the valve body of the main valve is directly connected to the drive plunger is called `` direct acting type '', and the type that controls the valve by driving the valve body of the main valve through the diaphragm or piston by the fluid pressure is called `` Pilot '' This is called “expression”. Here, the direct-acting type is directly controlled, and the pilot-type is slower in operation time than the direct-acting type, but it is possible to reduce the electric power for operating the solenoid. wide.

The present invention is applicable to both an electric on-off valve and an electromagnetic on-off valve, and is applicable to both a direct acting type and a pilot type.
In the present specification, the case where the present invention is applied to the main valve portion and the pilot valve portion of the pilot type electromagnetic on-off valve will be described as an example. It is not limited to on-off valves.

What is disclosed in Japanese Patent Application Laid-Open No. 2004-340560 (Patent Document 1) is a composite valve in which an electromagnetic valve portion and a differential pressure valve portion are integrally provided in one valve body. A valve body, an inlet, a first outlet, a second outlet, an upper valve chamber communicating with the inlet and having a main valve seat, a lower valve chamber communicating with the first outlet, and an upper valve A refrigerant introduction chamber having a differential pressure valve seat communicating with the chamber and a back pressure introduction chamber communicating with the lower valve chamber are formed. A main valve body that is opened and closed by an electromagnetic valve portion is provided between the upper valve chamber and the lower valve chamber. Between the refrigerant introduction chamber and the back pressure introduction chamber, a differential pressure valve body that opens and closes due to the differential pressure of both chambers is provided. The differential pressure valve portion composed of the refrigerant introduction chamber, the back pressure introduction chamber, and the differential pressure valve body is arranged so as not to be located on the outer surface of the valve body. The first outlet, the back pressure introduction chamber, the differential pressure valve body, the refrigerant introduction chamber, and the second outlet are arranged in a substantially straight line in this order.
In Japanese Patent Application Laid-Open No. 2004-340560 (Patent Document 1), a packing is provided below the main valve body, and a valve packing is also provided below the valve cylinder of the pilot valve portion. Is inherent.

JP 2004-340560 A

  In a conventional on-off valve having an annular or disc-shaped valve member made of elastic rubber that is caulked and fixed to the lower surface of the valve body, the valve member is caulked to the lower position of the valve body to fix the valve member However, even if you work carefully, an unintended force may be applied, resulting in uneven processing. Also, depending on the accuracy of the parts, the valve member may be eccentric with respect to the valve body, and proper fixing may not be possible. It was. In other words, in an on-off valve provided with an elastic rubber annular or disk-shaped valve member on the valve body, the elastic rubber valve member is eccentric during caulking, and an appropriate clearance is provided around the valve member. There was a problem that it could not be maintained.

  Further, when trying to increase the manufacturing dimensional accuracy of the elastic rubber valve member in order to suppress the eccentricity of the elastic rubber valve member, accuracy exceeding the general manufacturable dimensional accuracy is required. It becomes difficult to manufacture the member, and thus the on-off valve itself using the valve member. The present invention is to solve the conventional problems as described above.

  Hereinafter, the configuration of the invention as a means for solving the problems of the present invention will be described. In the description of the means for solving the problems of the present invention, the names of parts are designated according to specific examples. A description will be given later with reference numerals. This is intended to facilitate understanding of technical matters, but the technical means of the present invention is not limited to the structure shown in the drawings of the embodiments. In addition, in this specification, the term “and / or” means, for example, the meaning of the term “A and / or B” means (1) the meaning of A and B and (2) the meaning of A or B. Used to include both meanings. Further, the following “means for solving the problems” are described with reference numerals, but these are for facilitating understanding and do not limit the technical scope of the invention. .

The on-off valve 100 of the present invention has a fluid inlet 31 and a fluid outlet 32 formed therein, a main valve chamber 30 provided with a main valve chamber 33 therebetween, and a main valve chamber slidably accommodated in the main valve chamber 33. An on-off valve 100 comprising a valve body 40, a plunger 60 for operating the main valve body 40, and a solenoid 80 for driving the plunger 60;
The main valve portion 10 includes an annular main valve packing 41 as an elastic rubber valve member provided on the lower surface side of the main valve body 40, the inlet 31 and the outlet 32 of the valve body 30. Constituted by a main valve seat 35 formed therebetween,
On the outer peripheral wall surface and / or inner peripheral wall surface of the annular main valve packing 41, protrusions 47, 47, 47... / 48, 48, 48. And

  Further, the on-off valve 100 of the present invention is provided with a plate-like support member 52 of the main valve packing 41 on the inner peripheral side of the annular main valve packing 41, and the plate-like support member 52 also has the main valve body 40. It is characterized by caulking and fixing.

The on-off valve 100 of the present invention is a pilot-type on-off valve 100 including a main valve portion 10 and a pilot valve portion 20,
The pilot type on-off valve 100 has a fluid inlet 31 and a fluid outlet 32 formed therein, a main valve chamber 30 having a main valve chamber 33 therebetween, and a main valve chamber 33 slidably accommodated in the main valve chamber 33. A valve body 40; a pilot valve body 70 connected to the plunger 60; a solenoid 80 for driving the plunger 60 connected to the pilot valve body 70; and a suction element 90 for sucking the plunger 60. ,
The main valve portion 10 includes an annular main valve packing 41 as an elastic rubber valve member provided on the lower side of the main valve body 40, the inlet 31 and the outlet 32 of the valve body 30. The main valve seat 35 formed between
The pilot valve portion 20 includes a disk-like pilot valve packing 71 as an elastic rubber valve member provided on the lower side of the pilot valve body 70, and a pilot valve seat formed on the upper side of the main valve body 40. 42,
At least three protrusions 47, 47, 47..., 48, 48, 48... Are formed on the outer peripheral wall surface and / or the inner peripheral wall surface of the annular main valve packing 41, Is formed on the outer peripheral wall surface of the pilot valve packing 71 with at least three protrusions 74, 74, 74.

In the manufacturing method of the on-off valve 100 of the present invention, a fluid inlet 31 and an outlet 32 are formed, and a valve main body 30 provided with a main valve chamber 33 therebetween, and slidably accommodated in the main valve chamber 33. A main valve body 40, a plunger 60 for operating the main valve body 40, and a solenoid 80 for driving the plunger 60. The main valve portion 10 is provided on the lower surface side of the main valve body 40. An open / close valve composed of an annular main valve packing 41 as a valve member made of elastic rubber and a main valve seat 35 formed between the inlet 31 and the outlet 32 of the valve body 30. A manufacturing method comprising:
At least three or more protrusions 47, 47, 47... / 48, 48, 48... Are formed on the outer peripheral wall surface and / or the inner peripheral wall surface of the annular main valve packing 41. A main valve packing insertion recess formed on the lower surface of the main valve body 40 with an annular main valve packing 41 by at least three or more protrusions 47, 47, 47... 48, 48, 48. 49, the main valve body outer front end portion 51 is caulked and assembled.

  Further, in the manufacturing method of the on-off valve 100 of the present invention, the plate-like support member 52 of the main valve packing 41 is disposed on the inner peripheral wall surface of the annular main valve packing 41, and the main valve body inner end 53 is attached to the inner valve wall. It is characterized by being assembled together.

The manufacturing method of the pilot type on-off valve 100 of the present invention includes:
The main valve part 10 and the pilot valve part 20 are provided, a fluid inlet 31 and an outlet 32 are formed, and a valve body 30 having a main valve chamber 33 provided therebetween, and is slidable in the main valve chamber 33. The accommodated main valve body 40, a pilot valve body 70 connected to the plunger 60, a solenoid 80 that drives the plunger 60 connected to the pilot valve body 70, and a suction element 90 that sucks the plunger 60 The main valve portion 10 includes an annular main valve packing 41 as an elastic rubber valve member provided on the lower surface side of the main valve body 40, and the inlet 31 of the valve body 30. The pilot valve portion 20 is constituted by a main valve seat 35 formed between the outlet 32 and the pilot valve portion 20 as a disk-shaped pilot as an elastic rubber valve member provided on the lower surface side of the pilot valve body 70. Valve packing 71 To a process for the preparation of pilot-off valve constituted by the pilot valve seat 42 formed on the upper side of the main valve body 40,
At least three or more protrusions 47, 47, 47... / 48, 48, 48... Are formed on the outer peripheral wall surface and / or the inner peripheral wall surface of the annular main valve packing 41. A main valve packing 41 having an annular main valve packing 41 formed with at least three protrusions 47, 47, 47..., 48, 48, 48. Aligned and arranged in the packing insertion recess 49, assembled by caulking the main valve body outer tip 51,
At least three protrusions 74, 74, 74... Are formed on the outer peripheral wall surface of the disc-shaped pilot valve packing 71, and the at least three protrusions 74, 74, 74,. The disc-shaped pilot valve packing 71 formed with a center is aligned with the pilot valve packing insertion recess 72 formed on the lower surface of the pilot valve body 70, and the pilot valve body tip 73 is It is characterized by being assembled together.

  In an on-off valve equipped with an annular or disc-shaped elastic rubber valve member, depending on the component accuracy, when the valve body is caulked and fixed, the valve member is eccentric and cannot be properly fixed to the valve body. However, in the present invention, at least three or more protrusions 47, 47, 47... / 48, are provided on the outer peripheral wall surface and / or inner peripheral wall surface of the main valve packing 41 and the outer peripheral wall surface of the pilot valve packing 71. 48, 48... And 74, 74, 74... Are formed, so that the eccentricity during assembly can be suppressed and the accuracy of the parts can be relaxed. In particular, according to the configuration of the present invention, it is possible to provide an on-off valve provided with an annular or disk-shaped elastic rubber valve member having an automatic alignment assembly structure with respect to the valve body.

It is detail drawing of the main valve body of the on-off valve provided with the valve member made from a ring-shaped elastic rubber which has the automatic alignment assembly structure concerning the embodiment of the present invention, and (a) is A- of (b). It is A sectional drawing, (b) is a bottom view, (c) has also shown the state by which the convex part was compressed. It is detail drawing of the main valve body of the on-off valve provided with the annular elastic rubber valve member which has the self-alignment assembly | attachment structure which concerns on other embodiment of this invention, (a) is (b). It is AA sectional drawing, (b) is a bottom view, (c) has also shown the state by which the convex part was compressed. It is detail drawing of the pilot valve body of the on-off valve provided with the disk-shaped elastic rubber valve member which has the self-alignment assembly structure concerning the embodiment of the present invention, and (a) is A of (b) It is -A sectional drawing, (b) is a bottom view. It is sectional drawing which shows the whole structure of the pilot type electromagnetic on-off valve provided with the valve member made from the annular | circular shaped and disk shaped elastic rubber which has the self-alignment assembly | attachment structure which concerns on embodiment of this invention. It is detail drawing of the main valve body of the on-off valve provided with the conventional disk-shaped elastic rubber valve member, (a) is AA sectional view of (b), (b) is a bottom view. is there. It is detail drawing of the pilot valve body of the on-off valve provided with the valve member made from the conventional annular elastic rubber, (a) is AA sectional drawing of (b), (b) is a bottom view. .

First, as an embodiment of the present invention, an automatic centering assembly structure is provided for the main valve body, an annular elastic rubber valve member is provided, and the pilot valve body is also provided for automatic centering assembly. The overall configuration of a pilot-type electromagnetic on-off valve having a structure and having a disk-like elastic rubber valve member will be described with reference to FIG. 1 to 3 show details of an annular or disk-like elastic rubber valve member having an automatic alignment assembly structure. In the following description of the embodiment, the up / down / left / right / inside / outside directions are based on the directions shown in FIG. 4 and are not intended to be interpreted to narrow the technical scope of the present invention.
Further, the on-off valve of the present invention is not limited to a solenoid valve, and is not limited to a direct acting type or a pilot type. In the following embodiments, a pilot type electromagnetic on-off valve will be described as an example. However, the present invention is not limited to the pilot type electromagnetic on-off valve.

  In FIG. 4, a pilot-type electromagnetic on-off valve 100 shown as an embodiment of the present invention includes a main valve portion 10 and a pilot valve portion 20 in a valve body 30, and is used for a refrigeration cycle of an automotive air conditioner. This is a pilot-type electromagnetic on-off valve that can open and close the fluid flow between the fluid inlet 31 and the outlet 32 by opening and closing the main valve portion 10 and the pilot valve portion 20. The inlet 31 and the outlet 32 are formed in a valve body 30 as a valve body, and a main valve chamber 33 is provided between the inlet 31 and the outlet 32 of the valve body 30. A main valve body 40 is accommodated in the main valve chamber 33 so as to be slidable up and down. A main valve portion 10 is formed on one side (downward in the illustrated embodiment) of the main valve body 40 in a sliding direction, and a pilot valve portion 20 is formed on the other side (upper in the illustrated embodiment). Yes.

  A plunger 60 that slides the pilot valve body 70 is disposed in a pipe 61 that opens downward in the center of the upper part of the electromagnetic on-off valve 100. The pilot valve body 70 is connected to the plunger 60 and is configured to be slidable in the pipe 61 up and down together with the plunger 60. That is, the plunger 60 slides up and down in the pipe 61 by the operation of the solenoid 80. A suction element 90 is provided as means for driving the plunger 60 by the operation of the solenoid 80. When the solenoid 90 is energized to the solenoid 80 by an appropriate control means (not shown), the magnetic stainless steel attractor 90 is magnetized, and overcomes the force of the spring 62 to attract the plunger 60 downward. The pipe 61 that accommodates the plunger 60 opens downward, and is fixed to the suction element 90 by appropriate means such as caulking or welding. The suction element 90 is fixed to the valve body 30. Usually, the valve body 30 and the main valve body 40 are made of aluminum.

  The attractor 90 has a generally cylindrical shape with its top and bottom open, and is fixed to the electromagnetic on-off valve 100 by appropriate means. The cylindrical shape of the suction element 90 includes an upper small-diameter portion 91 and a lower large-diameter portion 92, and the lower open end of the pipe 61 is fixed to the small-diameter portion 91, and the large-diameter portion 92 is connected to the electromagnetic on-off valve 100. It is fixed against. A plunger 60 is accommodated in the pipe 61 fixed to the small diameter portion 91 so as to be slidable up and down. The main valve body 40 is accommodated in the large diameter portion 92 so as to be slidable up and down. The outside of the large-diameter portion 92 of the suction element 90 is appropriately sealed with the valve body 30 by an O-ring 93, and the outer periphery of the main valve body 40 that slides within the large-diameter portion 92 is appropriately the main valve body piston ring. It is sealed by 43 so that there is no leakage of the refrigerant.

  In the embodiment shown in FIG. 4 of the present invention, the cylindrical member having a monolithic structure is formed through the step using the small diameter portion 91 and the large diameter portion 92 of the suction element 90 as one member. Depending on the embodiment, although not illustrated, the small-diameter portion 91 and the large-diameter portion 92 may be configured as separate members, and both may be fixed by appropriate means. In short, it suffices that the attractor 90 can attract and drive the plunger 60 by energizing the solenoid 80. In the present invention, a member that drives the plunger 60 by suction and accommodates the main valve body 40 so as to be slidable in the vertical direction is referred to as a suction element. It does not matter whether the suction element 90 is composed of one member or a plurality of members.

  The main valve portion 10 includes a main valve packing 41 formed on the lower side of the main valve body 40 and a main valve seat 35 formed between the inlet 31 and the outlet 32 of the valve body 30. The pilot valve portion 20 includes a pilot valve packing 71 formed below the pilot valve body 70 and a pilot valve seat 42 formed on the upper side of the main valve body 40. A main valve body shaft hole 45 and a pressure equalizing hole 44 are formed in the main valve body 40. The pressure equalizing hole 44 allows the main valve chamber 33 and the pilot valve chamber 34 to communicate with each other. By forming the pressure equalizing hole 44, the main valve chamber 33 and the pilot valve chamber 34 are pressure-equalized, and the main valve body. The opening and closing operation of 40 is facilitated and smoothed. Further, when the main valve portion 10 is in the closed state, the refrigerant in the main valve chamber 33 is quickly discharged to the pilot valve chamber 34 even when a sudden pressure change from the compressor, for example, when the compressor is started, is caused. The part 10 does not open, or has an effect of making it difficult to open the valve.

  1 and 2, an annular elastic rubber valve member 41 having the self-aligning assembly structure of the present invention is inserted into a main valve packing insertion recess 49 formed on the lower side of the main valve body 40. And the state fixed by the caulking process of the main valve body outer front-end | tip part 51 is shown. 1 shows a state in which four protrusions 47, 47, 47, 47 are formed on the outer peripheral wall surface of the valve member 41, and FIG. 2 shows that the four protrusions 48, 48, 48, 48 are valve members. The state formed in the inner peripheral wall surface of 41 is shown.

In the specification of the present application, as a constituent of the present invention, “the outer peripheral wall surface and / or the inner peripheral wall surface of the annular main valve packing 41 has at least three protrusions 47, 47, 47... / 48, 48, 48... Have been formed ”, this means that the following is included.
(1) Protrusions 47, 47, 47... Are formed in at least three or more locations on the outer peripheral wall surface of the annular main valve packing 41. (2) On the inner peripheral wall surface of the annular main valve packing 41. Protrusions 48, 48, 48... Are formed in at least three locations (3) Protrusions 47, 47 in at least three locations on the outer peripheral wall surface and inner peripheral wall surface of the annular main valve packing 41. 47, 48, 48, 48 ... formed

  With such a configuration, in the case of FIG. 1, the protrusions 47, 47, 47, 47 on the outer peripheral wall surface are compressed (compressed portion 54) by the outer peripheral contact surface of the valve member 41. Alignment with respect to the packing insertion recess 49 is achieved. As a result, a uniform gap 55 is formed around the valve member 41. In the case of FIG. 2, the protrusions 48, 48, 48, 48 on the inner peripheral wall surface are compressed (compressed part 54) by the inner peripheral contact surface of the valve member 41, and the main valve packing insertion recess 49 of the valve member 41. Alignment with respect to is achieved. As a result, a uniform gap 55 is formed around the valve member 41.

The procedure for assembling each member in the case shown in FIG. 1 is as follows.
(1) The valve member 41 having four protrusions 47, 47, 47, 47 formed on the outer peripheral wall surface is inserted into the main valve packing insertion recess 49 of the main valve body 40.
(2) The four protrusions 47, 47, 47, 47 formed on the outer peripheral wall surface of the valve member 41 are compressed by the outer peripheral wall surface of the main valve packing insertion concave portion 49, and the valve member 41 is compressed in the main valve packing insertion concave portion 49. The main valve body 40 is aligned.
(3) The main valve body outer end 51 of the main valve packing insertion recess 49 is caulked to fix the valve member 41 to the main valve body 40 in an aligned state.
(4) The main valve body front end portion 53 is caulked and fixed in a state where the plate-like support member 52 is applied to the valve member 41 inserted into the main valve packing insertion recess 49.
Here, the procedure of (3) and the procedure of (4) may be performed in reverse.

Next, the procedure for assembling each member in the case shown in FIG. 2 is as follows.
(1) The valve member 41 having four protrusions 48, 48, 48, 48 formed on the inner peripheral wall surface is inserted into the main valve packing insertion recess 49 of the main valve body 40.
(2) The four protrusions 48, 48, 48, 48 formed on the inner peripheral wall surface of the valve member 41 are compressed by the inner peripheral wall surface of the main valve packing insertion concave portion 49, and the valve member 41 is compressed into the main valve packing insertion concave portion 49. The main valve body 40 is aligned in the inside.
(3) The main valve body outer end 51 of the main valve packing insertion recess 49 is caulked to fix the valve member 41 to the main valve body 40 in an aligned state.
(4) The main valve body front end portion 53 is caulked and fixed in a state where the plate-like support member 52 is applied to the valve member 41 inserted into the main valve packing insertion recess 49.
Here, the procedure of (3) and the procedure of (4) may be performed in reverse.

  In FIG. 3, a disc-shaped elastic rubber valve member 71 having the self-aligning assembly structure of the present invention is inserted into a pilot valve packing insertion recess 72 formed on the lower side of the pilot valve body 70. The state where the pilot valve body tip 73 is fixed by caulking is shown. As shown in FIG. 3, the four protrusions 74, 74, 74, 74 are formed on the outer peripheral wall surface of the valve member 71.

The procedure for assembling each member in the case shown in FIG. 3 is as follows.
(1) The pilot valve packing 71 in which four pilot valve body outer peripheral wall projections 74, 74, 74, 74 are formed on the outer peripheral wall surface is inserted into the pilot valve packing insertion recess 72 of the pilot valve body 70.
(2) The four protrusions 74, 74, 74, 74 formed on the outer peripheral wall surface of the pilot valve packing 71 are compressed by the outer peripheral wall surface of the pilot valve packing insertion recess 72, and the pilot valve packing 71 is compressed into the pilot valve packing insertion recess 72. The pilot valve body 70 is aligned inside.
(3) The pilot valve body tip 73 of the pilot valve packing insertion recess 72 is caulked to fix the pilot valve packing 71 to the pilot valve body 70 in an aligned state.

  Next, the operation of the electromagnetic on-off valve 100 will be described with reference to FIG. As shown in the figure, when the electromagnetic on-off valve 100 is in the open state, the compressor (not shown) is operated, and the outflow port is opened from the inflow port 31 through the main valve portion 10 opened in the main valve chamber 33. A high-temperature and high-pressure gas refrigerant (or liquid refrigerant) flows through 32. In this state, since the current to the solenoid 80 is not passed, the main valve body 40 has a difference between the extension force of the main valve body spring 46 and the internal pressure of the main valve chamber 33 and the internal pressure of the pilot valve chamber 34. The pressure is lifted upward in the main valve chamber 33 to open the main valve portion 10. No attracting force is generated in the attracting element 90, and the plunger 60 is lifted up to the upper end in the pipe 61 by the extension force of the spring 62, and the pilot valve unit 20 is opened. Thereby, fluid, such as a refrigerant | coolant, maintains the flow from the inflow port 31 to the outflow port 32 through sufficient flow path of the ensured main valve part 10. FIG. At this time, the pressure of the refrigerant in the inlet 31 and the pressure of the refrigerant in the outlet 32 are substantially the same pressure.

  When the solenoid 80 is energized from a control device (not shown), an electromagnetic attracting force is generated in the attractor 90, and the plunger 60 is pulled down against the extension force of the spring 62. Since the pilot valve body 70 is integrally fixed to the plunger 60 below, the pilot valve body 70 slides up and down in the pipe 61 in the same manner as the movement of the plunger 60. The plunger 60 is pulled down by the suction force of the suction element 90, and the pilot valve body 70 is also slid downward. As a result, the pilot valve packing 71 provided below the pilot valve body 70 comes into contact with the pilot valve seat 42 formed on the upper side of the main valve body 40, and the pilot valve portion 20 is closed. Further, when the plunger 60 is pushed down and slides to the lowest point, the main valve packing 41 formed on the lower side of the main valve body 40 comes into contact with the main valve seat 35 formed in the valve main body 30 and becomes main. The valve unit 10 is closed. Thereby, although there is no illustrated state, both the main valve portion 10 and the pilot valve portion 20 are closed, and the fluid such as the refrigerant is blocked from flowing from the inlet 31 to the outlet 32 by closing the flow path. The

  When energization of the solenoid 80 from the control device (not shown) is cut off, the electromagnetic attracting force of the attractor 90 by the solenoid 80 disappears, and the plunger 60 is pushed upward by the extension force of the spring 62. Moves upward, the pilot valve packing 71 is separated from the pilot valve seat 42 provided on the upper surface side of the main valve body 40, and the pilot valve portion 20 is opened.

  As a result, the pilot valve chamber 34 communicates with the outlet 32 toward the condenser (not shown) through the main valve body shaft hole 45 provided in the center of the main valve body 40, and the pilot valve chamber 34 The pressure of the transition from high pressure to low pressure.

  This is because the pressure in the main valve chamber 33 from the inlet 31 is high, and the pressure in the outlet 32 toward the condenser (not shown) is low, and is applied to the upper surface of the main valve body 40. The upward force applied to the lower surface of the main valve body 40 is increased with respect to the downward force, the main valve body 40 moves upward, and the main valve packing 41 fixed to the lower surface side of the main valve body 40 has the main valve seat 35. Away from the valve, the valve is opened.

100 ... Electromagnetic on-off valve (pilot type electromagnetic on-off valve)
DESCRIPTION OF SYMBOLS 10 ... Main valve part 20 ... Pilot valve part 30 ... Valve body 31 ... Inlet 32 ... Outlet 33 ... Main valve chamber 34 ... Pilot valve chamber 35 ... Main valve seat 40 ... Main valve body 41 ... Main valve packing 42 ... Pilot valve seat 43 ... Main valve body piston ring 44 ... Pressure equalizing hole 45 ... Main valve body shaft hole 46 ... Main valve body spring 47 ... Outer peripheral wall projection 48 ... Inner peripheral wall projection 49 ... Main valve packing insertion recess 51 ... Main valve body outer tip 52 ... Plate-shaped support member 53 ... Main valve body inner end 54 ... Compression part 55 ... Gap 60 ... Plunger 61 ... Pipe 62 ... Spring 70 ... Pilot valve body 71 ... Pilot valve packing 72 ... Pilot valve packing insertion recess 73 ... Pilot valve body tip Part 74 ... pilot valve outside wall projections 80 ... Solenoid 90 ... attractor 91 ... small-diameter portion 92 ... large-diameter portion 93 ... O-ring

Claims (6)

A valve body having a main valve chamber formed between the fluid inlet and the outlet, a main valve body slidably accommodated in the main valve chamber, and a plunger for operating the main valve body; An on-off valve provided with a solenoid for driving the plunger,
A main valve portion is formed between an annular main valve packing as an elastic rubber valve member provided on the lower surface side of the main valve body, and the inlet and the outlet of the valve body. Consists of a valve seat,
An on-off valve characterized in that at least three or more protrusions are formed on the outer peripheral wall surface and / or the inner peripheral wall surface of the annular main valve packing.   2. A plate-like support member for the main valve packing is provided on the inner peripheral side of the annular main valve packing, and the plate-like support member is also fixed by caulking to the main valve body. On-off valve. A pilot-type on-off valve having a main valve portion and a pilot valve portion,
The pilot type on-off valve is connected to a plunger having a fluid inlet and outlet and a valve body having a main valve chamber therebetween, a main valve body slidably accommodated in the main valve chamber, and a plunger. A pilot valve body, a solenoid that drives the plunger connected to the pilot valve body, and a suction element that sucks the plunger,
The main valve portion is formed between an annular main valve packing as an elastic rubber valve member provided on the lower side of the main valve body, and the inlet and the outlet of the valve body. Consists of a main valve seat,
The pilot valve portion is configured by a disc-shaped pilot valve packing as an elastic rubber valve member provided on the lower side of the pilot valve body, and a pilot valve seat formed on the upper side of the main valve body. And
At least three protrusions are formed on the outer peripheral wall surface and / or inner peripheral wall surface of the annular main valve packing, and at least three protrusions are formed on the outer peripheral wall surface of the disc-shaped pilot valve packing. A pilot-type on-off valve characterized by A valve body having a main valve chamber formed between the fluid inlet and the outlet, a main valve body slidably accommodated in the main valve chamber, and a plunger for operating the main valve body; A solenoid that drives the plunger, and the main valve portion is an annular main valve packing as an elastic rubber valve member provided on the lower surface side of the main valve body, and the inlet of the valve body And an on-off valve manufacturing method comprising a main valve seat formed between the outlet and the outlet,
At least three or more protrusions are formed on the outer peripheral wall surface and / or inner peripheral wall surface of the annular main valve packing, and the annular main valve packing is connected to the main valve by the at least three protrusions. A method for manufacturing an on-off valve, characterized in that the main valve packing insertion recess formed on the lower surface of the body is aligned and disposed, and the outer end of the main valve body is crimped and assembled.   5. The on-off valve manufacturing method according to claim 4, wherein a plate-like support member of the main valve packing is disposed on an inner peripheral wall surface of the annular main valve packing, and the tip end portion inside the main valve is crimped and assembled. . A main valve portion and a pilot valve portion, wherein a fluid inlet and outlet are formed, a valve main body provided with a main valve chamber therebetween, and a main valve body slidably accommodated in the main valve chamber; A pilot valve body connected to the plunger, a solenoid that drives the plunger connected to the pilot valve body, and a suction element that sucks the plunger. The pilot valve portion is composed of an annular main valve packing as an elastic rubber valve member provided on the lower surface side, and a main valve seat formed between the inlet and the outlet of the valve body. Is a pilot-type on-off valve constituted by a disc-shaped pilot valve packing as an elastic rubber valve member provided on the lower surface side of the pilot valve body, and a pilot valve seat formed on the upper side of the main valve body The manufacturing method of
At least three or more protrusions are formed on the outer peripheral wall surface and / or the inner peripheral wall surface of the annular main valve packing, and the annular main valve packing having the at least three protrusion portions is formed. Aligned and arranged in the main valve packing insertion recess formed on the lower side of the main valve body, assembled by caulking the main valve body outer tip,
At least three protrusions are formed on the outer peripheral wall surface of the disc-shaped pilot valve packing, and the disc-shaped pilot valve packing having the at least three protrusions is formed on the pilot valve body. A pilot-type on-off valve manufacturing method, wherein the pilot valve packing insertion recess formed on the lower surface is aligned and disposed, and the tip of the pilot valve body is crimped and assembled.

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