JP2015098909A - On-off valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-off valve in which the service lives of a pipeline, an on-off valve itself and other devices disposed in the pipeline are prolonged without making a main valve abruptly close/separate to/from a valve seat and without generating impact pressure, and noise such as impact sound is not generated.SOLUTION: On an inner peripheral wall 52b of a valve body 52, a diameter-extended flow passage groove 76 is formed between the outer peripheral wall of a main valve 12 and the inner peripheral wall 52b of the valve body 52, and a corner part 76a on the valve port side of the diameter-extended flow passage groove 76 is formed so as to be positioned in a valve opening direction with respect to a position of an end part 12b on the valve port side of the main valve 12 in valve opening. On the inner peripheral wall 52b of a valve body 52, a narrowed flow passage 78 is formed from valve opening to the middle of valve opening, on the valve port 72 side of the diameter-extended flow passage groove 76.

Description

  The present invention relates to an on-off valve that is used in, for example, a refrigerant circulation circuit of an air conditioner such as an air conditioner or a refrigerator, and controls the flow of fluid by the operation of a valve body.

  2. Description of the Related Art Conventionally, an on-off valve, for example, a pilot type electromagnetic valve provided with a pilot valve is configured as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2003-222261).

  17 is a longitudinal sectional view of a conventional pilot-type solenoid valve 100, FIG. 18 is a partially enlarged sectional view of FIG. 17, and FIGS. 19 to 21 are partially enlarged sectional views for explaining the operating state of the solenoid valve 100. is there.

  That is, as shown in FIG. 17, the conventional pilot-type electromagnetic valve 100 includes a control unit 104 including a main valve 102. The control unit 104 of the electromagnetic valve 100 includes an electromagnetic coil 108 through which the driving unit 106 is inserted.

  The electromagnetic coil 108 includes a bobbin 110 wound with a winding, and is molded with a mold resin 112 so as to surround the bobbin 110. Further, the electromagnetic coil 108 is mounted inside the magnetic frame 114 and is fixed to the driving unit 106 via the magnetic frame 114.

  That is, the drive unit 106 is inserted into the drive unit insertion hole 118 formed in the center of the bottom plate portion 116 of the magnetic frame 114 and the drive unit insertion hole 120 of the bobbin 110. Then, the fastening bolt 130 is screwed into the female screw 124 formed on the upper portion of the attractor 122 of the driving unit 106 through the bolt insertion hole 128 formed in the central portion of the upper plate portion 126 of the magnetic frame 114. Yes.

  Thereby, the electromagnetic coil 108 is inserted and fixed to the drive part 106, and the control part 104 of the electromagnetic valve 100 is comprised.

  The drive unit 106 includes a plunger case 132, and a plunger 134 that can move up and down in the plunger case 132. A coil spring 138 a that biases the plunger 134 downward, that is, in the direction of the valve seat 150, is interposed between the suction element 122 and the plunger 134.

  That is, the coil spring 138 a is interposed between the spring mounting hole 140 formed on the plunger 134 side of the plunger 134 and the suction element 122.

  Further, the electromagnetic valve 100 includes a valve body 142, the main valve 102 is accommodated in a valve chamber 146 formed in the valve body 142, and a valve seat 150 formed in the valve body 142 has a main valve It is comprised so that 102 may contact | connect.

  Further, as shown in the enlarged view of FIG. 18, a portion of the main valve 102 that contacts the valve seat 150 is formed with an inclined tapered surface 102a whose diameter decreases toward the tip.

  Further, a coil spring 138 b is interposed in a compressed state between the intermediate flange 102 c of the main valve 102 and a coil spring accommodating groove 142 a formed at the bottom of the valve main body 142, and the main valve 102 is formed in the valve main body 142. The valve seat 150 is urged away from the valve seat 150.

  The main valve 102 has a pilot passage 152 penetrating vertically at the center thereof, and a pilot valve seat 154 is provided above the pilot passage 152. A spherical pilot valve 156 is provided at the lower end of the plunger 134 so as to be in contact with and away from the pilot valve seat 154.

  That is, the pilot valve 156 is attached so as to protrude downward from the lower end 134a of the plunger 134 by caulking the lower end 134a of the plunger 134.

  On the other hand, the valve body 142 is formed with, for example, a primary side flow path 158 for allowing a fluid such as a refrigerant to flow in and a secondary side flow path 160 for discharging the fluid.

  The valve body 142 has a valve port 162 formed in the valve seat 150.

  Furthermore, an annular sub-flow path 164 is formed by a clearance between the main valve 102 and the inner wall of the valve chamber 146 formed in the upper part of the valve main body 142. Further, a pilot valve chamber 146 a that is a space is formed in the valve main body 142 on the plunger 134 side with respect to the main valve 102, and the pilot valve chamber 146 a and the primary side flow channel are connected via the sub flow channel 164. The 158 side is configured to communicate.

  In addition, the inner peripheral wall 142b of the valve body 142 has an enlarged flow channel groove 166 that communicates with the primary channel 158 between the outer peripheral wall 102d of the main valve 102, which is a valve body, and the inner peripheral wall 142b of the valve body 142. Is formed.

  Such a solenoid valve 100 is operated as shown in FIGS.

  That is, in a state where the energization to the electromagnetic coil 108 is interrupted, the plunger 134 moves in a direction away from the attractor 122 by the urging force of the coil spring 138a.

  As a result, as shown in FIG. 18, the pilot valve 156 formed at the lower end of the plunger 134 moves in a direction to contact the pilot valve seat 154 formed at the upper part of the pilot passage 152 of the main valve 102. The pilot passage 152 is closed.

  Further, when the plunger 134 moves in a direction away from the suction element 122, the main valve 102 comes into contact with the valve seat 150 formed in the valve main body 142, and the valve port 162 formed in the valve seat 150 is opened. Closed.

  In this state, the fluid in the primary side flow path 158 on the high pressure side flows into the pilot valve chamber 146a of the valve body 142 via the sub flow path 164 formed on the outer periphery of the main valve 102, and the pilot valve chamber 146a becomes a high pressure, and the main valve 102 is urged in the direction in which it abuts against the valve seat 150.

  On the other hand, by energizing the electromagnetic coil 108 of the electromagnetic valve 100, the plunger 134 moves in the direction of the attractor 122 against the urging force of the coil spring 138a as shown in FIG.

  Accordingly, as shown in FIG. 19, the pilot valve 156 formed at the lower end of the plunger 134 moves in a direction away from the pilot valve seat 154 formed at the upper part of the pilot passage 152 of the main valve 102. The pilot passage 152 is opened.

  As a result, as shown by an arrow E in FIG. 20, the high-pressure fluid in the pilot valve chamber 146a of the valve body 142 is discharged to the secondary-side flow path 160 on the low-pressure side via the pilot passage 152. . As a result, the pressure in the pilot valve chamber 146a is lowered, and the main valve 102 is separated from the valve seat 150 as shown in FIG. 21 due to the differential pressure with the fluid in the primary flow path 158 on the high pressure side. The valve port 162 is configured to open in a direction.

  At this time, not only the flow flowing directly from the primary flow path 158 into the valve port 162 from the primary flow path 158 on the high pressure side, as indicated by the arrow F in FIG. 20, but also the primary flow path 158 The flow toward the lower end of the main valve 102 also occurs through the enlarged diameter flow passage groove 166 communicating with the main valve 102, and these flows cause the main valve 102 to move away from the valve seat 150 as shown in FIG. Is configured to move.

  In addition, when the volume of the valve chamber 146 is enlarged by the enlarged diameter flow groove 166, the maximum flow rate when fully opened is increased. The coil spring 138b is formed of a spring having a relatively weak spring force that allows the main valve 102 to move away from the valve seat 150 even when there is no differential pressure.

JP 2003-222261 A

  However, in such a conventional pilot-type solenoid valve 100, the valve of the enlarged flow passage groove 166 communicating with the primary flow passage 158 formed in the inner peripheral wall 142b of the valve body 142 in the closed state of FIG. The corner 166a on the port side is positioned below the corner 102b on the valve port 162 side of the outer peripheral surface of the main valve 102.

  For this reason, when the valve closed state of FIG. 18 is reached and the valve open state of FIG. 21 is reached, as shown by the arrow F in FIG. A flow to the lower end of the main valve 102 is generated via the radial flow channel groove 166.

  For this reason, as indicated by the alternate long and short dash line in the graph showing the flow characteristics in FIG. 11, the action of this rapid flow causes the main valve 102 to suddenly move away from the valve seat 150, and the impact pressure is reduced. As a result, the life of the piping, the solenoid valve itself, which is an on-off valve, and other devices arranged in the piping is shortened, and abnormal noise such as impact noise and noise are generated.

  In addition, as shown by the arrow F in FIG. 20, a flow with a very large flow rate is generated from the primary side flow path 158 on the high pressure side to the lower end of the main valve 102 via the enlarged diameter flow path groove 166. Therefore, the flow of the high-pressure fluid in the pilot valve chamber 146a of the valve body 142 through the pilot passage 152 to the secondary-side flow path 160 on the low-pressure side is obstructed, and the operation of the pilot valve 156 is performed. The operation of the solenoid valve 100 itself is also defective.

  On the other hand, when the valve opened state of FIG. 21 is reached and the valve closed state of FIG. 18 is reached, as indicated by the arrow F in FIG. 20, the primary side flow path 158 on the high pressure side passes through the enlarged diameter flow path groove 166. Since the flow toward the lower end of the main valve 102 is generated, the main valve 102 is suddenly drawn in the direction of the valve seat 150, and an impact pressure is generated. The life of other devices disposed in the piping is shortened, and abnormal noise such as impact noise and noise are generated.

  In view of such a current situation, the present invention has a rapid flow from the primary side flow path on the high pressure side to the lower end of the valve body through the enlarged diameter flow path groove from the valve closed state to the valve open state. This abrupt flow prevents the valve element from abruptly separating from the valve seat, does not generate an impact pressure, and the piping, the on-off valve itself, and other pipes An object of the present invention is to provide an on-off valve that extends the life of the apparatus and does not generate abnormal noise such as impact noise or noise.

  Further, according to the present invention, when going from the valve open state to the valve closed state, the flow from the primary side flow path on the high pressure side to the lower end of the valve body through the enlarged diameter flow path groove does not occur abruptly. Due to the abrupt flow, the valve body is not suddenly pulled in the direction of the valve seat, the valve body does not abruptly contact the valve seat, impact pressure is not generated, piping, the on-off valve itself, and Another object of the present invention is to provide an on-off valve in which the life of other devices arranged in the piping is extended and no abnormal noise such as impact noise or noise is generated.

  Further, the present invention provides a configuration in which the main valve is connected from the primary side flow path on the high pressure side through the enlarged diameter flow path groove when the valve is closed from the valve closed state to the valve open state. The flow to the lower end does not occur abruptly, and this rapid flow prevents the main valve from abruptly contacting and leaving the valve seat, no impact pressure is generated, piping, the on-off valve itself, and To provide a pilot-type on-off valve in which the life of other devices arranged in the piping is prolonged, abnormal noise such as impact noise and noise are not generated, and there is no malfunction of the pilot valve. Objective.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above.
An on-off valve configured to open a valve port provided in the valve seat by moving in a direction away from the valve seat formed in the valve body;
In the inner peripheral wall of the valve body, an enlarged flow passage groove is formed between the outer peripheral wall of the valve body and the inner peripheral wall of the valve body,
The corner portion on the valve port side of the enlarged flow channel is formed so as to be positioned in the valve opening direction rather than the position of the end portion on the valve port side of the valve body when the valve is closed,
In the inner peripheral wall of the valve body, a throttle channel is formed on the valve port side of the diameter-enlarged channel groove from when the valve is closed to when the valve is being opened.

  By configuring in this way, an enlarged flow passage groove is formed on the inner peripheral wall of the valve body between the outer peripheral wall of the valve body and the inner peripheral wall of the valve main body, and the valve port side of the enlarged flow passage groove Since the corner portion of the valve body is formed so as to be positioned in the valve opening direction rather than the position of the valve port side end portion of the valve body when the valve is closed, the diameter expansion channel groove is formed in the inner peripheral wall of the valve body. A throttle channel is formed on the valve port side from when the valve is closed to when the valve is being opened.

  As a result, the throttle flow path is formed from when the valve is closed to the middle of the valve opening, so that the flow becomes gentle via the throttle flow path, and when the valve is closed from the valve closed state to the valve open state, The flow from the primary side flow path to the lower end of the valve body through the enlarged diameter flow path groove does not occur abruptly and becomes a gentle flow.

  As a result, the gradual flow does not cause the valve body to move away from the valve seat abruptly. It is possible to provide an on-off valve in which the lifetime of other devices is extended and no abnormal noise such as impact noise or noise is generated.

  In addition, since the throttle flow path is formed from the half-open state of the valve to just before the valve is closed, the flow becomes gentle through the throttle flow path, and when the valve is opened from the valve open state to the valve closed state, The flow from the primary side flow path to the lower end of the valve body through the enlarged diameter flow path groove does not occur abruptly and becomes a gentle flow.

  As a result, the valve body is not pulled suddenly in the direction of the valve seat, and the valve body does not abruptly contact the valve seat, so no impact pressure is generated, and the piping, the on-off valve itself, and the piping It is possible to provide an on-off valve in which the life of the other devices arranged in is increased and no abnormal noise such as impact noise or noise is generated.

  The on-off valve of the present invention has a throttle wall surface on the inner peripheral wall of the valve body so that a throttle channel is formed on the valve port side of the enlarged-diameter channel groove from when the valve is closed to when the valve is in the middle of opening. It is formed.

  In this way, the throttle wall surface is formed on the inner peripheral wall of the valve body so that the throttle channel is formed on the valve port side of the enlarged flow channel groove from the time of closing the valve to the middle of the valve opening. The flow is gently guided through the valve, and when the valve is closed from the valve closed state to the valve open state, the primary side flow path on the high pressure side reaches the lower end of the valve body via the enlarged diameter flow path groove. The flow does not suddenly occur and becomes a gentle flow.

  The on-off valve of the present invention is characterized in that the throttle wall surface is formed by a wall surface parallel to the outer peripheral wall of the valve body.

  By configuring in this way, the throttle wall surface is formed by a wall surface parallel to the outer peripheral wall of the valve body, so that a throttle channel having a constant channel cross-sectional area is formed from when the valve is closed to when the valve is being opened. Therefore, the flow is constant and gentle through the throttle channel.

  Accordingly, when the valve is closed from the valve closed state to the valve open state, when the valve open state is reached, the valve reaches the lower end of the valve body from the primary side flow path on the high pressure side through the enlarged diameter flow path groove. The flow does not occur abruptly, and the flow is constant and gentle through the throttle channel.

  For this reason, the gentle constant flow prevents the valve element from abruptly coming into contact with the valve seat, does not generate impact pressure, and the piping, the on-off valve itself, and other devices installed in the piping. The life of the battery will be longer, and no abnormal noise such as impact noise or noise will occur.

  The on-off valve of the present invention is characterized in that an inclined guide surface that is inclined toward the valve port side is formed in the enlarged diameter flow channel so as to reach the throttle wall surface.

  By configuring in this way, the diameter-increasing channel groove, the restriction from the primary-side channel on the high-pressure side by the inclined guide surface inclined toward the valve port formed in the diameter-enlarging channel groove so as to reach the throttle wall surface. The flow to the lower end of the valve element flows efficiently and gently through the flow path.

  The on-off valve of the present invention is characterized in that the throttle wall surface is formed on the entire circumference of the inner peripheral wall of the valve body.

  By configuring in this manner, the throttle wall surface is formed on the entire circumference of the inner peripheral wall of the valve body, so that the throttle channel is formed over the entire circumference of the inner peripheral wall of the valve body. Therefore, the flow to the lower end of the valve body becomes constant and gentle through the throttle channel over the entire circumference of the lower end of the valve body.

  For this reason, the gentle constant flow prevents the valve element from abruptly coming into contact with the valve seat, does not generate impact pressure, and the piping, the on-off valve itself, and other devices installed in the piping. The life of the battery will be longer, and no abnormal noise such as impact noise or noise will occur.

The on-off valve of the present invention is characterized in that the throttle wall surface is formed on a part of the inner peripheral wall of the valve body.
Thus, the throttle wall surface may be formed on a part of the inner peripheral wall of the valve body.

Moreover, the on-off valve of the present invention is characterized in that a plurality of the throttle wall surfaces are formed on the inner peripheral wall of the valve body at a predetermined interval.
In this way, a plurality of throttle wall surfaces may be formed on the inner peripheral wall of the valve body at a predetermined interval.

The on-off valve of the present invention is characterized in that the inclined guide surface is formed corresponding to the throttle wall surface.
Thus, the inclined guide surface may be formed corresponding to the diaphragm wall surface.

The on-off valve of the present invention is characterized in that a stepped portion having a reduced diameter is formed on the outer peripheral wall of the valve body.
By configuring in this way, the flow path cross-sectional area of the flow path constituted by the enlarged flow path groove and the outer peripheral wall of the valve body is increased by the stepped portion having a reduced diameter. The flow to reach efficiently, and the maximum flow rate when fully opened can be increased.

  The on-off valve of the present invention is a pilot-type on-off valve in which the valve body includes a main valve that opens and closes a valve port formed in the valve seat, and a pilot valve that opens and closes a pilot passage communicating with the flow path. It is characterized by being.

  By configuring in this way, the flow from the primary side flow path on the high pressure side to the lower end of the main valve via the enlarged diameter flow path groove becomes a gentle and constant flow. It is possible to provide a pilot-type on-off valve in which a flow of high-pressure fluid through a pilot passage is not obstructed and is not obstructed and does not cause malfunction of the pilot valve. it can.

The on-off valve of the present invention is
A coil spring is interposed in a compressed state between the main valve and the valve body, and the main valve is biased in a direction away from a valve seat provided in the valve body,
The coil spring is disposed at a position above the enlarged-diameter channel groove.

  By configuring in this way, the coil spring is disposed at a position above the enlarged flow passage groove, so that the valve is passed from the primary flow passage on the high pressure side through the enlarged flow passage groove and the throttle passage. The flow to the lower end of the main valve, which is the body, is not hindered and flows efficiently.

The on-off valve of the present invention is
A plunger that moves when the on-off valve is energized by an electromagnetic coil;
An aspirator disposed opposite the plunger;
A valve body that moves in response to the movement of the plunger,
By energizing the electromagnetic coil, the plunger moves to the attractor side, the valve body moves in a direction away from the valve seat formed on the valve body, and the valve port formed on the valve seat The electromagnetic valve is configured to be opened.

  According to the present invention, the inner peripheral wall of the valve body has an enlarged flow passage groove formed between the outer peripheral wall of the valve body and the inner peripheral wall of the valve body on the inner peripheral wall of the valve body. Since the corner on the valve port side of the channel groove is formed so as to be positioned in the valve opening direction rather than the position of the valve port end of the valve body when the valve is closed, it is formed on the inner peripheral wall of the valve body. Has a throttle channel formed on the valve port side of the expanded channel groove from the time when the valve is closed until the valve is being opened.

  As a result, the throttle flow path is formed from when the valve is closed to the middle of the valve opening, so that the flow becomes gentle via the throttle flow path, and when the valve is closed from the valve closed state to the valve open state, The flow from the primary side flow path to the lower end of the valve body through the enlarged diameter flow path groove does not occur abruptly and becomes a gentle flow.

  As a result, the gradual flow does not cause the valve body to move away from the valve seat abruptly. It is possible to provide an on-off valve in which the lifetime of other devices is extended and no abnormal noise such as impact noise or noise is generated.

  In addition, since the throttle flow path is formed from the half-open state of the valve to just before the valve is closed, the flow becomes gentle through the throttle flow path, and when the valve is opened from the valve open state to the valve closed state, The flow from the primary side flow path to the lower end of the valve body through the enlarged diameter flow path groove does not occur abruptly and becomes a gentle flow.

  As a result, the valve body is not pulled suddenly in the direction of the valve seat, and the valve body does not abruptly contact the valve seat, so no impact pressure is generated, and the piping, the on-off valve itself, and the piping It is possible to provide an on-off valve in which the life of the other devices arranged in is increased and no abnormal noise such as impact noise or noise is generated.

FIG. 1 is a longitudinal sectional view of an on-off valve 10 of the present invention. FIG. 2 is a partially enlarged cross-sectional view of FIG. 3A is a partial cross-sectional perspective view of the valve main body 52 of the on-off valve 10 of the present invention, and FIG. 3B is a partial perspective view of the valve main body 52 of the on-off valve 10 of the present invention. FIG. 4 is a partially enlarged sectional view for explaining the operating state of the on-off valve 10 of the present invention. FIG. 5 is a partially enlarged cross-sectional view for explaining the flow state immediately after the on-off valve 10 of the present invention is opened. FIG. 6 is a partially enlarged cross-sectional view for explaining the flow state in the fully opened state of the on-off valve 10 of the present invention. FIG. 7 is a partially enlarged cross-sectional view illustrating a flow state immediately before the on-off valve 10 of the present invention is closed. 8A is a partial cross-sectional view of the throttle wall surface 80 of the on-off valve 10 of the present invention, and FIG. 8B is a partial cross-sectional view of the throttle wall surface 80 of the on-off valve 10 of the present invention. 9A is a partial cross-sectional perspective view showing another embodiment of the valve body 52 of the on-off valve 10 of the present invention, and FIG. 9B is another embodiment of the valve body 52 of the on-off valve 10 of the present invention. It is a fragmentary perspective view which shows an example. 10A is a partial cross-sectional perspective view showing another embodiment of the valve body 52 of the on-off valve 10 of the present invention, and FIG. 10B shows another embodiment of the valve body 52 of the on-off valve 10 of the present invention. It is a fragmentary perspective view which shows an example. FIG. 11 is a graph showing the flow characteristics of the on-off valve. FIG. 12 is a longitudinal sectional view of the on-off valve 200 in which the diameter-enlarging channel groove 76 and the throttle channel 78 are not formed. FIG. 13 is a longitudinal sectional view similar to FIG. 1 showing a valve closed state of another embodiment of the on-off valve 10 of the present invention. FIG. 14 is a longitudinal sectional view showing a valve open state of the on-off valve 10 of FIG. FIG. 15 is a longitudinal sectional view similar to FIG. 1 showing a valve closed state of another embodiment of the on-off valve 10 of the present invention. FIG. 16 is a longitudinal sectional view showing a valve open state of the on-off valve 10 of FIG. FIG. 17 is a longitudinal sectional view of a conventional pilot type solenoid valve 100. 18 is a partially enlarged cross-sectional view of FIG. FIG. 19 is a partial enlarged cross-sectional view for explaining the operating state of the electromagnetic valve 100. FIG. 20 is a partial enlarged cross-sectional view for explaining the operating state of the solenoid valve 100. FIG. 21 is a partial enlarged cross-sectional view for explaining the operating state of the solenoid valve 100.

  Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.

  1 is a longitudinal sectional view of an on-off valve 10 of the present invention, FIG. 2 is a partially enlarged sectional view of FIG. 1, and FIG. 3A is a partial sectional perspective view of a valve body 52 of the on-off valve 10 of the present invention. 3B is a partial perspective view of the valve main body 52 of the on-off valve 10 of the present invention, FIG. 4 is a partially enlarged sectional view for explaining the operating state of the on-off valve 10 of the present invention, and FIG. FIG. 6 is a partially enlarged cross-sectional view for explaining the flow state in the fully opened state of the on-off valve 10 according to the present invention, and FIG. 3 is a partially enlarged cross-sectional view illustrating a flow state immediately before the on-off valve 10 is closed. FIG.

  In FIG. 1, the code | symbol 10 has shown the on-off valve 10 of this invention as a whole.

  FIG. 1 shows an embodiment in which the on-off valve 10 of the present invention is applied to a pilot-type electromagnetic valve having a pilot valve.

  As shown in FIG. 1, the on-off valve 10 of the present invention includes a control unit 14 including a main valve 12. In addition, the control unit 14 of the on-off valve 10 includes an electromagnetic coil 18 through which the drive unit 16 is inserted.

  The electromagnetic coil 18 includes a bobbin 20 around which a winding is wound, and is molded with a mold resin 22 so as to surround the bobbin 20. Further, the electromagnetic coil 18 is mounted inside the magnetic frame 24 and is fixed to the drive unit 16 via the magnetic frame 24.

  That is, the drive unit 16 is inserted into the drive unit insertion hole 28 formed in the center portion of the bottom plate portion 26 of the magnetic frame 24 and the drive unit insertion hole 30 of the bobbin 20. Then, the fastening bolt 40 is screwed to the female screw 34 formed on the upper portion of the attractor 32 of the driving unit 16 through the bolt insertion hole 38 formed in the center portion of the upper plate portion 36 of the magnetic frame 24. Yes.

  Thereby, the electromagnetic coil 18 is inserted and fixed in the drive part 16, and the control part 14 of the on-off valve 10 is comprised.

  The drive unit 16 includes a plunger case 42, and a plunger 44 that can move up and down in the plunger case 42. A coil spring 48 a that biases the plunger 44 downward, that is, in the direction of the valve seat 60, is interposed between the suction element 32 and the plunger 44.

  That is, the coil spring 48 a is interposed between the spring mounting hole 50 formed on the plunger 44 side of the plunger 44 and the suction element 32.

  Further, the on-off valve 10 includes a valve main body 52, the main valve 12 is accommodated in a valve chamber 56 formed in the valve main body 52, and a main valve is mounted on a valve seat 60 formed in the valve main body 52. It is comprised so that 12 may contact / separate.

  Further, as shown in the enlarged view of FIG. 2, a seal groove 12a is formed in a portion of the main valve 12 that contacts the valve seat 60, and an annular seal member 46 is formed in the seal groove 12a. Together with the shaped fastener 54, the lower end 12b of the main valve 12 is fixed by caulking.

Further, a coil spring 48b is interposed in a compressed state between a flange 12c at the upper end of the main valve 12 and an inner peripheral flange 52a protruding from the inner peripheral side of the central portion of the valve main body 52. The valve body 52 is urged away from the valve seat 60 formed in the valve body 52.
That is, as shown in FIG. 2, the coil spring 48 b is disposed at a position above a diameter-enlarged flow channel groove 76 described later.

  By configuring in this way, the coil spring 48b is disposed at a position above the enlarged-diameter channel groove 76, so that the enlarged-diameter channel groove 76 and the throttle channel 78 from the primary-side channel 68 on the high-pressure side. Therefore, the flow to the lower end of the main valve 12 that is the valve body is not hindered and flows efficiently.

  Further, as shown in the enlarged view of FIG. 2, the main valve 12 is formed with a pilot passage 62 penetrating vertically in the central portion thereof, and a pilot valve seat 64 is provided above the pilot passage 62. Yes. The lower end of the plunger 44 is provided with a spherical pilot valve 66 that is separated from and in contact with the pilot valve seat 64. The pilot valve 66 is a pilot valve chamber that is a space on the plunger 44 side of the main valve 12. 56a.

  That is, the pilot valve 66 is biased downward through a coil spring 48c interposed in a compressed state in a pilot valve mounting member 58 fixed at the lower end of the plunger 44, and protrudes downward from the pilot valve mounting member 58. It is attached in the state to do. The pilot valve mounting member 58 is formed with a communication passage 58a that communicates with the pilot valve chamber 56a.

  On the other hand, as shown in FIGS. 1 and 2, the valve body 52 is formed with, for example, a primary side flow path 68 through which a fluid such as a refrigerant flows and a secondary side flow path 70 through which the fluid is discharged. ing.

  In the valve body 52, a valve port 72 is formed in the valve seat 60.

  Further, an annular sub-channel 74 is formed by a clearance between the main valve 12 and the inner wall of the valve chamber 56 formed in the upper part of the valve body 52, and the pilot valve chamber 56 a of the valve body 52 is connected to the primary side. The flow path 68 side is configured to communicate.

  Further, the inner peripheral wall 52b of the valve main body 52 has an enlarged flow passage groove 76 communicating with the primary flow passage 68 between the outer peripheral wall 12d of the main valve 12 that is a valve body and the inner peripheral wall 52b of the valve main body 52. Is formed.

  Further, as shown in FIGS. 2, 3A, and 3B, the inner peripheral wall 52b of the valve main body 52 is provided on the valve port 72 side of the enlarged flow channel groove 76 in FIGS. As will be described with reference to FIGS. 4 to 7, the throttle wall surface 80 is formed so that the throttle channel 78 is formed from when the valve is closed to when the valve is being opened.

That is, as shown in the enlarged view of FIG. 2, the corner portion 76a on the valve port 72 side of the enlarged flow channel groove 76 is on the valve port 72 side on the outer peripheral surface of the main valve 12 that is the valve body when the valve is closed. It forms so that it may be located in the valve opening direction rather than the position of an edge part (lower end 12b).
As a result, the inner peripheral wall 52b of the valve body 52 is throttled from the time when the valve is closed to the middle of the valve opening, as will be described later with reference to FIGS. A flow path 78 is formed.

  In addition, a throttle wall surface 80 is formed on the inner peripheral wall 52b of the valve body 52 so that a throttle channel 78 is formed on the valve port 72 side of the enlarged diameter channel groove 76 from when the valve is closed to when the valve is being opened. Yes.

  Thus, the throttle wall surface 80 is formed on the inner peripheral wall 52b of the valve body 52 so that the throttle channel 78 is formed on the valve port 72 side of the enlarged diameter channel groove 76 from when the valve is closed to when the valve is being opened. Therefore, the flow is gently guided through the throttle wall surface 80, and when going from the valve closed state to the valve open state, the primary side flow path on the high pressure side passes through the enlarged diameter flow path groove. The flow to the lower end of the valve body does not suddenly occur and becomes a gentle flow.

  In this embodiment, as shown in FIGS. 3A and 3B, the throttle wall surface 80 is the entire circumference of the inner peripheral wall 52b of the valve body 52 (that is, the portion other than the primary flow path 68). ).

  With this configuration, the throttle wall surface 80 is formed on the entire circumference of the inner peripheral wall 52b of the valve body 52, so that the throttle channel 78 is formed over the entire circumference of the inner peripheral wall 52b of the valve body 52. State. Therefore, as will be described later, the flow to the lower end of the main valve 12 that is the valve body is constant and gentle through the throttle passage 78 over the entire lower end of the main valve 12.

  For this reason, the gentle constant flow prevents the main valve 12 from abruptly coming into contact with or separating from the valve seat 60, no impact pressure is generated, and the piping, the on-off valve itself, and the other installed in the piping. As a result, the service life of the device becomes longer and no abnormal noise such as impact noise or noise is generated.

  Further, as shown in FIG. 2, in this embodiment, the throttle wall surface 80 is formed of a wall surface parallel to the outer peripheral wall 12d of the main valve 12 which is a valve body. However, the throttle wall surface 80 may be appropriately changed according to the shape of the outer peripheral wall 12d of the main valve 12 that is a valve body. For example, as shown in FIG. It may be configured to incline toward the 72 side, and as shown in FIG. 8B, when the outer peripheral wall 12d of the main valve 12 and the throttle wall surface 80 are inclined toward the valve port side, the throttle wall surface. 80 may be formed of a wall surface parallel to the outer peripheral wall 12d of the main valve 12, and can be appropriately changed.

  Further, as shown in the enlarged view of FIG. 2, an inclined guide surface 82 that is inclined toward the valve port 72 side is formed on the side wall below the enlarged flow channel groove 76 so as to reach the throttle wall surface 80. With this configuration, the inclined guide surface 82 that is inclined toward the valve port 72 formed in the enlarged diameter channel groove 76 so as to reach the throttle wall surface 80 is expanded from the primary side channel 68 that is the high pressure side. The flow to the lower end of the main valve 12 that is the valve body flows efficiently and slowly through the radial flow groove 76 and the throttle flow path 78.

  In this case, the inclined guide surface 82 is in a state where the extended line L on the valve port 72 side of the inclined guide surface 82 is in the valve open (fully open) state, as shown by the dotted line in the enlarged view of the valve open state in FIG. It is desirable that the lower end 12b of the main valve 12 as a valve body (that is, the portion that protrudes most downward in the vertical direction on the valve port 72 side of the main valve 12) passes below (the valve port 72 side). .

With this configuration, the extension line L on the valve port 72 side of the inclined guide surface 82 passes below the lower end 12b of the main valve 12 (on the valve port 72 side), so that it is guided by the inclined guide surface 82. The fluid is not disturbed by the main valve.
Accordingly, the flow from the primary side flow path 68 on the high pressure side to the lower end of the main valve 12 via the enlarged diameter flow path groove 76 and the throttle flow path 78 flows more efficiently and gently, and the valve is opened. The hourly flow rate increases.

  Further, as shown by the dotted line in the enlarged view of the valve opened state in FIG. 6, the oblique guide surface 82 is such that the extension line L on the valve port 72 side of the inclined guide surface 82 passes through the range M of the valve port 72. It is desirable to form.

By configuring in this way, the extension line L on the valve port 72 side of the inclined guide surface 82 is formed so as to pass through the range M of the valve port 72, and therefore, from the primary flow path 68 that is the high pressure side. The flow to the lower end of the main valve 12 through the enlarged diameter flow groove 76 and the throttle flow path 78 is reliably guided in the direction of the valve port 72 by the inclined guide surface 82.
As a result, the flow to the lower end of the main valve 12 easily flows into the valve port 72, and the flow rate when the valve is opened increases.

  Further, in the on-off valve 10 of this embodiment, as shown in FIG. 6, the extension line L on the valve port 72 side of the inclined guide surface 82 is formed so as to intersect the outer peripheral wall 60 a of the valve seat 60. However, it is desirable that the extension line L on the valve port 72 side of the inclined guide surface 82 is formed so as not to intersect the outer peripheral wall 60a of the valve seat 60 as in the embodiment shown in FIG.

With this configuration, the extension line L on the valve port 72 side of the inclined guide surface 82 is formed so as not to intersect with the outer peripheral wall 60a of the valve seat 60. Therefore, the primary flow path 68 that is the high pressure side. The flow extending to the lower end of the main valve 12 through the enlarged diameter channel groove 76 and the throttle channel 78 is obstructed by the outer peripheral wall 60a of the valve seat 60 when being guided by the inclined guide surface 82. Absent.
As a result, the flow to the lower end of the main valve 12 easily flows directly into the valve port 72, and the flow rate when the valve is opened is further increased.

  In this case, the extension line L on the valve port 72 side of the oblique guide surface 82 is formed so as to reach not only the outer peripheral wall 60a of the valve seat 60 but also the valve port 72 directly without intersecting the valve seat 60. It is preferable.

  Further, as shown in the enlarged view of FIG. 2, a stepped portion 84 having a reduced diameter is formed on the outer peripheral wall 12d of the main valve 12 which is a valve body.

  By configuring in this way, the flow path cross-sectional area of the flow path constituted by the enlarged diameter flow groove 76 and the outer peripheral wall 12d of the main valve 12 is increased by the reduced diameter step portion 84. The flow to the lower end of the main valve 12 which is the body flows efficiently, and the maximum flow rate when fully opened can be increased.

  The on-off valve 10 of the present invention configured as described above is operated as shown in FIGS. 2 and 4 to 7.

  That is, in a state where the energization to the electromagnetic coil 18 is interrupted, the plunger 44 moves in a direction away from the attractor 32 by the urging force of the coil spring 48a.

  As a result, as shown in FIG. 2, the pilot valve 66 formed at the lower end of the plunger 44 moves in a direction to contact the pilot valve seat 64 formed at the upper part of the pilot passage 62 of the main valve 12. The pilot passage 62 is closed.

  Further, when the plunger 44 moves away from the suction element 32, the main valve 12 comes into contact with the valve seat 60 formed on the valve main body 52, and the valve port 72 formed on the valve seat 60 is opened. Closed.

  In this state, the fluid in the primary side flow path 68 which is the high pressure side flows into the pilot valve chamber 56a of the valve body 52 via the sub flow path 74 formed on the outer periphery of the main valve 12, and the pilot valve chamber 56a becomes a high pressure, and the main valve 12 is urged in the direction in which it abuts against the valve seat 60.

  At this time, the fluid in the primary-side flow path 68 that is the high-pressure side flows into the space above the pilot valve 66 through the communication passage 58a formed in the pilot valve mounting member 58, and causes the pilot valve 66 to flow. The pilot passage 62 is biased downward by the differential pressure, and the state where the pilot passage 62 is closed is maintained by this biasing force and the biasing force of the coil spring 48c.

  On the other hand, when the electromagnetic coil 18 of the on-off valve 10 is energized, the plunger 44 moves in the direction of the attractor 32 against the urging force of the coil spring 48a as shown in FIG.

  As a result, as shown in FIG. 4, the pilot valve 66 formed at the lower end of the plunger 44 moves in a direction away from the pilot valve seat 64 formed at the upper portion of the pilot passage 62 of the main valve 12. The pilot passage 62 is opened.

  As a result, as indicated by an arrow A in FIG. 5, the high-pressure fluid in the pilot valve chamber 56 a of the valve body 52 is discharged through the pilot passage 62 to the secondary-side flow path 70 on the low-pressure side. As a result, the pressure in the pilot valve chamber 56a decreases, and the main valve 12 separates from the valve seat 60 as shown in FIG. 5 due to the differential pressure with the fluid in the primary flow path 68 on the high pressure side. Moving in the direction, the valve port 72 is configured to be opened. The coil spring 48b is a spring having a relatively weak spring force that allows the main valve 12 to move in a direction away from the valve seat 60 even when there is no differential pressure.

  At this time, the primary side flow path 68 on the high pressure side is moved to the lower end of the main valve 12 through the enlarged diameter flow path groove 76 communicating with the primary side flow path 68 as shown by an arrow B in FIG. The flow of

  Further, as described above, the inclined guide surface 82 that is inclined toward the valve port 72 side is formed on the side wall below the enlarged-diameter channel groove 76 so as to reach the throttle wall surface 80. With this configuration, the inclined guide surface 82 that is inclined toward the valve port 72 formed in the enlarged diameter channel groove 76 so as to reach the throttle wall surface 80 is expanded from the primary side channel 68 that is the high pressure side. The flow to the lower end of the main valve 12 that is the valve body flows efficiently and slowly through the radial flow groove 76 and the throttle flow path 78.

  Further, as shown by an arrow C in FIG. 5, immediately after the opening / closing valve 10 of the present invention is opened, the valve element is connected via the enlarged flow channel groove 76 and the throttle channel 78 communicating with the primary channel 68. The flow to the lower end of the main valve 12 is generated and becomes gentle. As a result, when the valve is closed to the valve open state, a flow from the primary side flow path 68 on the high pressure side to the lower end of the main valve 12 via the enlarged diameter flow path groove 76 is abruptly generated. There is no flow.

  Furthermore, since the flow toward the lower end of the main valve 12 becomes a gentle and constant flow through the throttle flow path 78, the high-pressure fluid in the pilot valve chamber 56a of the valve body 52 passes through the pilot passage 62, It is possible to provide the pilot type on-off valve 10 in which the flow A discharged to the secondary flow path 70 which is the low pressure side is not obstructed and the main valve 12 does not malfunction.

  As a result, the main valve 12 does not abruptly separate from the valve seat 60 due to this gentle flow, and the impact pressure is not generated, and the piping, the on-off valve 10 itself, and the piping are not separated. It is possible to provide the on-off valve 10 in which the life of other devices provided is extended and no abnormal noise such as impact noise or noise is generated. FIG. 6 shows the flow in the valve open state. In this state, the throttle channel 78 does not exist, the channel cross-sectional area increases by the diameter-enlarging channel groove 76, and the maximum flow rate is reached when fully opened. Can do a lot.

  Further, as indicated by an arrow D in FIG. 7, the throttle channel 78 is formed from the half-open state to the point just before the valve is closed immediately before the on-off valve 10 of the present invention is closed. When the flow becomes gentle via the flow path 78 and the valve is opened from the valve open state, the main valve, which is the valve body, from the primary flow path 68 on the high pressure side via the enlarged diameter flow groove 76. The flow to the lower end of 12 does not occur abruptly and becomes a gentle flow.

  As a result, the main valve 12 is not suddenly pulled in the direction of the valve seat 60, and the main valve 12 does not abruptly contact the valve seat 60. Therefore, no impact pressure is generated, and the piping and the on-off valve 10 It is possible to provide the on-off valve 10 in which the life of other devices arranged in itself and in the piping is extended, and no abnormal noise such as impact noise and noise are generated.

  As shown by the solid line of the graph showing the flow characteristics in FIG. 11, in the on-off valve 10 of the present invention, as shown by the one-dot chain line of the graph showing the flow characteristics in FIG. Compared to the case, the valve characteristics are not suddenly opened and closed, and the flow rate characteristic includes a region where the flow rate increase rate is small.

  Further, the solenoid valve 200 (see FIG. 12) in which the diameter-expanding channel groove 76 and the throttle channel 78 are not formed as shown by the broken line in the graph showing the flow rate characteristic in FIG. 10 is indicated by a reference numeral added with 200), and the on-off valve 10 having the enlarged flow channel groove 76 formed as in the on-off valve 10 of the present invention will be described below. In addition, the maximum flow rate when fully opened is increased.

  That is, as indicated by the solid line in the graph showing the flow rate characteristics of FIG. 11, in the on-off valve 10 of the present invention, the portion (1) shows a state where the plunger 44 is fully opened. The part (2) shows a state in which the main valve 12 is not raised because a sufficient differential pressure is not applied.

  The portion (3) shows a state in which the main valve 12 is rising after a sufficient differential pressure is applied, and the throttle effect by the throttle channel 78 is effective. It can be seen that the rate of increase in the flow rate is smaller than that of the solenoid valve 100 (one-dot chain line).

  Further, the portion (4) shows a state in which the main valve 12 is further raised from the state (3), and the lower end of the main valve 12 has passed through the enlarged-diameter channel groove 76. The throttle effect by 78 is lost, and the flow rate is increasing rapidly. The part (5) shows a state in which the main valve 12 is completely separated from the valve seat 60 and the valve port 72 is fully opened.

  In this embodiment, as shown in FIGS. 3A and 3B, the throttle wall surface 80 is formed on the entire circumference of the inner peripheral wall 52b of the valve body 52, but FIG. 9 (B), the throttle wall surface 80 may be formed on a part of the inner peripheral wall 52b of the valve main body 52, and in FIGS. 10 (A) and 10 (B). As shown, a plurality of throttle wall surfaces 80 may be formed on the inner peripheral wall 52b of the valve body 52 at a predetermined interval.

  In this case, as shown in FIGS. 9A to 10B, the inclined guide surface 82 is formed corresponding to the diaphragm wall surface 80. Although not shown, the inclined guide surface 82 It may not be formed corresponding to the wall surface 80.

  FIG. 13 is a longitudinal sectional view similar to FIG. 1 showing the valve closed state of another embodiment of the on-off valve 10 of the present invention, and FIG. 14 is a longitudinal sectional view showing the valve opened state of the on-off valve 10 of FIG. is there.

  The on-off valve 10 of this embodiment has basically the same configuration as the on-off valve 10 shown in FIG. 1, and the same reference numerals are given to the same constituent members, and detailed description thereof is omitted. To do.

  For convenience of explanation, members such as the electromagnetic coil 18 and the magnetic frame 24 are omitted in FIGS. 13 and 14.

  In the first embodiment, the on-off valve 10 of the present invention is applied to a pilot-type electromagnetic valve having a pilot valve 66. However, as shown in FIGS. The valve 10 shows an embodiment applied to a so-called direct acting solenoid valve.

  That is, an electromagnetic valve of a type in which the valve port 72 is directly opened and closed by the valve body 88 provided at the lower end of the plunger 44 without providing members such as the pilot valve 66, the main valve 12, the pilot passage 62, and the pilot valve seat 64. It is.

  Also in the on-off valve 10 of this embodiment, similarly to the on-off valve 10 of the first embodiment, the throttling effect by the throttling flow path 78 is obtained, no impact pressure is generated, and the pipe, the on-off valve 10 itself, and the pipe It is possible to provide the on-off valve 10 in which the life of other devices provided is extended and no abnormal noise such as impact noise or noise is generated.

  In this case, as in the embodiment shown in FIG. 6, the inclined guide surface 82 has an extension line L on the valve port 72 side of the inclined guide surface 82 as shown by the dotted line in the valve opened state of FIG. When the valve is open (fully open), the lower end 44b of the caulking portion of the plunger 44 provided with the valve body 88 at the lower end (that is, the plunger 44 and the valve body 88 of the valve port 72 side vertically downward). It is desirable to form it so as to pass below (the most protruding part) (on the valve port 72 side).

  Similarly to the embodiment shown in FIG. 6, the oblique guide surface 82 has an extension line L on the valve port 72 side of the inclined guide surface 82, as shown by the dotted line in the valve opened state of FIG. 14. It is desirable to form the valve port 72 so as to pass through the range M.

  Furthermore, it is desirable to form the extended line L on the valve port 72 side of the inclined guide surface 82 so as not to intersect the outer peripheral wall 60a of the valve seat 60 as in the embodiment shown in FIG.

  Also in this case, the extension line L on the valve port 72 side of the oblique guide surface 82 is formed not only to the outer peripheral wall 60a of the valve seat 60 but also directly to the valve port 72 without intersecting the valve seat 60. It is suitable.

  15 is a longitudinal sectional view similar to FIG. 1 showing the valve closed state of another embodiment of the on-off valve 10 of the present invention, and FIG. 16 is a longitudinal sectional view showing the valve open state of the on-off valve 10 of FIG. is there.

  The on-off valve 10 of this embodiment has basically the same configuration as the on-off valve 10 shown in FIG. 1, and the same reference numerals are given to the same constituent members, and detailed description thereof is omitted. To do.

  In the first embodiment, the on-off valve 10 of the present invention is applied to a pilot-type electromagnetic valve in which the pilot valve 66 and the main valve 12 are arranged on the same axis, but the on-off valve 10 of this embodiment is shown. As shown in FIGS. 15 and 16, an embodiment is shown in which the pilot valve 66 and the main valve 12 are applied to a pilot-type electromagnetic valve arranged on an axis line orthogonal to each other.

  In the on-off valve 10 of this embodiment, the pilot valve 66 is directly fixed to the end of the plunger 44 on the pilot valve seat 64 side without providing the pilot valve mounting member 58.

  The valve main body 52 is formed with a main valve chamber 90 that accommodates the main valve 12 so as to be movable in the direction of the axis Y along an axis Y perpendicular to the axis X of the valve chamber 56 of the valve main body 52.

  The main valve chamber 90 and the valve chamber 56 are configured to communicate with each other via a communication passage 92 formed inside the valve body 52.

  The operation of the on-off valve 10 of this embodiment is different only in the configuration in which the pilot valve 66 and the main valve 12 are arranged on the axes orthogonal to each other. Since it is the same as that of the on-off valve 10, the description of the operation is omitted.

  Also in the on-off valve 10 of this embodiment, similarly to the on-off valve 10 of the first embodiment, the throttling effect by the throttling flow path 78 is obtained, no impact pressure is generated, and the pipe, the on-off valve 10 itself, and the pipe It is possible to provide the on-off valve 10 in which the life of other devices provided is extended and no abnormal noise such as impact noise or noise is generated.

  In this case, as shown in FIG. 16, it is desirable to form an extension line L on the valve port 72 side of the inclined guide surface 82 so as not to intersect the outer peripheral wall 60 a of the valve seat 60.

With this configuration, the extension line L on the valve port 72 side of the inclined guide surface 82 is formed so as not to intersect with the outer peripheral wall 60a of the valve seat 60. Therefore, the primary flow path 68 that is the high pressure side. The flow extending to the lower end of the main valve 12 through the enlarged diameter channel groove 76 and the throttle channel 78 is obstructed by the outer peripheral wall 60a of the valve seat 60 when being guided by the inclined guide surface 82. Absent.
Thereby, the flow to the lower end 12b of the main valve 12 is easy to flow directly into the valve port 72, and the flow rate when the valve is opened is further increased.

  Also in this case, the extension line L on the valve port 72 side of the oblique guide surface 82 is formed not only to the outer peripheral wall 60a of the valve seat 60 but also directly to the valve port 72 without intersecting the valve seat 60. It is suitable.

  Further, in this case, similarly to the embodiment shown in FIG. 6, the inclined guide surface 82 is a valve body when the extension line L on the valve port 72 side of the inclined guide surface 82 is in the valve open (fully open) state. The main valve 12 may be formed so as to pass below (the valve port 72 side) below the lower end 12b of the main valve 12 (that is, the portion that protrudes most downward in the vertical direction toward the valve port 72 of the main valve 12).

  Similarly to the embodiment shown in FIG. 6, the oblique guide surface 82 may be formed such that the extension line L on the valve port 72 side of the inclined guide surface 82 passes through the range M of the valve port 72. .

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to this. For example, in the above embodiment, the valve body is opened and closed by switching between energization and deenergization of the electromagnetic coil 18. The electromagnetic valve is described as an on-off valve that operates so as to operate and opens the valve port 72 by energizing the electromagnetic coil 18. However, instead of energizing the electromagnetic coil 18, for example, the valve body is operated by air pressure or the like. The present invention can also be applied to an on-off valve that moves up and down to open and close the valve body.
Furthermore, the on-off valve of the present invention can be applied to an on-off valve in which a throttle channel (groove) is formed in a valve closed state, in addition to a valve in which the flow rate is completely shut off when the valve is closed. Various modifications can be made without departing from the object of the invention.

  The present invention can be applied to, for example, an open / close valve for opening and closing a flow path used in a refrigerant circulation circuit of an air conditioner such as an air conditioner or a refrigerator.

10 On-off valve 12 Main valve 12a Seal groove 12b Lower end (end)
12c Flange 12d Outer peripheral wall 14 Control part 16 Drive part 18 Electromagnetic coil 20 Bobbin 22 Mold resin 24 Magnetic frame 26 Bottom plate part 28 Drive part insertion hole 30 Drive part insertion hole 32 Suction element 34 Female screw 36 Upper plate part 38 Bolt insertion hole 40 Fastening Bolt 42 Plunger case 44 Plunger 44b Lower end 46 Seal material 48a Coil spring 48b Coil spring 48c Coil spring 50 Spring mounting hole 52 Valve body 52a Inner peripheral flange 52b Inner peripheral wall 54 Fastener 56 Valve chamber 56a Pilot valve chamber 58 Pilot valve mounting member 58a Communication passage 60 Valve seat 60a Outer peripheral wall 62 Pilot passage 64 Pilot valve seat 66 Pilot valve 68 Primary side flow passage 70 Secondary side flow passage 72 Valve port 74 Sub flow passage 76 Expanded flow passage groove 76a Corner portion 78 Restriction flow passage 80 Diaphragm wall 82 Inclined guide surface 84 Step portion 86 Mounting portion 88 Valve body 90 Main valve chamber 92 Communication passage 100 Solenoid valve 102 Main valve 102a Tapered surface 102b Corner portion 102c Flange 102d Outer wall 104 Control portion 106 Drive portion 108 Electromagnetic coil 110 Bobbin 112 Mold resin 114 Magnetic frame 116 Bottom plate portion 118 Drive portion insertion hole 120 Drive portion insertion hole 122 Suction element 124 Female screw 126 Upper plate portion 128 Bolt insertion hole 130 Fastening bolt 132 Plunger case 134 Plunger 138a Coil spring 138b Coil spring 140 Spring mounting hole 142 Valve body 142a Coil spring housing Groove 142b Inner peripheral wall 146 Valve chamber 146a Pilot valve chamber 150 Valve seat 152 Pilot passage 154 Pilot valve seat 156 Pilot valve 158 Primary side passage 160 Secondary side passage 162 Valve port 164 Sub passage 166 Enlarged flow channel groove 166a Corner portion 200 Solenoid valve

Claims (12)

An on-off valve configured to open a valve port provided in the valve seat by moving in a direction away from the valve seat formed in the valve body;
In the inner peripheral wall of the valve body, an enlarged flow passage groove is formed between the outer peripheral wall of the valve body and the inner peripheral wall of the valve body,
The corner portion on the valve port side of the enlarged flow channel is formed so as to be positioned in the valve opening direction rather than the position of the end portion on the valve port side of the valve body when the valve is closed,
An on-off valve characterized in that a throttle channel is formed on the inner peripheral wall of the valve main body on the valve port side of the diameter-enlarged channel groove from when the valve is closed to when the valve is being opened.   A throttle wall surface is formed on the inner peripheral wall of the valve main body so that a throttle channel is formed on the valve port side of the enlarged-diameter channel groove from when the valve is closed to when the valve is being opened. Open / close valve.   The on-off valve according to claim 2, wherein the throttle wall surface is formed of a wall surface parallel to the outer peripheral wall of the valve body.   3. The on-off valve according to claim 1, wherein an inclined guide surface that is inclined toward the valve port side is formed in the enlarged-diameter channel groove so as to reach the throttle wall surface. 4.   The on-off valve according to any one of claims 2 to 3, wherein the throttle wall surface is formed on the entire circumference of the inner peripheral wall of the valve body.   The on-off valve according to any one of claims 2 to 4, wherein the throttle wall surface is formed on a part of an inner peripheral wall of the valve body.   The on-off valve according to any one of claims 2 to 4, wherein a plurality of the throttle wall surfaces are formed on the inner peripheral wall of the valve body at a predetermined interval.   The on-off valve according to any one of claims 4 to 7, wherein the inclined guide surface is formed corresponding to the throttle wall surface.   The on-off valve according to any one of claims 1 to 7, wherein a stepped portion having a reduced diameter is formed on an outer peripheral wall of the valve body.   The valve body is a pilot-type on-off valve including a main valve that opens and closes a valve port formed in the valve seat, and a pilot valve that opens and closes a pilot passage communicating with the flow path. The on-off valve according to any one of 1 to 9. A coil spring is interposed in a compressed state between the main valve and the valve body, and the main valve is biased in a direction away from a valve seat provided in the valve body,
The on-off valve according to claim 10, wherein the coil spring is disposed at a position above the diameter-enlarged flow path groove. A plunger that moves when the on-off valve is energized by an electromagnetic coil;
An aspirator disposed opposite the plunger;
A valve body that moves in response to the movement of the plunger,
By energizing the electromagnetic coil, the plunger moves to the attractor side, the valve body moves in a direction away from the valve seat formed on the valve body, and the valve port formed on the valve seat The on-off valve according to claim 1, wherein the on-off valve is an electromagnetic valve configured to be opened.

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