JP2020016290A - Pressure control valve - Google Patents

Abstract

To provide a pressure control valve which attains good assemblability while providing proper slide resistance to a valve body.SOLUTION: A pressure control valve 10 includes: a valve body 11 having a primary side port 11A, a second side port 11B, and a valve seat part 11C; a valving element 12; a bellows 13; a valve spring 14; and a blade member 17 being an elastic member which is fixed to one of the valve body 11 and the valving element 12 and contacts with a slide contact surface 215 of the other in a pressing state. The blade member 17 has: a fixing part 41 fixed to the valving element 12; and multiple elastic pieces 42 which extend from the fixing part 41 and slidably contact with the slide contact surface 215 and is provided at a passage of a fluid flowing from the primary side to the secondary side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pressure regulating valve.

  2. Description of the Related Art Conventionally, there has been proposed a pressure regulating valve that is used in a refrigeration cycle and variably controls an opening degree to regulate a pressure on a primary side (for example, see Patent Document 1). The pressure regulating valve described in Patent Literature 1 is provided between an evaporator and a compressor in a refrigeration cycle of an air conditioner for a vehicle, and keeps an evaporating pressure in an evaporator on a primary side at a predetermined value or more to evaporate. It is an evaporation pressure control valve for preventing frost (frost formation) in the vessel.

  The pressure regulating valve includes a body (valve body) having a refrigerant passage formed therein, a valve body for opening and closing the refrigerant passage, a bellows and a coil spring (valve spring) for applying a load to the valve body in a valve closing direction. A stem interlocked with the valve body in the bellows, a guide in which the stem slides inside, and a resistance applying member provided between the stem and the guide. As the resistance applying member, an O-ring, a spring member, a lubricating oil, or the like is used. By applying sliding resistance to the valve with the resistance applying member, vibration of the valve due to rapid pressure fluctuation of the refrigerant is suppressed. It is supposed to be.

JP 2015-152137 A

  However, in the conventional pressure regulating valve as described in Patent Literature 1, since not only the coil spring, the stem, and the guide but also the resistance applying member are provided in the closed space inside the bellows, these members are used. It is necessary to seal the end of the bellows by welding while being housed inside, and there is a problem that the workability of assembly is reduced. Patent Literature 1 discloses an example in which an O-ring is provided in a refrigerant flow path between a valve body and a valve body. In that case, however, refrigeration oil contained in the refrigerant does not sufficiently exist. Driving under the conditions may cause problems such as generation of abnormal noise due to catching of the O-ring and obstruction of movement of the valve element.

  It is an object of the present invention to provide a pressure regulating valve that can provide good assemblability while providing appropriate sliding resistance to a valve element.

  The pressure regulating valve of the present invention is a pressure regulating valve that variably controls an opening in accordance with a pressure acting on a valve body, and includes a primary port, a secondary port, and a valve body having a valve seat, A valve body seated or unseated from the secondary side with respect to the valve seat, a bellows having one end connected to the secondary side of the valve body and the other end connected to the valve body, and inside the bellows. A valve spring that is provided and biases the valve body toward the valve seat portion, and an elastic member fixed to one of the valve body and the valve body and in contact with the other slidable contact surface in a pressed state, The elastic member includes a fixed portion fixed to at least one of the valve body and the valve body, and a plurality of elastic pieces extending from the fixed portion and slidingly contacting the sliding contact surface. , Provided in a flow path of a fluid flowing from the primary side to the secondary side.

  According to the present invention, since the elastic member is provided in the flow path between the valve body and the valve body, it can be easily assembled as compared with the case where the elastic member is provided inside the bellows. Can be improved. Further, since the elastic member is formed having a fixed portion and a plurality of elastic pieces, and the plurality of elastic pieces slide on the surface to be slid, a sliding resistance of the valve body is obtained. Regardless, a stable sliding resistance can be imparted to the valve element.

  At this time, the fixing portion of the elastic member is fixed to the primary side of the valve body, and the plurality of elastic pieces extend from the fixing portion to the primary side, and at the inner peripheral surface of the primary side port. It is preferable that the sliding surface is in sliding contact with the sliding surface.

  The fixed portion of the elastic member is fixed to a secondary side of the valve body, the plurality of elastic pieces extend from the fixed portion to the primary side, and an inner peripheral surface of the secondary side port. The sliding contact surface may be configured to include:

  Further, the fixing portion of the elastic member is fixed inside the secondary port of the valve body, the plurality of elastic pieces extend from the fixing portion to the primary side, and the outer periphery of the valve body A configuration may be employed in which the sliding surface is in sliding contact with the sliding surface.

  According to the above configuration, the fixing portion of the elastic member is fixed to the valve body or the valve body, and the slidable contact surface is the inner peripheral surface of the primary port, the inner peripheral surface of the secondary port or the outer peripheral surface of the valve body. The plurality of elastic pieces of the elastic member slidably contact the sliding contact surface, so that the configurations of the elastic member and the sliding contact surface can be simplified.

  In addition, at least three or more of the elastic pieces are provided, and at an intermediate position in the extending direction of the elastic piece, a slide which refracts in a chevron toward the surface to be slid and slides on the surface to be slid. Preferably, a contact portion is provided.

  According to this configuration, the elastic piece has a sliding contact portion formed by being bent in a mountain shape, and the sliding contact portion slides on the surface to be slid, so that the sliding contact portion is substantially slid on the point contact. As a result, a stable frictional resistance can be obtained, and it is possible to prevent the valve body from being caught which hinders the movement of the valve body.

  At this time, the elastic piece includes a first elastic piece and a second elastic piece in which the sliding contact portion is provided at different positions along the axial direction of the valve body. A plurality of the second elastic pieces are provided alternately in the circumferential direction, respectively, and a plurality of the first elastic pieces are provided axially symmetrically, and a plurality of the second elastic pieces are provided axially symmetrical. Is preferred.

  According to this configuration, the sliding portions of the first elastic piece and the second elastic piece are provided at different positions along the axial direction, the plurality of first elastic pieces are provided axially symmetrically, and the plurality of first elastic pieces are provided. Since the two elastic pieces are provided axially symmetrically, it is possible to make a point contact with the surface to be slid substantially at two places in different axial directions and at a plurality of places in the circumferential direction. Therefore, the radial pressing force acting on the valve element from the elastic member is dispersed and equalized by the sliding contact portion coming into contact with the sliding contact surface, so that the valve element is prevented from tilting due to this pressing force. Thus, the valve body can be smoothly moved, and the seat and the seat can be reliably executed.

  In addition, an inclined portion that is inclined with respect to the axial direction of the valve body is provided between a base end portion of the elastic piece on the fixed portion side and the sliding contact portion, and the inclined portion is provided with the valve seat portion. It is preferable that the pressing force of the sliding contact portion against the sliding contact surface is increased by receiving pressure from a fluid passing through the gap with the valve body.

  According to this configuration, the inclined portion of the elastic piece receives the pressure from the fluid passing through the gap between the valve seat and the valve body, and increases the pressing force of the sliding contact portion against the sliding contact surface, thereby opening the valve. The pressing force acting on the valve body from the elastic member at the time increases, and the vibration of the valve body can be suppressed to improve the stability. On the other hand, when the valve is closed, since the fluid does not pass through the gap between the valve seat and the valve body, the pressing force is smaller than when the valve is opened, and when the valve body separates due to the pressure of the fluid on the primary side. Movement can be smooth.

  In addition, it is preferable that a second inclined portion that is inclined in a direction away from the slidable contact surface with respect to the axial direction of the valve body is provided on a tip side of the elastic piece relative to the sliding contact portion.

  According to this configuration, since the elastic piece is provided with the second inclined portion inclined in a direction away from the surface to be slid, the tip of the elastic piece is positioned around the surface to be slid when assembling the pressure regulating valve. It is hard to be caught, and the assemblability can be further improved.

  ADVANTAGE OF THE INVENTION According to the pressure regulating valve of this invention, while favorable elasticity can be ensured by providing an elastic member in the flow path between a valve main body and a valve body, the elastic piece of an elastic member is covered. Sliding resistance is applied to the valve element by sliding contact with the sliding contact surface, so that vibration of the valve element can be suppressed and movement can be stabilized.

It is a sectional view showing the pressure control valve concerning a 1st embodiment of the present invention. (A), (B) is an expanded sectional view which shows the principal part of the said pressure regulating valve. (A), (B) is sectional drawing and a bottom view which show the elastic member in the said pressure regulating valve. (A)-(C) are sectional drawing and bottom views which show the modification of the said elastic member. It is a lineblock diagram showing some refrigeration cycles provided with the above-mentioned pressure control valve. (A), (B) is an expanded sectional view which shows the principal part of the pressure regulating valve which concerns on 2nd Embodiment of this invention. (A), (B) is an expanded sectional view which shows the principal part of the pressure regulating valve which concerns on 3rd Embodiment of this invention.

  A pressure regulating valve according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view illustrating the pressure regulating valve 10 of the present embodiment, and is a diagram illustrating a valve closed state. 2 (A) and 2 (B) are enlarged sectional views showing a main part of the pressure regulating valve 10, FIG. 2 (A) shows a valve closed state, and FIG. 2 (B) shows a valve open state. It is. The pressure regulating valve 10 is used in a refrigeration cycle partially shown in FIG. This refrigeration cycle constitutes, for example, a vehicle-mounted air conditioner. The pressure control valve 10 is provided between the evaporator 100 on the primary side and the compressor 200 on the secondary side, and the refrigerant (fluid) vaporized by the evaporator 100 is introduced. The refrigerant is sent to the compressor 200 while maintaining the evaporation pressure of the refrigerant at or above a predetermined value.

  As shown in FIG. 1, the pressure regulating valve 10 includes a valve body 11 having a cylindrical shape around an axis L, a valve body 12 provided inside the valve body 11, and a bellows 13 connected to the valve body 12. A valve spring 14 provided inside the bellows 13, a guide portion 15 for guiding expansion and contraction of the bellows 13 and the valve spring 14, a connecting member 16 for connecting the bellows 13 to the valve body 11, and a valve body 12. A blade member 17 as an elastic member for providing sliding resistance, and a first flange 18 and a second flange 19 for bolting the pressure regulating valve 10 to a predetermined portion of the air conditioner are provided.

  The valve body 11 includes a first member 21 and a second member 22 each formed by cutting a metal material having a cylindrical shape as a whole, and a metal disk provided between the first member 21 and the second member 22. And a stopper member 24 for locking the second member 22 to the first member 21. The valve body 11 is located on the primary side (lower side in FIG. 1) and connected to the evaporator 100, and is connected to the compressor 200 on the secondary side (upper side in FIG. 1). A secondary port 11B, and a valve seat 11C provided at a position separating the primary port 11A and the secondary port 11B.

  The first member 21 includes a first cylindrical portion 211 located on the primary side (the lower side in FIG. 1 and the evaporator 100 side), a stepped valve seat portion 11C on which the valve body 12 can be seated, and a valve. A secondary chamber 212 located on the secondary side of the seat 11C, a holding section 213 having an inner diameter enlarged on the secondary side of the secondary chamber 212, and a second bolt for fixing a joint or the like on the evaporator 100 side. And one flange 18. The primary side port 11A is constituted by the internal space of the first cylindrical portion 211. The first flange 18 is formed integrally with the first member 21.

  The second member 22 includes a held part 221 held by the holding part 213 and communicated with the secondary chamber 212, a second cylindrical part 222 extending from the held part 221 to the secondary side, and a second cylindrical part 222. A male screw portion 223 provided on the outer peripheral surface of the distal end and screwed with the second flange 19 is formed. The secondary space 11B is constituted by the internal space of the secondary chamber 212, the held part 221 and the second cylindrical part 222. A pressing member 224 for pressing the support member 23 toward the first member 21 is provided at a lower end portion of the outer periphery of the held portion 221, and a seal between the holding portion 221 and the outer peripheral surface of the held portion 221 is provided. Thus, a seal member 225 is provided to hermetically separate the inside of the pressure regulating valve 10 from the outside (atmosphere). The pressing member 224 and the sealing member 225 are each configured by an O-ring made of rubber.

  The support member 23 is sandwiched between the upper end of the secondary chamber 212 of the first member 21 and the lower end of the held portion 221 of the second member 22 via the pressing member 224, and the second member 22 is And is fixed by being locked to the first member 21. The support member 23 is formed to have a screw hole 231 at the center where the bolt 161 of the connection member 16 is screwed, and a plurality of conduction holes 232 that penetrate the support member 23 around the screw hole 231. The plurality of conduction holes 232 allow the secondary chamber 212 of the first member 21 to communicate with the inside of the held portion 221 and the second cylindrical portion 222 of the second member 22 so that the refrigerant can pass therethrough.

  The valve body 12 is made of a disk-shaped metal member as a whole, and can be seated or unseated on the valve seat portion 11C from the secondary side. The valve body 12 includes a disk portion 31 having a larger diameter than the valve seat portion 11C, two locking claw portions 32 projecting upward (secondary side) from an outer peripheral portion of the disk portion 31, and a disk portion. At the time of closing the valve, two rising walls 33 erected in a semicircular shape on the upper surface of the upper portion 31 and a central portion of the disk portion 31 penetrate to communicate the primary port 11A and the secondary chamber 212. Also has a bleed hole 34 that is a communication passage that allows minute movement of the refrigerant, and a locking portion 35 that protrudes downward (primary side) around the bleed hole 34 and locks the blade member 17. Is formed. The valve body 12 is seated on the valve seat 11C by being urged downward by the urging force of the bellows 13 and the valve spring 14. On the other hand, when the evaporation pressure of the refrigerant from the evaporator 100 flowing into the primary port 11A increases, the valve body 12 is configured to separate from the valve seat 11C according to the evaporation pressure.

  As shown in FIG. 2, the bellows 13 are formed as a whole with a bottomed tubular shape and bellows shape by press molding from a metal thin plate material such as stainless steel, and a primary end of the formed bellows 131. It has a disk-shaped metal plate 132 welded and fixed to the surface of the portion by, for example, spot welding, and a flange member 133 welded and fixed to the secondary end of the molded bellows 131. The bellows 13 is hermetically sealed by joining the formed bellows 131 and the flange member 133, and the inside thereof is in a vacuum state or an extremely low pressure state. The metal plate 132 is inserted between the two locking claws 32 of the valve body 12 and comes into contact with the two rising wall parts 33, whereby the valve body 12 and the bellows 13 And are assembled.

  As shown in FIG. 2A, the effective diameter φb of the bellows 13 is substantially the same as the valve diameter φv of the valve seat 11C. That is, the effective area Ab of the bellows 13 and the effective area Av of the valve seat 11C are substantially the same, and an upward force (P2 × Ab) acting on the bellows 13 due to the secondary pressure P2 and acting on the valve body 12. The downward force (P2 × Av) cancels out. Therefore, the valve element 12 is not affected by the secondary pressure and the valve element 12 is opened and closed mainly by the primary pressure, so that the evaporation pressure can be controlled stably.

  The guide portion 15 is a connecting member that is brought into contact with a cylindrical cylinder member 151 provided on the primary side inside the bellows 13 and a flange member 133 on the secondary side inside the bellows 13 by the urging force of the valve spring 14. 152, and a piston member 153 fixed to the connecting member 152 and supported by the cylinder member 151 so as to be able to advance and retreat. The valve spring 14 is a compression spring, and is held between the cylinder member 151 and the connecting member 152 in a pressed state. Accordingly, the guide portion 15 receives the urging force by the valve spring 14, and the bellows 13 is urged in the extending direction along the axis L by transmitting the urging force.

  The connection member 16 has a bolt 161 fixed to the flange member 133 of the bellows 13 and a lock nut 162 screwed to the bolt 161. The bolt 161 is screwed into a screw hole 231 of the support member 23, and by rotating the bolt 161 to advance and retreat in a direction along the axis L, the bellows 13 and the valve spring 14 are expanded and contracted. The evaporating pressure controlled by the pressure adjusting valve 10 can be adjusted to a predetermined pressure by adjusting the urging force applied to the pressure adjusting valve 12. Then, after adjusting the screwing amount of the bolt 161 so as to obtain an appropriate urging force, the lock nut 162 is tightened to the bolt 161 and the support member 23, so that the adjusted urging force is maintained.

  3A and 3B are a sectional view and a bottom view showing the blade member 17. As shown in FIG. 3, the blade member 17 is formed by stamping or pressing a metal thin plate material such as stainless steel, and is fixed to the valve body 12. And a plurality of elastic pieces 42 extending to the primary side and slidingly contacting the sliding contact surface 215 formed by the inner peripheral surface of the primary port 11A. The fixing portion 41 is provided with an insertion hole 43 through which the locking portion 35 is inserted, and the insertion hole 43 is locked by the locking portion 35 so that the centers of the valve body 12 and the blade member 17 are on the axis L. Positioned. The fixing portion 41 is fixed to the surface of the disc portion 31 of the valve body 12 on the side of the primary port 11A by spot welding or the like, and the elastic piece 42 flows the refrigerant flowing from the primary port 11A to the secondary port 11B. It is provided on the road.

  Four elastic pieces 42 of the blade member 17 are provided at an angle of 90 ° to each other around the axis L, and at the intermediate position of the elastic pieces 42 in the extending direction, the elastic pieces 42 are bent radially outward in a chevron shape. A sliding contact portion 44 that comes into sliding contact with the sliding contact surface 215 is provided. An inclined portion 45 that is inclined with respect to the axis L is provided between the base end of the elastic piece 42 on the fixed portion 41 side and the sliding contact portion 44. On the other hand, a second inclined portion 46 inclined in a direction away from the sliding contact surface 215 is provided. Since the sliding contact portion 44 is formed at the top of the mountain that is convex toward the sliding surface 215 as described above, the sliding contact portion 44 slides substantially in point contact with the sliding surface 215. Become. Further, as shown in FIG. 2B, the inclined portion 45 receives the pressure from the refrigerant R passing through the gap between the valve seat 11 </ b> C and the valve body 12, and thereby the sliding portion contacts the sliding contact surface 215. 44 is formed so that the pressing force is increased.

  Note that the blade member 17 may have the form shown in FIG. 4A to 4C are a cross-sectional view and a bottom view showing a modified example of the blade member 17, and FIG. 4A is a cross-sectional view taken along line AOC in FIG. 4C. FIG. 4B is a cross-sectional view taken along line BOD in FIG. 4C. The blade member 17 shown in FIG. 4 has three first elastic pieces 42A and three second elastic pieces 42B, and the first elastic pieces 42A and the second elastic pieces 42B slide with each other. The height position of the contact portion 44 is different. The first elastic pieces 42A and the second elastic pieces 42B are provided alternately at an angle of 60 ° in the circumferential direction, and the three first elastic pieces 42A are axially symmetric with respect to the center O. , And the three second elastic pieces 42B are provided axially symmetric with respect to the center O. According to the blade member 17, the sliding contact portion 44 of the first elastic piece 42A and the sliding contact portion 44 of the second elastic piece 42B are at different height positions along the axis L direction with respect to the sliding contact surface 215. , The valve body 12 can be prevented from tilting even when the pressure regulating valve 10 undergoes lateral vibration (vibration in a direction perpendicular to the axis L), and the valve body 12 can be moved smoothly. .

  With the above configuration, when the refrigerant from the evaporator 100 flows into the primary port 11A, the pressure of the primary port 11A increases, and an upward valve opening force acts on the valve body 12, but the valve opening force is increased. Until the urging force of the bellows 13 and the valve spring 14 and the sliding resistance by the blade member 17 are exceeded, the valve body 12 does not separate. When the pressure of the primary port 11A further increases and the valve opening force exceeds the urging force and the sliding resistance, the valve element 12 separates from the valve seat 11C as shown in FIG. Refrigerant R flows from port 11A to secondary port 11B, and this refrigerant R is sent to compressor 200. At this time, when the inclined portion 45 of the blade member 17 receives pressure from the refrigerant R passing through the gap between the valve seat portion 11C and the valve body 12, the pressing force of the sliding contact portion 44 against the sliding contact surface 215 increases. As a result, the sliding resistance increases, and the vibration of the valve body 12 is suppressed. Also, when the pressure of the refrigerant from the evaporator 100 decreases and the valve opening force falls below the urging force of the bellows 13 and the valve spring 14, the valve body 12 moves in the valve closing direction. Hysteresis can be caused by the action of the sliding resistance. As a result, hunting of the valve element 12 can be prevented, and the valve element 12 can be properly seated on the valve seat portion 11C while suppressing vibration of the valve element 12.

  According to the above-described embodiment, since the blade member 17 is fixed to the primary side of the valve body 12 which is the flow path of the refrigerant, it is possible to improve the assemblability as compared with the case where the blade member 17 is provided inside the bellows 13. it can. Further, the blade member 17 is formed having a fixed portion 41 and a plurality of elastic pieces 42, and the plurality of elastic pieces 42 slide on the sliding contact surface 215 which is the inner peripheral surface of the primary port 11 </ b> A of the valve body 11. The contact makes it possible to provide stable sliding resistance to the valve element 12 and to simplify the configuration of the blade member 17 and the sliding contact surface 215.

  Further, the elastic piece 42 of the blade member 17 has a sliding contact portion 44 formed by bending in a mountain shape, and the sliding contact portion 44 is brought into sliding contact with the sliding contact surface 215 so that the sliding contact portion 44 is substantially pointed. The sliding contact surface 215 can be brought into contact with the sliding surface 215, so that a stable frictional resistance can be obtained, and it is possible to prevent the valve body 12 from being caught so as to hinder the movement thereof.

  Further, the inclined portion 45 of the elastic piece 42 of the blade member 17 receives the pressure from the fluid passing through the gap between the valve seat portion 11C and the valve body 12, and increases the pressing force of the sliding contact portion 44 against the sliding contact surface 215. By doing so, the pressing force acting on the valve body 12 from the blade member 17 at the time of opening the valve increases, and the vibration of the valve body 12 can be suppressed to improve the stability. On the other hand, when the valve is closed, since the fluid does not pass through the gap between the valve seat 11C and the valve body 12, the pressing force is smaller than when the valve is opened, and the valve body 12 is released by the pressure of the fluid on the primary side. The movement when sitting can be smooth.

  Further, since the second inclined portion 46 inclined in a direction away from the sliding surface 215 is provided at the tip of the elastic piece 42 of the blade member 17, the tip of the elastic piece 42 when assembling the pressure regulating valve 10 is provided. Is hardly caught around the valve seat 11C of the valve body 11, and the assemblability can be further improved.

  Next, a pressure regulating valve according to a second embodiment of the present invention will be described with reference to FIG. FIGS. 6A and 6B are enlarged cross-sectional views showing a main part of the pressure regulating valve 10 according to the second embodiment, FIG. 6A shows a valve closed state, and FIG. It is a figure showing a valve open state. The pressure regulating valve 10 of the present embodiment is different from the first embodiment in the configuration of the elastic member (blade member 17A). Hereinafter, differences from the first embodiment will be described in detail, and the same or similar components as those of the first embodiment will be denoted by the same reference numerals and description thereof may be omitted.

  The blade member 17 </ b> A is formed by punching or pressing from a metal thin plate material such as stainless steel, and is formed from a fixed portion 51 fixed to the upper surface of the locking claw portion 32 of the valve body 12 and a fixed portion 51. A plurality of elastic pieces 52 extending to the primary side and slidably in contact with the slidable contact surface 212A formed by the inner peripheral surface of the secondary chamber 212 of the valve body 11. The fixing portion 51 is fixed to the upper surface of the locking claw portion 32 by spot welding or the like, and the elastic piece 52 is provided in the flow path of the refrigerant flowing from the primary port 11A to the secondary port 11B.

  At an intermediate position of the elastic piece 52 of the blade member 17A in the extending direction, there is provided a sliding contact portion 53 which is bent outward in the radial direction and is in sliding contact with the sliding contact surface 212A. An inclined portion 54 that is inclined with respect to the axis L is provided between the base end of the elastic piece 52 on the fixed portion 51 side and the sliding contact portion 53, and the tip of the elastic piece 52 is located in the direction of the axis L closer to the distal end than the sliding contact 53. On the other hand, a second inclined portion 55 that is inclined in a direction away from the slidable contact surface 212A is provided. Since the sliding contact portion 53 is formed at the top of the mountain that is convex toward the sliding contact surface 212A in this manner, the sliding contact portion 53 slides substantially in point contact with the sliding contact surface 212A. Become. Further, as shown in FIG. 6B, the inclined portion 54 receives the pressure from the refrigerant R passing through the gap between the valve seat portion 11C and the valve body 12, thereby causing the sliding portion to contact the sliding surface 212A. The pressing force of 53 is formed to increase.

  According to the pressure regulating valve 10 of the present embodiment, substantially the same effects as in the first embodiment can be obtained, and the assemblability of the pressure regulating valve 10 can be improved. Further, the plurality of elastic pieces 52 of the blade member 17 </ b> A slide on the sliding contact surface 212 </ b> A, which is the inner peripheral surface of the secondary chamber 212 of the valve body 11, so that a stable sliding resistance is given to the valve body 12. And the configuration of the blade member 17A and the sliding contact surface 212A can be simplified. Further, since the elastic piece 52 of the blade member 17A is formed in a mountain shape having the inclined portion 54 and the second inclined portion 55, the vibration of the valve body 12 at the time of opening the valve is suppressed to improve the stability. And the assemblability when assembling the pressure regulating valve 10 can be further improved.

  Next, a pressure regulating valve according to a third embodiment of the present invention will be described with reference to FIG. FIGS. 7A and 7B are enlarged cross-sectional views showing a main part of the pressure regulating valve 10 according to the third embodiment, FIG. 7A shows a valve closed state, and FIG. It is a figure showing a valve open state. The pressure regulating valve 10 of the present embodiment is different from the first and second embodiments in the configuration of the elastic member (blade member 17B). Hereinafter, differences from the first and second embodiments will be described in detail, and the same or similar configurations as the first and second embodiments will be denoted by the same reference numerals and description thereof may be omitted.

  The blade member 17 </ b> B is formed by punching or pressing a metal thin plate material such as stainless steel, and fixed to the inner surface of the secondary chamber 212 of the valve body 11. A plurality of elastic pieces 62 extending to the side and slidably contacting the slidable contact surface 36 formed by the outer peripheral surface of the valve element 12. The fixing portion 61 is fixed by being sandwiched between a step portion on the inner surface of the secondary chamber 212 and the ring member 216, and the elastic piece 62 is provided in a flow path of the refrigerant flowing from the primary port 11A to the secondary port 11B. Have been.

  At an intermediate position of the elastic piece 62 of the blade member 17B in the extending direction, a sliding contact portion 63 that is bent radially inward in a mountain shape and slidingly contacts the sliding contact surface 36 is provided. An inclined portion 64 that is inclined with respect to the axis L is provided between the base end of the elastic piece 62 on the fixed portion 61 side and the sliding contact portion 63, and the tip end side of the elastic contact piece 62 in the direction of the axis L is closer to the distal end than the sliding contact portion 63. On the other hand, a second inclined portion 65 inclined in a direction away from the sliding contact surface 36 is provided. Since the sliding contact portion 63 is formed at the top of the mountain that is convex toward the surface 36 to be slid, the sliding portion 63 slidably contacts the surface 36 to be slid in substantially point contact. Become. Further, as shown in FIG. 7B, the inclined portion 64 receives the pressure from the refrigerant R passing through the gap between the valve seat portion 11C and the valve body 12, thereby causing the sliding portion to contact the sliding surface 36. 63 is formed so as to increase the pressing force.

  According to the pressure regulating valve 10 of the present embodiment, substantially the same effects as those of the first and second embodiments can be obtained, and the assemblability of the pressure regulating valve 10 can be improved. In addition, since the plurality of elastic pieces 62 of the blade member 17 </ b> B slidably contact the slidable contact surface 36 formed on the outer peripheral surface of the valve body 12, stable sliding resistance can be applied to the valve body 12. At the same time, the configurations of the blade member 17B and the sliding contact surface 36 can be simplified. Further, since the elastic piece 62 of the blade member 17B is formed in a mountain shape having the inclined portion 64 and the second inclined portion 65, the vibration of the valve body 12 at the time of opening the valve is suppressed to improve the stability. And the assemblability when assembling the pressure regulating valve 10 can be further improved.

  The present invention is not limited to the above-described embodiment, but includes other configurations and the like that can achieve the object of the present invention, and includes the following modifications and the like. For example, in the above-described embodiment, the pressure regulating valve 10 connected between the primary side evaporator 100 and the secondary side compressor 200 to adjust the evaporation pressure to a predetermined value has been described. May be provided at other positions in the refrigeration cycle. Further, in the above-described embodiment, the pressure regulating valve 10 used in the vehicle-mounted air conditioner is exemplified. However, the pressure regulating valve of the present invention is not limited to the vehicle-mounted air conditioner and is used in a house or building air conditioner. It may be used for a refrigerator or a refrigerator other than an air conditioner.

  Further, in the above embodiment, the pressure regulating valve 10 has the blade members 17, 17A, 17B which are elastic members, and the blade members 17, 17A, 17B are made of a thin metal material such as stainless steel. However, the elastic member is not limited to metal and may be made of resin, or may be made of a composite material of metal and resin. In the above-described embodiment, the elastic pieces 42, 52, 62 of the blade members 17, 17A, 17B, which are elastic members, are formed in a chevron shape bent at an intermediate position, and the bent contact portions 44, 53, 63 are provided on the bent tops. Is provided, but the shape of the elastic piece is not limited. That is, the elastic piece may be formed in a linear shape and a sliding contact portion may be provided at the tip, or the elastic piece may be formed in an arc shape and a sliding contact portion may be provided at an intermediate position. Further, the sliding contact portion may be constituted by a spherical convex portion protruding toward the sliding surface.

  Further, in the above-described embodiment, the case where a rubber O-ring is used as the pressing member 224 has been exemplified. However, the invention is not limited thereto, and a metal leaf spring or a wave washer (corrugated washer) may be used as the pressing member. . Further, in the above-described embodiment, the structure in which the first member 21 and the second member 22 of the valve body 11 are fixed by the stopper member 24 is exemplified. However, the invention is not limited thereto, and the opening edge of the first member 21 may be swaged. Alternatively, the first member 21 and the second member 22 may be fixed. In this case, the pressing member 224 may be unnecessary.

  In the above-described embodiment, the valve element 12 has the bleed hole 34 as a communication path for communicating the primary port 11A and the secondary chamber 212 even when the valve is closed. However, the present invention is not limited thereto, and the valve body 11 (the first member 21) may be provided with a communication passage that communicates the primary port 11A with the secondary chamber 212. Further, a groove is provided in one (or both) of the valve seat portion 11C and the valve body 12 on the contact surface between the valve seat portion 11C and the (disk portion 31 of) the valve body 12 and the grooves are connected. It may be a passage. The communication path may be omitted if unnecessary due to the characteristics of the device (refrigeration cycle) provided with the pressure regulating valve of the present invention.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and a design change or the like may be made without departing from the scope of the present invention. The present invention is also included in the present invention.

Reference Signs List 10 Pressure regulating valve 11 Valve body 11A Primary port 11B Secondary port 11C Valve seat 12 Valve 13 Bellows 14 Valve spring 17, 17A, 17B Blade member (elastic member)
41, 51, 61 Fixed portions 42, 52, 62 Elastic pieces 42A First elastic pieces 42B Second elastic pieces 44, 53, 63 Sliding portions 45, 54, 64 Inclined portions 46, 55, 65 Second inclined portion 36, 212A, 215 Sliding contact surface

Claims (8)

A pressure regulating valve that variably controls an opening according to a pressure acting on a valve body,
A valve body having a primary port, a secondary port, and a valve seat;
A valve body that is seated or unseated from the secondary side with respect to the valve seat portion,
A bellows having one end connected to the secondary side of the valve body and the other end connected to the valve body;
A valve spring that is provided inside the bellows and biases the valve body toward the valve seat;
An elastic member fixed to at least one of the valve body and the valve body and in contact with the other slidable contact surface in a pressed state,
The elastic member has a fixed portion fixed to one of the valve body and the valve body, and a plurality of elastic pieces extending from the fixed portion and slidingly contacting the sliding contact surface, from the primary side. A pressure regulating valve, which is provided in a flow path of a fluid flowing to a secondary side.   The fixed portion of the elastic member is fixed to a primary side of the valve body, and the plurality of elastic pieces extend from the fixed portion to a primary side and are formed by an inner peripheral surface of the primary side port. The pressure regulating valve according to claim 1, wherein the pressure regulating valve comes into sliding contact with the sliding surface.   The fixed portion of the elastic member is fixed to a secondary side of the valve body, and the plurality of elastic pieces extend from the fixed portion to the primary side and include an inner peripheral surface of the secondary side port. The pressure regulating valve according to claim 1, wherein the pressure regulating valve comes into sliding contact with the sliding contact surface.   The fixed portion of the elastic member is fixed inside the secondary port of the valve body, the plurality of elastic pieces extend to the primary side from the fixed portion, and at the outer peripheral surface of the valve body The pressure regulating valve according to claim 1, wherein the pressure regulating valve comes into sliding contact with the sliding contact surface.   At least three or more of the elastic pieces are provided, and at an intermediate position in the extending direction of the elastic piece, a sliding contact portion that refracts in a mountain shape toward the sliding contact surface and slides on the sliding contact surface. The pressure regulating valve according to any one of claims 1 to 4, wherein a pressure regulating valve is provided. The elastic piece includes a first elastic piece and a second elastic piece in which the sliding contact portion is provided at different positions along the axial direction of the valve body,
A plurality of the first elastic pieces and a plurality of the second elastic pieces are provided and alternately provided in the circumferential direction, a plurality of the first elastic pieces are provided axially symmetric, and a plurality of the second elastic pieces are provided. The pressure regulating valve according to claim 5, wherein the pressure regulating valve is provided axially symmetrically. An inclined portion that is inclined with respect to the axial direction of the valve body is provided between a base end of the elastic piece on the fixed portion side and the sliding contact portion,
The inclined portion receives a pressure from a fluid passing through a gap between the valve seat portion and the valve body, thereby increasing a pressing force of the sliding contact portion against the sliding contact surface. Item 7. The pressure regulating valve according to item 5 or 6.   A second inclined portion inclined in a direction away from the slidable contact surface with respect to an axial direction of the valve body is provided on a distal end side of the elastic piece with respect to the sliding contact portion. Item 8. The pressure regulating valve according to any one of Items 5 to 7.

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