JP2019173770A - Flow control device and water heating system - Google Patents

Abstract

To provide a flow control device which can inhibit backlash of a valve body from occurring in an axial direction of a valve stem, and to provide a water heating system including the flow control device.SOLUTION: A flow control device includes a body part 1, a valve stem 3, an annular valve body 5, and an annular elastic member S10. The body part 1 includes a passage 11A having a first opening 11 and a second opening 12. The valve stem 3 is disposed within the passage 11A of the body part 1, configured to be movable in an axial direction, and includes a groove part provided in a circumferential direction on an outer peripheral surface. The valve body 5 has a first through hole. The elastic member S10 has a second through hole. In a state that the valve stem 3 is inserted into the first through hole and the second through hole, the elastic member S10 is disposed at the groove part and is sandwiched between an inner wall part of the groove part and an outer wall part of the valve body in the axial direction to press the valve body 5 in the axial direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a flow rate adjusting device and a hot water device.

  Conventionally, a flow rate adjusting device for adjusting the flow rate of the hot water device has been used. This flow control device is described in, for example, Japanese Patent Application Laid-Open No. 2006-23906 (Patent Document 1). In the flow rate adjusting device described in this publication, in a state where the valve shaft is inserted into the through hole provided in the annular valve body, the snap ring attached to the groove portion provided on the outer periphery of the valve shaft is used. The position with respect to the valve shaft is regulated.

Japanese Patent Laid-Open No. 2006-23906

  When the position of the valve body with respect to the valve shaft is regulated by the snap ring attached to the groove provided on the outer periphery of the valve shaft as in the flow rate adjusting device described in the above publication, the snap ring is attached to the groove. In addition, the width of the groove is provided to be larger than the width of the snap ring in the axial direction of the valve shaft. Therefore, a gap is generated between the snap ring and the valve body in the axial direction of the valve shaft. For this reason, shakiness of the valve body occurs in the axial direction of the valve shaft. As a result, there is a problem that variations in flow characteristics occur.

  This invention is made | formed in view of the said subject, The objective is the flow volume adjusting device which can suppress that the shading of a valve body arises in the axial direction of a valve shaft, and a hot water apparatus provided with the same. Is to provide.

  The flow control device of the present invention includes a main body, a valve shaft, an annular valve body, and an annular elastic member. The main body includes a flow path having a first opening and a second opening. The valve shaft is disposed in the flow path of the main body, is configured to be movable in the axial direction, and includes a groove provided in the circumferential direction on the outer peripheral surface. The valve body has a first through hole. The elastic member has a second through hole. When the valve shaft is inserted into the first through hole and the second through hole, the elastic member is disposed in the groove portion, and is sandwiched between the inner wall portion of the groove portion and the outer wall portion of the valve body in the axial direction. The valve body is pressed in the axial direction. According to the flow rate adjusting device of the present invention, since the elastic member presses the valve body in the axial direction of the valve shaft, it is possible to suppress the rattling of the valve body in the axial direction.

  In the above flow rate adjusting device, the elastic member presses the valve body in the radial direction by being sandwiched between the inner peripheral portion of the valve body and the bottom of the groove portion in the radial direction of the valve shaft. For this reason, since the elastic member presses the valve body in the radial direction of the valve shaft, movement of the valve body in the axial direction is suppressed. Thereby, it can suppress that the valve body rattles in the axial direction.

  In the flow rate adjusting device, in the state where the elastic member presses the valve body in the axial direction, the depth of the groove portion is smaller than a quarter of the difference between the outer diameter and the inner diameter of the annular elastic member. large. For this reason, it can suppress that an elastic member slips out from a groove part.

  In the above flow rate adjusting device, the valve body includes a valve main body and a flange that protrudes in the axial direction from the valve main body and covers the outer periphery of the elastic member. The elastic member is in contact with the flange portion and the groove portion. For this reason, it is possible to suppress the elastic member from falling off the valve shaft.

  In the above flow rate adjusting device, the elastic member includes an inner peripheral surface and a convex portion protruding from the inner peripheral surface to the inner peripheral side. For this reason, it is possible to suppress the elastic member from falling off the valve shaft while improving the insertability of the valve shaft into the second through hole.

  In the above flow control device, the material of the valve shaft is resin. For this reason, the elastic member can be attached to the valve shaft by inserting the valve shaft into the second through hole of the elastic member. Therefore, the force applied in the radial direction of the valve shaft when the elastic member is attached to the valve shaft can be reduced. Therefore, even if the material of the valve shaft is resin, the valve shaft can be prevented from being damaged when the elastic member is attached to the valve shaft. Since the material of the valve shaft is resin, the cost of the valve shaft can be reduced.

  The hot water device of the present invention includes the above-described flow rate adjusting device, a heat exchanger connected to the first opening, and a hot water supply channel connected to the second opening. For this reason, the hot water apparatus provided with the flow volume adjustment apparatus which can suppress that the shakiness of a valve body arises to an axial direction can be provided.

  As described above, according to the present invention, it is possible to prevent the valve body from rattling in the axial direction.

It is a perspective view which shows roughly the structure of the flow volume adjustment apparatus in one embodiment of this invention. It is the front view which looked at the composition of the flow control device in one embodiment of the present invention from the 1st opening side. It is a disassembled perspective view which shows roughly the structure of the flow volume adjustment apparatus in one embodiment of this invention. It is sectional drawing which follows the IV-IV line of FIG. It is an enlarged view of the V section of FIG. It is a perspective view which shows roughly a mode that a valve body is attached to the valve stem of the flow regulating device in one embodiment of this invention. It is a perspective view which shows roughly a mode that an elastic member is attached to the valve shaft of the flow regulating device in one embodiment of this invention. It is a side view which shows roughly the state by which the valve body and the elastic member were attached to the valve axis | shaft of the flow regulating device in one embodiment of this invention. It is sectional drawing which shows roughly the state by which the valve body and the elastic member were attached to the valve shaft of the flow volume adjustment apparatus of the modification 1 in one embodiment of this invention. It is a perspective view which shows roughly the state by which the valve body, the elastic member, and the collar part were attached to the valve shaft of the flow volume adjustment apparatus of the modification 2 in one embodiment of this invention. It is sectional drawing which follows the XI-XI line of FIG. It is a perspective view which shows roughly the state by which the valve body, the elastic member, and the collar part were attached to the valve shaft of the flow volume adjustment apparatus of the modification 3 in one embodiment of this invention. It is sectional drawing which follows the XIII-XIII line | wire of FIG. It is a perspective view which shows roughly a mode that an elastic member is attached to the valve shaft of the flow volume adjustment apparatus of the modification 3 in one embodiment of this invention. It is a side view which shows roughly the state by which the valve body and the elastic member were attached to the valve shaft of the flow volume adjustment apparatus of the modification 3 in one embodiment of this invention. It is sectional drawing which shows roughly the state by which the valve body and the elastic member were attached to the valve shaft of the flow volume adjustment apparatus of the modification 4 in one embodiment of this invention. It is a perspective view which shows roughly the state by which the valve body, the elastic member, and the collar part were attached to the valve shaft of the flow volume adjustment apparatus of the modification 5 in one embodiment of this invention. It is sectional drawing which follows the XVIII-XVIII line of FIG. It is a perspective view which shows roughly the structure of the valve body of the flow volume adjustment apparatus of the modification 6 in one embodiment of this invention. It is a front view which shows roughly the structure of the valve body of the flow volume adjustment apparatus of the modification 6 in one embodiment of this invention. It is a side view which shows roughly the state by which the valve body and the snap ring were attached to the valve axis | shaft of the flow volume adjustment apparatus of a comparative example. It is a perspective view which shows roughly a mode that a valve body is attached to the valve shaft of the flow volume adjustment apparatus of a comparative example. It is a perspective view which shows roughly a mode that a snap ring is attached to the valve shaft of the flow volume adjustment apparatus of a comparative example. It is a perspective view which shows roughly the state by which the valve body and the snap ring were attached to the valve shaft of the flow volume adjustment apparatus of a comparative example. It is a figure which shows the structure of the hot water apparatus in one embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description will not be repeated.

  With reference to FIGS. 1-4, the structure of the flow volume adjustment apparatus in one embodiment of this invention is demonstrated.

  As shown in FIGS. 1 to 3, the flow rate adjustment device in the present embodiment mainly includes a main body 1, a collar 2, a valve shaft 3, a drive 4, and a valve body 5. ing. A collar portion 2, a valve shaft 3, and a valve body 5 are accommodated in the main body portion 1. The drive unit 4 is attached to the main body 1 by screws B1. As will be described later, the drive shaft 4 is configured so that the valve shaft 3 and the valve body 5 can be rotationally driven in the main body 1.

  As shown in FIGS. 3 and 4, the main body 1 has a flow path 11 </ b> A inside. The flow path 11 </ b> A includes a first opening (water flow path) 11, a second opening (first water flow path) 12, and a third opening (second water flow path) 13. The water inlet channel 11, the first water outlet channel 12, and the second water outlet channel 13 are provided inside the main body 1. The first water discharge channel 12 and the second water discharge channel 13 are branched from the water input channel 11 inside the main body 1. The incoming water channel 11 is a channel through which hot water flowing into the flow rate adjusting device flows. The 1st water flow path 12 and the 2nd water flow path 13 are flow paths through which the hot water which flows out from a flow control device flows.

  As shown in FIGS. 2 and 4, the main body 1 further includes a guide portion 14. The guide part 14 is provided inside the water inlet channel 11. The guide part 14 has a guide body 14a, a second through hole 14b, and a rib 14c. The guide main body 14 a is arranged inside the water inlet channel 11. The guide body 14a has, for example, a cylindrical shape. From another viewpoint, the guide body 14a is provided with a second through hole 14b. The second through hole 14 b is provided along the extending direction of the water inlet channel 11. The valve shaft 3 is inserted into the second through hole 14b. That is, the valve shaft 3 is guided by the second through hole 14b.

  The guide body 14a is disposed inside the water inlet channel 11 by the rib 14c. The rib 14c connects the inner peripheral surface of the water inlet channel 11 and the outer peripheral surface of the guide body 14a. The rib 14 c extends from the inner peripheral surface of the water inlet channel 11 in a direction toward the center of the water inlet channel 11.

  The main body 1 further has a valve seat 15. The valve seat 15 is provided on the inner peripheral surface of the water inlet channel 11. The valve seat 15 is disposed at a position facing the valve body 5. More specifically, the valve seat 15 extends in a direction from the inner peripheral surface of the water inlet channel 11 toward the center of the water inlet channel 11. The valve seat 15 is disposed downstream of the guide portion 14 in the flowing direction of hot water.

  The collar portion 2 is disposed inside the main body portion 1. The collar portion 2 has a first end 2a and a second end 2b. The collar portion 2 is arranged so that the first end 2a faces the water inlet channel 11 side. The second end 2b is an end opposite to the first end 2a. That is, the collar portion 2 is arranged so that the second end 2b faces the drive portion 4 side. The direction from the first end 2 a to the second end 2 b is along the extending direction of the water inlet channel 11.

  The collar portion 2 is provided with a first through hole 21. The first through hole 21 extends from the first end 2 a toward the second end 2 b and penetrates the collar portion 2. If this is said from another viewpoint, the 1st through-hole 21 is provided along the extension direction of the inflow channel 11. As shown in FIG. A thread groove 22 is formed on the inner peripheral surface of the first through hole 21. The portion of the first through hole 21 in which the screw groove 22 is formed is located on the second end 2b side. A groove 23 is provided on the outer peripheral surface of the collar portion 2. An O-ring S20 is disposed in the groove 23. The O-ring S20 ensures water tightness between the main body 1 and the collar 2 on the second end 2b side than the O-ring S20.

  The material of the valve shaft 3 is preferably resin. The resin used for the valve shaft 3 is, for example, PPS (polyphenylene sulfide). The valve shaft 3 has a first end 3a and a second end 3b. The second end 3b is an end opposite to the first end 3a. Hereinafter, the direction in which the first end 3 a and the second end 3 b face each other may be referred to as the axial direction of the valve shaft 3.

  The valve shaft 3 is disposed in the flow path 11 </ b> A of the main body 1. The valve shaft 3 is configured to be movable in the axial direction. The valve shaft 3 is inserted into the first through hole 21. The valve shaft 3 is inserted into the second through hole 14b. The valve shaft 3 is inserted into the first through hole 21 and the second through hole 14b so that the first end 3a faces the water inlet channel 11 side. The valve shaft 3 is attached to the drive unit 4 at the second end 3b. On the outer peripheral surface of the valve shaft 3, a thread 30 is formed on the second end 3b side. The screw thread 30 is screwed into the screw groove 22.

  The valve shaft 3 has a sliding portion 3c. The sliding portion 3 c is a portion of the valve shaft 3 that slides with the inner peripheral surface of the first through hole 21. The valve shaft 3 is provided with an O-ring groove 3d. A plurality of O-ring grooves 3d may be arranged. An O-ring 3e is disposed in the O-ring groove 3d. The O-ring 3e ensures water tightness between the valve shaft 3 and the inner peripheral surface of the first through hole 21.

  The drive unit 4 is configured to move the valve shaft 3 along the axial direction. The drive unit 4 is, for example, a stepping motor. More specifically, the drive unit 4 rotates the valve shaft 3 around the central axis of the valve shaft 3. As described above, the first through hole 21 has the screw groove 22, and the valve shaft 3 has the screw thread 30 that is screwed into the screw groove 22. Therefore, when the drive unit 4 rotates the valve shaft 3 around the central axis, the valve shaft 3 moves along the central axis.

  In the following, moving the valve shaft 3 in the direction in which the exposure from the first end 2a side of the collar portion 2 is increased is referred to as advance, and the exposure from the first end 2a side of the collar portion 2 is reduced. Moving the valve shaft 3 in the direction is sometimes referred to as retreat.

  As described above, the valve shaft 3 has the sliding portion 3 c that slides with the inner peripheral surface of the first through hole 21. Therefore, the movement of the valve shaft 3 along the axial direction is guided by the first through hole 21.

  The valve body 5 is attached to the valve shaft 3. The valve body 5 is attached to the valve shaft 3 so as to face the valve seat 15. The valve body 5 is attached so that the flow path between the valve body 5 and the valve seat 15 is narrowed by the drive unit 4 moving the valve shaft 3 forward.

  In a state where the flow path between the valve body 5 and the valve seat 15 is narrow, hot water is substantially transferred from the water inlet flow path 11 side to the first water discharge flow path 12 and the second water discharge flow path 13 side. Water will not pass. The flow path between the valve body 5 and the valve seat 15 is not completely stopped. In the following, the flow path between the valve body 5 and the valve seat 15 is narrowed, and hot water substantially passes from the inlet flow path 11 side to the first discharge flow path 12 and second discharge flow path 13 sides. The state that does not occur is sometimes called a closed state.

  As the valve shaft 3 is retracted from the closed state, the distance between the valve body 5 and the valve seat 15 increases. By increasing the distance between the valve body 5 and the valve seat 15, the flow rate of hot water flowing from the water inlet channel 11 side to the first water outlet channel 12 and the second water outlet channel 13 side increases.

  As described above, in the flow rate adjusting device according to the embodiment, the drive unit 4 adjusts the position of the valve body 5 attached to the valve shaft 3 to change the interval between the valve body 5 and the valve seat 15. The flow rate of hot water flowing from the inlet channel 11 to the first outlet channel 12 and the second outlet channel 13 side is adjusted.

  Referring to FIG. 5, the valve shaft 3 has a small diameter portion 32 and a large diameter portion 33. The small diameter portion 32 is disposed on the first end 3 a side with respect to the large diameter portion 33. The valve body 5 is configured in an annular shape. The valve body 5 has a first through hole H1. The first through hole H <b> 1 extends along the axial direction of the valve shaft 3. The valve body 5 is attached to the valve shaft 3 in a state where the valve shaft 3 is inserted into the first through hole H1. Specifically, the small diameter portion 32 of the valve shaft 3 is inserted into the first through hole H <b> 1 of the valve body 5. The valve body 5 is in contact with the wall surface of the large diameter portion 33 on the small diameter portion 32 side.

  The valve shaft 3 has a groove portion 31 provided in the circumferential direction on the outer peripheral surface. Specifically, the groove portion 31 is provided in the small diameter portion 32 of the valve shaft 3. An end portion on the first end 3a side in the axial direction of the groove portion 31 constitutes an inner wall portion IW. The groove portion 31 is disposed so as to overlap the end portion on the first end 3 a side in the axial direction of the valve body 5 in a state where the valve body 5 is in contact with the wall surface on the small diameter portion 32 side of the large diameter portion 33. . An end portion on the first end 3 a side in the axial direction of the valve body 5 constitutes an outer wall portion OW of the valve body 5. The inner wall portion IW of the groove portion 31 and the outer wall portion OW of the valve body 5 are arranged to face each other.

  In the groove portion 31, an elastic member S10 is disposed. The elastic member is configured in an annular shape. The elastic member S10 has a second through hole H2. The elastic member S10 may be an O-ring. The second through hole H <b> 2 extends along the axial direction of the valve shaft 3. The elastic member S10 is attached to the valve shaft 3 in a state where the valve shaft 3 is inserted into the second through hole H2.

  The elastic member S10 is disposed in the groove 31 in a state where the valve shaft 3 is inserted into the first through hole H1 and the second through hole H2. In this state, the elastic member S10 presses the valve body 5 in the axial direction by being sandwiched between the inner wall portion IW of the groove portion 31 and the outer wall portion OW of the valve body 5 in the axial direction. That is, the elastic member S10 is elastically deformed in the axial direction by being sandwiched between the inner wall portion IW of the groove portion 31 and the outer wall portion OW of the valve body 5 in the axial direction. The elastic member S10 presses the valve body 5 in the axial direction by a restoring force to restore the elastic deformation in the axial direction.

  In FIG. 5, the shape of the elastic member S10 before elastic deformation is indicated by a broken line. In addition, below, the shape before elastic deformation of the elastic member S10 is appropriately indicated by a broken line. The diameter of the elastic member S10 before elastic deformation is larger than the fixed width in the axial direction (thrust direction). This fixed width is a width between the inner wall portion IW of the groove portion 31 and the outer wall portion OW of the valve body 5 in the axial direction.

  Further, the elastic member S10 presses the valve body 5 in the radial direction by being sandwiched between the inner peripheral portion IS of the valve body 5 and the bottom portion BS of the groove portion 31 in the radial direction of the valve shaft 3. That is, the elastic member S <b> 10 is elastically deformed in the radial direction by being sandwiched between the inner peripheral portion IS of the valve body 5 and the bottom portion BS of the groove portion 31 in the radial direction of the valve shaft 3. The elastic member S10 presses the valve body 5 in the radial direction by a restoring force to restore the elastic deformation in the radial direction.

  With reference to FIGS. 6-8, a mode that the valve body 5 and the elastic member S10 are attached to the valve shaft 3 is demonstrated. As shown in FIG. 6, the valve shaft 3 is inserted into the first through hole H <b> 1 of the valve body 5 in the axial direction indicated by the arrow in the drawing. The valve body 5 moves in the axial direction until it contacts the wall surface of the large diameter portion 33 on the small diameter portion 32 side. Subsequently, as shown in FIG. 7, the valve shaft 3 is inserted into the second through hole H2 of the elastic member S10 in the axial direction indicated by the arrow in the drawing. The elastic member S10 moves in the axial direction until it fits into the groove 31. As shown in FIG. 8, when the elastic member S <b> 10 is fitted into the groove portion 31, the valve body 5 is fixed between the elastic member S <b> 10 and the large diameter portion 33 of the valve shaft 3.

  Next, with reference to FIGS. 9-21, the flow volume adjustment apparatus of the modification in this Embodiment is demonstrated.

  FIG. 9 shows a state in which the valve body 5 is attached to the valve shaft 3 and the elastic member S <b> 10 is disposed in the groove portion 31. As shown in FIG. 9, in the flow rate adjusting device of Modification 1 in the present embodiment, the wire diameter of the elastic member S10 is half the difference between the outer diameter and the inner diameter of the annular elastic member S10. In a state where the elastic member S10 presses the valve body 5 in the axial direction, the depth Dc of the groove portion 31 is larger than a quarter of the difference between the outer diameter and the inner diameter of the annular elastic member S10. That is, the depth Dc of the groove is larger than half the wire diameter of the elastic member S10 in a state where the elastic member S10 presses the valve body 5 in the axial direction.

  As shown in FIG. 10 and FIG. 11, in the flow rate adjustment device of Modification 2 in the present embodiment, the valve body 5 has a valve body 5 a and a flange 5 b. The flange portion 5b protrudes from the valve body 5a in the axial direction. The axial width of the flange 5b is larger than the wire diameter of the elastic member S10. The flange portion 5b is configured to cover the outer periphery of the elastic member S10. The collar portion 5b is formed in an annular shape. The flange portion 5b is provided over the entire circumference of the valve shaft 3 in the circumferential direction. The elastic member S10 is in contact with the flange portion 5b and the groove portion 31. That is, the elastic member S <b> 10 is sandwiched between the flange portion 5 b and the groove portion 31 in the radial direction of the valve shaft 3.

  As shown in FIG. 12 and FIG. 13, in the flow rate adjustment device of Modification 3 in the present embodiment, the elastic member S <b> 10 is configured in a cylindrical shape. The width in the axial direction of the valve shaft 3 of the elastic member S10 is uniform over the entire circumference in the circumferential direction of the elastic member S10. That is, the elastic member S10 is a so-called flat packing.

  As shown in FIG. 14, in a state where the valve shaft 3 is inserted into the first through hole H1 of the valve body 5, the valve shaft 3 extends into the second through hole H2 of the elastic member S10 in the axial direction indicated by the arrow in the figure. Inserted. The elastic member S10 moves in the axial direction until it fits into the groove 31. As shown in FIG. 15, when the elastic member S <b> 10 is fitted into the groove portion 31, the valve body 5 is fixed between the elastic member S <b> 10 and the large-diameter portion 33 of the valve shaft 3.

  As shown in FIG. 16, in the flow rate adjustment device of Modification 4 in the present embodiment, the elastic member S <b> 10 is a flat packing. FIG. 16 shows a state in which the valve body 5 is attached to the valve shaft 3 and the elastic member S <b> 10 is disposed in the groove portion 31. In the flow rate adjustment device according to the fourth modification of the present embodiment, the depth Dc of the groove 31 is determined by the outer diameter and the inner diameter of the annular elastic member S10 in a state where the elastic member S10 presses the valve body in the axial direction. Is larger than a quarter of the difference.

  As shown in FIGS. 17 and 18, in the flow rate adjusting device of Modification 5 in the present embodiment, the elastic member S <b> 10 is a flat packing. In the flow rate adjusting device according to the fourth modification of the present embodiment, the valve body 5 includes a valve body 5a and a flange portion 5b. The flange portion 5b protrudes from the valve body 5a in the axial direction. The flange portion 5b is configured to cover the outer periphery of the elastic member S10. The collar portion 5b is formed in an annular shape. The elastic member S10 is in contact with the flange portion 5b and the groove portion 31. That is, the elastic member S <b> 10 is sandwiched between the flange portion 5 b and the groove portion 31 in the radial direction of the valve shaft 3.

  As shown in FIG. 19 and FIG. 20, in the flow rate adjustment device of Modification 5 in the present embodiment, the elastic member S <b> 10 is a flat packing. The elastic member S10 has a convex portion S10a and an inner peripheral surface S10b. The convex portion S10a protrudes from the inner peripheral surface S10b to the inner peripheral side. In the present embodiment, the convex portions S10a are arranged at equal intervals. Further, the convex portion S10a is arranged so as to be shifted by 45 degrees in the circumferential direction of the annular elastic member S10. That is, eight convex portions S10a are provided. The radial thickness at the position of the convex portion S10a of the elastic member S10 is De. The radial thickness at the position of the inner peripheral surface S10b of the elastic member S10 is Df. The thickness De is larger than the thickness Df.

Next, the effects of the present embodiment and the modification will be described in comparison with a comparative example.
FIG. 21 shows a state in which the valve body and the snap ring S30 are attached to the valve shaft 3 of the flow rate adjusting device of the comparative example, and shows a configuration corresponding to FIG. The snap ring S30 is a so-called E ring. In the flow rate adjustment device of the comparative example, in order to attach the snap ring S30 to the groove portion 31, the groove portion 31 is provided so that the width of the groove portion 31 is larger than the width of the snap ring S30 in the axial direction DR of the valve shaft 3. Accordingly, a gap GP is generated between the snap ring S30 and the valve body 5 in the axial direction DR of the valve shaft 3. For this reason, rattling of the valve body 5 occurs in the axial direction DR of the valve shaft 3. As a result, there is a problem that variations in flow characteristics occur.

  Further, as shown in FIG. 22, the valve shaft 3 is inserted into the first through hole H <b> 1 of the valve body 5. As shown in FIG. 23, the snap ring S30 is attached to the groove 31 from the radial direction of the valve shaft 3 in this state. As shown in FIG. 24, the snap ring S30 is fitted in the groove 31. Since the snap ring S30 is attached from the radial direction of the valve shaft 3, a large force is applied to the valve shaft 3 in the radial direction. Thereby, the valve shaft 3 may be damaged.

  On the other hand, in the flow rate adjusting device in the present embodiment, as shown in FIG. 5, the elastic member S <b> 10 has the valve shaft 3 inserted in the first through hole H <b> 1 and the second through hole H <b> 2. The valve body 5 is pressed in the axial direction by being disposed in the groove portion 31 and being sandwiched between the inner wall portion IW of the groove portion 31 and the outer wall portion OW of the valve body 5 in the axial direction. Therefore, since the elastic member S10 presses the valve body 5 in the axial direction of the valve shaft 3, it is possible to suppress the rattling of the valve body 5 in the axial direction. Therefore, it is possible to suppress the occurrence of variations in flow rate characteristics.

  Further, since the elastic member S10 is inserted into the valve shaft 3 from the axial direction, the force applied to the valve shaft 3 during insertion can be suppressed. Furthermore, the installation for inserting in the valve shaft 3 becomes unnecessary.

  Further, since the elastic member S10 is configured to be elastically deformed, an impact at the time of insertion can be suppressed. Further, the valve shaft 3 can be prevented from being cut.

  Moreover, since the valve body 5 is pressed on the opposite side to the elastic member S10 by the water pressure of hot water, it is suppressed that an excessive force is applied to the elastic member S10. For this reason, the possibility that the elastic member S10 comes off over time is suppressed.

  In the flow rate adjusting device in the present embodiment, the elastic member S10 presses the valve body 5 in the radial direction by being sandwiched between the inner peripheral portion IS of the valve body and the bottom BS of the groove portion 31 in the radial direction of the valve shaft 3. ing. For this reason, since the elastic member S10 presses the valve body 5 in the radial direction of the valve shaft 3, the movement of the valve body 5 in the axial direction is suppressed. Thereby, it can suppress that rattling arises in the valve body 5 to an axial direction.

  In the flow rate adjusting device in the present embodiment, the material of the valve shaft 3 is preferably resin. For this reason, the elastic member S10 can be attached to the valve shaft 3 by inserting the valve shaft 3 into the second through hole H2 of the elastic member S10. Therefore, the force applied in the radial direction of the valve shaft 3 when the elastic member S10 is attached to the valve shaft 3 can be reduced. Therefore, even if the material of the valve shaft 3 is resin, it is possible to prevent the valve shaft 3 from being damaged when the elastic member S10 is attached to the valve shaft 3. Since the material of the valve shaft 3 is resin, the cost of the valve shaft 3 can be reduced.

  As shown in FIG. 9, in the flow rate adjusting device of the first modification in the present embodiment, the depth Dc of the groove 31 is an annular shape in a state where the elastic member S10 presses the valve body 5 in the axial direction. It is larger than a quarter of the difference between the outer diameter and inner diameter of the elastic member S10. Therefore, the depth Dc of the groove part 31 is larger than half the wire diameter of the elastic member S10. For this reason, it can suppress that elastic member S10 slips out from the groove part 31. FIG.

  As shown in FIG. 11, in the flow rate adjusting device of Modification 2 in the present embodiment, the elastic member S <b> 10 is in contact with the flange portion 5 b and the groove portion 31. Therefore, the elastic member S10 is fixed on both sides of the outer diameter and the inner diameter of the elastic member S10. For this reason, it is possible to suppress the elastic member S10 from falling off the valve shaft 3.

  As shown in FIG. 20, the elastic member S10 includes an inner peripheral surface S10b and a convex portion S10a protruding from the inner peripheral surface S10b to the inner peripheral side. For this reason, it is possible to suppress the elastic member S10 from falling off the valve shaft 3 while improving the insertability of the valve shaft 3 into the second through hole H2. That is, since the contact area between the outer peripheral surface of the valve shaft 3 and the second through hole H2 is reduced by the inner peripheral surface S10b, the insertability of the valve shaft 3 into the second through hole H2 can be improved. Further, when the elastic member S10 comes into contact with the valve shaft 3 at the convex portion S10a, it is possible to ensure the drop-off resistance of the elastic member S10 from the valve shaft 3. Therefore, it is possible to achieve both improved insertability and drop-off resistance.

Next, with reference to FIG. 25, the hot water apparatus 100 in this Embodiment is demonstrated.
As shown in FIG. 25, the hot water device 100 in the present embodiment includes a flow rate adjusting device 7, a hot water supply channel 8, and a pouring channel 9.

  The flow rate adjusting device 7 is the flow rate adjusting device in the present embodiment. The hot water supply channel 8 is a channel for supplying heated clean water to a currant or the like. The pouring channel 9 is a channel for supplying heated water to the bathtub 10.

  The hot water supply channel 8 includes a pipe 81, a pipe 82, a pipe 83, and a heat exchanger 84. A water supply is connected to one end of the pipe 81. One end of the heat exchanger 84 is connected to the other end of the pipe 81. One end of the pipe 82 is connected to the other end of the heat exchanger 84. The water inlet channel 11 of the flow rate adjusting device 7 is connected to the other end of the pipe 82. The first outlet channel 12 of the flow rate adjusting device 7 is connected to one end of the pipe 83.

  A burner 85 is disposed in the vicinity of the heat exchanger 84. The heat exchanger 84 heats the clean water supplied from the pipe 81 by heat exchange with the combustion gas emitted from the burner 85. The heated clean water flowing through the pipe 82 is supplied to a currant or the like connected to the other end of the pipe 83 via the flow rate adjusting device 7 and the pipe 83.

  The pouring channel 9 includes a pipe 91, a pipe 92, and a pouring electromagnetic valve 93. The second outlet channel 13 of the flow rate adjusting device 7 is connected to one end of the pipe 91. One end of a pouring electromagnetic valve 93 is connected to the other end of the pipe 91. The other end of the pouring electromagnetic valve 93 is connected to one end of the pipe 92. The bathtub 10 is connected to the other end of the pipe 92. The heated clean water flowing through the pipe 82 is supplied to the bathtub 10 via the flow rate adjusting device 7, the pipe 91, the pipe 92, and the pouring electromagnetic valve 93.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include meanings equivalent to the scope of claims and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 1 Main-body part, 2 color | collar part, 3 valve stem, 4 drive part, 5 valve body, 5a valve main body, 5b collar part, 7 flow regulating device, 8 hot-water supply flow path, 9 hot-water flow path, 10 bathtub, 11 incoming flow path , 11A channel, 12 first outlet channel, 13 second outlet channel, 14 guide part, 15 valve seat, 31 groove part, 100 hot water device, H1 first through hole, H2 second through hole, IS inner peripheral part , IW inner wall part, OW outer wall part, S10 elastic member, S10b inner peripheral surface, S10a convex part.

Claims (7)

A main body including a flow path having a first opening and a second opening;
A valve shaft that is disposed in the flow path of the main body portion, is configured to be movable in the axial direction, and includes a groove portion provided in the circumferential direction on the outer peripheral surface;
An annular valve body having a first through hole;
An annular elastic member having a second through hole,
In a state where the valve shaft is inserted into the first through hole and the second through hole, the elastic member is disposed in the groove portion, and the inner wall portion of the groove portion and the valve body are disposed in the axial direction. A flow rate adjustment device that presses the valve body in the axial direction by being sandwiched between outer wall portions.   2. The flow rate according to claim 1, wherein the elastic member presses the valve body in the radial direction by being sandwiched between an inner peripheral part of the valve body and a bottom part of the groove part in a radial direction of the valve shaft. Adjustment device.   In the state where the elastic member presses the valve body in the axial direction, the depth of the groove is larger than a quarter of the difference between the outer diameter and the inner diameter of the annular elastic member. The flow rate adjusting device according to claim 1 or 2. The valve body includes a valve body, and a flange that protrudes from the valve body in the axial direction and covers an outer periphery of the elastic member,
The flow rate adjusting device according to claim 1, wherein the elastic member is in contact with the flange portion and the groove portion.   The flow rate adjusting device according to any one of claims 1 to 4, wherein the elastic member includes an inner peripheral surface and a convex portion protruding from the inner peripheral surface toward the inner peripheral side.   The flow rate adjusting device according to claim 1, wherein a material of the valve shaft is resin. A flow rate adjustment device according to any one of claims 1 to 6,
A heat exchanger connected to the first opening;
A hot water apparatus comprising a hot water supply channel connected to the second opening.

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