JP4314170B2 - Bath circulator - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a tub circulating tool to which a circulation supply pipe and a return pipe are connected from a circulating hot water supply device outside a bathtub while being fixed to a side wall of the bathtub.

As this kind of bathtub circulation tool, for example, the one described in Patent Document 1 is known. This bathtub circulation tool includes a first connection part and a second connection part to which a hot water supply pipe and a return pipe are connected to a circulation type hot water heater provided outside the bathtub. Moreover, the circulation tool for bathtubs has a 1st connection part or a 2nd suction port for a circulating water heater to suck in the bathtub water in a bathtub via a 1st connection part or a 2nd connection part, or a 1st connection part or The circulating water heater includes a first discharge port and a second discharge port for supplying heated water into the bathtub through the second connection portion. Furthermore, a first check valve having a floating ball lighter than water as a valve body is provided on the flow path that connects the first connection portion and the first discharge port, and the second connection portion and the second discharge port are communicated with each other. A second check valve similar to the first check valve is provided on the flow path. And the heating water supplied via the 1st connection part from the circulation type water heater is supplied in a bathtub from a 1st discharge port through a 1st check valve. On the other hand, the bathtub water in the bathtub is regulated to be sucked from the second discharge port by the second check valve, and sucked into the return pipe side through the second suction port. On the contrary, the heated water supplied from the circulating water heater through the second connection portion is supplied from the second discharge port into the bathtub through the second check valve. On the other hand, the bathtub water in the bathtub is regulated to be sucked from the first discharge port by the first check valve, and is sucked into the return pipe side through the first suction port.
Japanese Patent Laid-Open No. 10-325614 (pages 6 to 7, FIGS. 19 to 24)

  Generally, the circulator for bathtubs is attached and fixed at the left and right central positions on one of both side walls facing each other in the longitudinal direction of the bathtub. It is desirable that the bathtub water discharged from the bathtub circulation device into the bathtub is discharged substantially downward from the bathtub circulation device. This can move the heated water discharged from the circulator for bathtubs into the bathtub along the bottom surface of the bathtub in the longitudinal direction of the bathtub, and heat the entire bathtub water with a relatively low temperature on the bathtub bottom surface side. This is because the temperature difference generated in the bathtub water in the entire bathtub can be minimized because water can be mixed well.

  However, in the bathtub circulation device of Patent Document 1, the heated water supplied from the circulating water heater is discharged diagonally downward to the left or right of the bathtub circulation device from a hot water passage that opens obliquely downward to the left or right. It is like that. For this reason, since the heated water discharged in the bathtub is biased to one side of both side walls facing each other in the width direction of the bathtub, the temperature difference generated in the bathtub water in the entire bathtub becomes larger.

  In order to solve such a problem, in the circulation device for bathtubs described in Patent Literature 1, it is conceivable to open both hot water passages directly below the circulation device for bathtubs. However, in this case, part of the heated water discharged from one of the hot water passages into the bathtub is sucked into the other hot water passage and returns to the circulating water heater side, so There is a problem that the temperature does not rise efficiently. This is because when heated water is discharged from one of the hot water passages into the bathtub, the valve port in the other hot water passage is closed by a floating ball. This is because a state occurs in which the valve opening is not reliably closed. For this reason, it was difficult to suppress the temperature difference which arises in the bathtub water of the whole inside of a bathtub, and to raise the temperature of bathtub water efficiently.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose of this is for a non-polar type bathtub that can make it difficult for temperature differences to occur in the bathtub water throughout the bathtub, and that can efficiently increase the temperature of the bathtub water. The purpose is to provide a circulating device.

In order to achieve the above object, the first aspect of the invention according to claim 1 is a first connection portion and a second connection to which an outward or return path of bathtub water provided between a circulating hot water supply device outside the bathtub is connected. A first suction port and a second suction port for the circulating water heater to suck in the bathtub water in the bathtub through the first connection unit or the second connection unit, and the first connection unit or the second connection. The circulating water heater is provided on a flow path that connects the first discharge port and the second discharge port for discharging bathtub water into the bathtub, and the first connection portion and the first discharge port through the section. A discharge-side first check valve that permits the flow of bathtub water from the first connection portion side to the first discharge port side and restricts the flow in the opposite direction; the second connection portion; and the second discharge portion. Provided on the flow path communicating with the outlet, and allows the flow of bathtub water from the second connection portion side toward the second discharge port side A discharge-side second check valve that restricts the flow in the reverse direction of the water, and allows the flow of bathtub water from the first suction port toward the first connection portion and restricts the flow in the reverse direction, and In the circulator for bathtubs configured to allow the flow of bathtub water from the second suction port to the second connection part and to restrict the flow in the reverse direction, the discharge side first and second check The valve is a ball type check valve having a ball whose specific gravity is greater than that of water as a valve body, and the ball is opened and closed in the vertical direction so that the inside of the valve body housing portion of the both check valves When the ball rises and comes into contact with the valve seat, the flow of the bath water is restricted, and the first discharge port and the second discharge port are connected to the discharge side of the discharge side first check valve. And a common discharge air in the circulation device main body provided with the discharge side of the discharge side second check valve Characterized in that is opened toward substantially beneath the. Here, “substantially directly below” includes a direction inclined within a range of 30 ° at the maximum from the vertical direction.

According to a second aspect of the present invention, in the first aspect of the present invention, in the circulating tool main body, bath water discharged from the first discharge port and the second discharge port into the discharge space is supplied to the circulator body. It is characterized in that a guide portion is provided that is directed in a direction inclined toward the side wall.

Invention according to claim 3, in the invention described in claim 1 or claim 2, the valve seat and the valve element housing portion of the first and second check valves the discharge side, integral to the circulation device body It is characterized by being formed.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the valve lid body that holds the ball in the valve body housing portion is in a direction orthogonal to the opening / closing operation direction of the ball with respect to the circulation tool body. It is characterized in that it is configured to be assembled from.

According to the present invention, the following effects can be exhibited.
In the first aspect of the present invention, the discharge side first check valve and the discharge side second check valve are both ball type check valves, and the balls are adjacent to each other in a state of opening and closing in the vertical direction. Compared with a check valve using a spring, hair and towel fibers in the bath water are less likely to adversely affect the opening and closing operation of the ball. Accordingly, a part of the bath water discharged from the discharge side first check valve (discharge side second check valve) is not completely closed. The discharge side second check valve (discharge side first check valve) is not completely closed. The temperature of the bathtub water in the bathtub can be increased efficiently because the temperature does not return to the circulating water heater. And since the 1st discharge port and the 2nd discharge port are opening toward the circulator for bathtubs substantially right below, the bathtub water supplied to the circulator for bathtubs from the circulation type water heater is from the circulator for bathtubs. It is discharged toward the bottom of the bathtub. Therefore, in the bathtub water in the bathtub, the temperature difference generated in the vertical direction is suppressed, and the temperature of the entire bathtub water in the bathtub rises in a more uniform state.

  In invention of Claim 2, since all the bathtub water discharged from the 1st discharge port or the 2nd discharge port is discharged in the bathtub from the same discharge port, the effect of Claim 1 is more. Become prominent.

  In the invention according to claim 3, the circulation device for bathtubs converts the bath water discharged from the discharge side first check valve or the discharge side second check valve into the discharge space by the guide portion provided in the discharge space. Since it guided so that it might face in the direction inclined to the side wall side of the bathtub which was attached and fixed, the effect of Claim 1 becomes more remarkable.

In the invention according to claim 4, since the valve seat and the valve body housing portion of the discharge side first check valve and the discharge side second check valve are integrally formed in the circulation tool body, the number of parts and the number of assembly steps are reduced. be able to.
In the invention according to claim 5, the assembly of the discharge side first check valve and the discharge side second check valve is facilitated.

Next, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the tub circulating tool 10 of the present embodiment is fixed to a through hole 12 a provided at the center position on one of both side walls 12 facing each other in the longitudinal direction of the tub 11. . The bathtub circulation device 10 is connected to the outside of the bathtub 11 via a hot water supply pipe 14 as an outward path for supplying heated water to the bathtub 11 and a return pipe 15 as a return path for sucking bathtub water from the bathtub 11. A provided forced circulation hot water supply machine 13 (hereinafter referred to as a hot water supply machine) is connected.

  As shown in FIG. 1, the circulator 10 for a bathtub includes a sleeve 16 inserted into the through hole 12 a of the side wall 12 from the inside of the bathtub 11, a rear case 17 disposed on the outside of the side wall 12, and the sleeve A circulation device main body 18 inserted and fixed to the circulation device 16 and a filter 19 attached to the circulation device main body 18 are provided.

  As shown in FIG. 4, the rear case 17 is made of metal, and the rear end portion (the right end portion in FIGS. 1 and 4) has a first connection portion 20 to which the hot water supply pipe 14 and the return pipe 15 are connected, and A second connection portion 21 is provided. The first connection portion 20 is communicated with an inner chamber 22 provided in the center portion of the rear case 17, and the second connection portion 21 is communicated with an outer chamber 23 provided on the outer peripheral portion of the rear case 17. An O-ring 24 is attached to a circumferential groove provided in the inner periphery of the opening of the inner chamber 22. An internal thread portion 25 is provided on the inner peripheral surface of the opening of the rear case 17. A flange portion 26 is provided at an opening end portion of the rear case 17, and the flange portion 26 is covered with a seal member 27 for ensuring watertightness with the outer surface of the side wall 12. The bathtub circulation device 10 of the present embodiment is a so-called nonpolar type, and may connect the hot water supply pipe 14 to the first connection portion 20 and connect the return pipe 15 to the second connection portion 21. On the contrary, it has a structure that can be used even when the hot water supply pipe 14 is connected to the second connection portion 21 and the return pipe 15 is connected to the first connection portion 20.

  As shown in FIGS. 1 and 4, the sleeve 16 is formed in a substantially cylindrical shape by a synthetic resin such as polyacetal, and a flange 28 projects from one end thereof. A male screw portion 29 is provided on the outer peripheral surface of the sleeve 16, and the male screw portion 29 is screwed into the female screw portion 25 of the rear case 17 through the through hole 12 a of the side wall 12. Thus, the rear case 17 and the sleeve 16 are connected to each other with the side wall 12 interposed therebetween, and are supported by the through hole 12a. A plurality of positioning protrusions 30 extending in the axial direction are provided on the inner peripheral surface of the sleeve 16. An engagement circumferential groove 31 (shown in FIG. 1) is recessed in the outer peripheral surface of the flange 28. A packing 32 is sandwiched between the flange 28 and the inner surface of the side wall 12 to ensure watertightness between them.

  As shown in FIGS. 1 and 4, the circulation device main body 18 is formed in a substantially cylindrical shape from a synthetic resin such as polyacetal, and a slip prevention claw 33 (shown in FIG. 4) is provided on the inner peripheral surface of the inner end portion thereof. It protrudes and is engaged with the circumferential groove 31 for engagement of the sleeve 16. As shown in FIGS. 5 and 6, a first water passage 34 communicating with the inner chamber 22 of the rear case 17 is provided at the center of the circulation tool body 18, and the outer periphery of the rear case 17 is provided around the first water passage 34. A second water passage 35 (illustrated in FIG. 5) communicating with the chamber 23 is provided. A partition wall 36 that divides both the passages 34 and 35 is provided between the first water passage 34 and the second water passage 35. Further, a positioning engagement portion 37 (shown in FIG. 6) is provided at the rear portion of the circulation device main body 18 and engages with the positioning protrusion 30 of the sleeve 16 to rotate the circulation device body 18 in the circumferential direction. It is regulated. Further, as shown in FIGS. 5 and 6, a discharge passage forming portion 38 through which the first water passage 34 and the second water passage 35 communicate is provided in the lower part on the front side of the circulation tool body 18. Between the first water passage 34 and the second water passage 35 and the discharge passage forming portion 38, a valve seat 39 for constituting a discharge side first check valve 47 and a discharge side second check valve 48 which will be described later. And the valve body accommodating part 40 (illustrated in FIG. 5) is integrally formed in the circulation tool main body 18. As shown in FIGS. 7 and 8A and 8B, the valve seat 39 has a circular valve port 39a on the discharge passage forming portion 38 side. The valve body accommodating portion 40 is opened on the discharge passage forming portion 38 side.

  Further, as shown in FIG. 5, a pair of suction portions 41 and 42 for sucking the bath water in the bathtub 11 through the filter 19 are recessed in the front side of the circulating tool body 18. As shown in FIG. 12, the suction portion 41 is communicated with the first water passage 34 via the suction-side first check valve 43. As shown in FIGS. 11A and 11B, the suction-side first check valve 43 includes a base portion 44 supported on the front surface of the circulation tool main body 18 and a valve plate 45 extending rearward from the lower surface thereof. Thus, the flow of the bath water from the suction portion 41 toward the first water passage 34 is allowed and the flow in the opposite direction is restricted. The suction portion 42 is communicated with the second water passage 35 via a suction-side second check valve 46. The suction-side second check valve 46 has the same configuration as the suction-side first check valve 43, and allows the bathtub water to flow from the suction portion 42 to the second water passage 35 and flows in the opposite direction. Is to regulate. Both check valves 43 and 46 are integrally formed of a synthetic rubber such as ethylene-propylene-diene copolymer rubber (EPDM).

  As shown in FIG. 12, a discharge-side first check valve 47 is provided between the first water passage 34 and the discharge passage forming portion 38, and the first water passage 34 to the discharge passage forming portion 38. The flow of bathtub water is allowed and the flow in the opposite direction is restricted. A discharge-side second check valve 48 is provided between the second water passage 35 and the discharge passage forming portion 38 to allow the bath water to flow from the second water passage 35 toward the discharge passage forming portion 38. At the same time, the flow in the opposite direction is regulated. As shown in FIGS. 13A and 13B, the discharge-side first check valve 47 includes the valve seat 39, the valve body housing portion 40, and a valve lid disposed on the opening side of the valve body housing portion 40. It comprises a body 49 and a ball 50 as a valve body housed in the valve body housing part 40. The balls 50 are integrally formed of a synthetic rubber such as ethylene-propylene-diene copolymer rubber or a synthetic resin such as polyacetal having a specific gravity slightly higher than that of water. The discharge side second check valve 48 is configured in the same manner as the discharge side first check valve 47. As shown in FIGS. 13A to 13C, the valve lid body 49 includes a frame body 49a in which two frames are integrated, and a locking piece 49b that protrudes inward for each frame. The ball 50 is held in the valve body accommodating portion 40. The valve lid 49 has an arrow H (see FIG. 5) with respect to the recess 18a (shown in FIGS. 5, 12, and 13C) provided in the circulation device main body 18 after the ball 50 is inserted into the valve body housing 40. 13 (c), it is assembled in the circulation tool main body 18 by being fitted in the direction. That is, the valve lid body 49 is assembled to the circulation device main body 18 from a direction orthogonal to the opening / closing operation direction of the ball 50.

  As shown in FIGS. 13A and 13C, in the state where the ball 50 is locked to the valve lid body 49 in each check valve 47, 48, a flow path is provided between the ball 50 and the valve lid body 49. Is formed, and the check valves 47 and 48 are opened. The circulator 10 for the bathtub is installed in the bathtub 11 so that the valve seat 39 is horizontally disposed above the ball 50 in both the check valves 47 and 48, and the opening / closing operation direction of the ball 50 is vertical. The And when the bathtub water is supplied to the 1st water flow path 34 through the 1st connection part 20, the discharge side 1st non-return valve 47 is supplied to the 1st water flow path 34, as shown to Fig.13 (a). The ball 50 is held in contact with the valve lid body 49 due to the pressure of the bath water, thus allowing the bath water to flow from the first water passage 34 toward the discharge passage formation portion 38. On the other hand, when the bathtub water is sucked from the first water passage 34 through the first connection portion 20, the discharge-side first check valve 47, as shown in FIG. 13 (b), the bathtub in the first water passage 34. Due to the difference between the pressure of the water and the pressure of the bath water in the discharge passage forming portion 38 higher than that, the ball 50 is raised and held at a position where it abuts the valve seat 39. The discharge-side first check valve 47 restricts the flow of bathtub water from the discharge passage forming portion 38 toward the first water passage 34. Similarly, the discharge-side second check valve 48 is configured such that when bathtub water is supplied to the second water passage 35 through the second connection portion 21, the bathtub water heading from the second water passage 35 toward the discharge passage forming portion 38. The flow is allowed, and when the bathtub water is sucked from the second water passage 35 through the second connection portion 21, the flow of the bathtub water from the discharge passage forming portion 38 toward the second water passage 35 is restricted.

  As shown in FIG. 1, a cover 51 shown in FIGS. 9A and 9B is attached and fixed to the front surface side of the circulation device main body 18, and the first water passage 34 and the second water passage 35 are secured by the cover 51. The suction parts 41 and 42 and the discharge passage forming part 38 are partitioned from the outside. Further, the check valves 43 and 46 and the valve lid body 49 are fixed to the circulation device main body 18 by the contact of the cover 51. As shown in FIG. 9A, the cover 51 has a pair of suction holes for sucking bath water into the suction portions 41 and 42 through the filter 19 at positions corresponding to the suction portions 41 and 42. 52 and 53 are transparently provided. Further, as shown in FIG. 9B, a guide portion 54 that protrudes larger toward the lower end side of the cover 51 is provided at a position corresponding to the discharge passage forming portion 38 in the cover 51. 4 and 13 (a) and 13 (b), the cover 51 allows the discharge side of the discharge side first check valve 47 and the discharge side of the discharge side second check valve 48 to be separated. An opening discharge space 55 is formed in the discharge passage forming portion 38. Furthermore, the guide part 54 is the side wall in which the circulator 10 for bathtubs was provided from the direction which went directly under the circulator 10 for bathtubs in the direction of the bath water discharged from the check valves 47 and 48 to the discharge space 55. The guide is guided in a direction inclined to the 12 side.

  As shown in FIGS. 1 and 4, the filter 19 is sandwiched between a bottomed cylindrical filter base 56, a filter cover 57 covering the filter base 56, and the filter base 56 and the filter cover 57. It comprises a wire mesh 58 as a filter. As shown in FIG. 10, the filter base 56 is integrally formed of a synthetic resin such as polyacetal, and a circular inner ridge 59 and an outer ridge 60 that encloses the inner ridge 59 are formed on the front surface of the bottom wall. It is integrally formed so as to have the same center. On the bottom wall of the filter base 56, a substantially fan-shaped suction port 61 is formed between the inner ridge 59 and the outer ridge 60 in a state of being arranged in a plurality of annular shapes. An inner surface of the bottom wall of the filter base 56 is provided with a ridge 62 that contacts the front surface of the cover 51 between the suction holes 52 and 53. Further, a discharge port 63 disposed at a position corresponding to an opening on the outer peripheral surface of the circulation tool main body 18 of the discharge passage forming portion 38 is provided on the peripheral wall of the filter base 56. As shown in FIG. 1, the filter cover 57 is press-molded from a stainless steel plate, and a plurality of substantially fan-like suction ports 64 are formed in a row on the bottom wall. Each suction port 64 is provided so as to correspond to each suction port 61 of the filter base 56. Further, as shown in FIGS. 4 and 13A and 13B, the peripheral wall of the filter cover 57 is provided with a discharge port 65 arranged at a position corresponding to the discharge port 63 of the filter base 56. . The wire mesh 58 is made of stainless steel and is formed to have substantially the same diameter as the outer ridge 60, and closes the annular area surrounded by the ridges 59, 60 and the suction ports 64 on the front surface of the filter base 56. As described above, the filter base 56 and the filter cover 57 are sandwiched. In the filter 19, an engagement protrusion (not shown) provided on the inner peripheral surface of the filter base 56 is engaged with an engagement recess 66 (shown in FIG. 1) provided on the outer peripheral surface of the circulation tool main body 18. It is fixedly attached to the circulation device main body 18 with a predetermined rotational position relationship. At this time, the protrusion 62 of the filter base 56 contacts the front surface of the cover 51 of the circulating tool main body 18. That is, as shown in FIGS. 13A and 13B, the suction holes 52 and 53 and the suction ports 61 communicate with each other between the front surface of the circulation tool body 18 and the rear surface of the filter base 56. A passage 67 is formed. Further, between the filter base 56 and the filter cover 57, an annular suction passage 68 that connects each suction port 61 and each suction port 64 is formed. In the present embodiment, the suction portion 41, the suction hole 52, the suction passage 67, the suction port 61, the suction passage 68, and the suction port 64 constitute a first suction port, and the suction portion 42, the suction hole 53, the suction passage 67, and the suction port. The port 61, the suction passage 68, and the suction port 64 constitute a second suction port. In addition, the discharge ports 63 and 65 constitute a first discharge port and a second discharge port. The filter 19 is configured so that the discharge port 65 faces directly downward with respect to the circulation device main body 18 attached and fixed to the bathtub 11 so that the opening / closing operation direction of the ball 50 in each of the check valves 47 and 48 is vertical. And fixed.

  Now, when using the bath circulator 10 attached and fixed to the side wall 12 of the bathtub 11, for example, the hot water supply pipe 14 is connected to the first connection part 20, and the return pipe 15 is connected to the second connection part 21. To do. Then, when the water heater 13 is operated, the bath water is sucked from the second water passage 35 through the second connection portion 21 and the outer chamber 23, whereby the suction side second check valve 46 is opened and the discharge side first 2 Check valve 48 closes. For this reason, the bathtub water in the bathtub 11 flows from the suction port 64 on the front surface of the filter 19 to the suction passage 68, each suction port 61, the suction passage 67, the suction hole 53 of the cover 51, the suction portion 42, and the suction side second check. The water is sucked into the return pipe 15 through the valve 46, the second water passage 35, the outer chamber 23, and the second connection portion 21, and returned to the water heater 13. On the other hand, the bathtub water heated by the water heater 13 is supplied from the hot water supply pipe 14 to the first water passage 34 via the first connection portion 20 and the inner chamber 22, and thereby the suction-side first check valve 43 is opened. At the same time, the discharge side first check valve 47 is opened. For this reason, the heated water supplied from the water heater 13 through the hot water supply pipe 14 is the first connection portion 20, the inner chamber 22, the first water passage 34, the discharge-side first check valve 47, and the discharge passage formation portion 38. Then, it is discharged into the bathtub 11 through the discharge ports 63 and 65.

  Moreover, when the water heater 13 is operated in a state where the hot water pipe 14 is connected to the second connecting portion 21 and the return pipe 15 is connected to the first connecting portion 20, the tub circulating tool 10 is opposite to the above. Bath water is sucked from the first water passage 34 through the first connection portion 20 and the inner chamber 22, whereby the discharge side first check valve 47 is closed and the suction side first check valve 43 is opened. For this reason, the bathtub water in the bathtub 11 flows from the suction port 64 on the front surface of the filter 19 to the suction passage 68, each suction port 61, the suction passage 67, the suction hole 52 of the cover 51, the suction portion 41, and the suction side first check. The water is sucked into the return pipe 15 through the valve 43, the first water passage 34, the inner chamber 22, and the first connection portion 20, and is returned to the water heater 13. On the other hand, the bath water heated by the hot water heater 13 is supplied from the hot water supply pipe 14 to the second water passage 35 via the second connection portion 21 and the outer chamber 23, whereby the suction side second check valve 46 is opened. At the same time as closing, the discharge-side second check valve 48 opens. For this reason, the heated water supplied from the water heater 13 through the hot water supply pipe 14 is supplied to the second connecting portion 21, the outer chamber 23, the second water passage 35, the discharge-side second check valve 48, and the discharge passage forming portion 38. Then, it is discharged into the bathtub 11 through the discharge ports 63 and 65.

The embodiment described above in detail has the following effects.
(1) Since the discharge side first check valve 47 and the discharge side second check valve 48 are both ball type check valves and the ball 50 is configured to open and close in the vertical direction, a spring is used. Compared with the check valve, the hair and towel fibers in the bath water hardly affect the opening and closing operation of the ball 50. For this reason, when the bathtub water is discharged from the discharge side first check valve 47 to the discharge passage forming portion 38, the discharge side second check valve 48 is securely closed, and from the discharge side second check valve 48, When bathtub water is discharged into the discharge passage forming portion 38, the discharge-side first check valve 47 is reliably closed. Therefore, even if the discharge side first check valve 47 and the discharge side second check valve 48 are provided on both sides of the partition wall, the discharge side first check valve 47 (discharge side second check valve 48) discharges from the discharge passage. A portion of the bath water discharged to the forming unit 38 does not return to the water heater 13 through the discharge-side second check valve 48 (discharge-side first check valve 47) that is not completely closed. Therefore, the temperature of the bathtub water in the bathtub 11 can be raised efficiently.

  (2) Since the discharge ports 63 and 65 are opened so as to face directly below the bathtub circulation device 10, the bathtub water supplied from the water heater 13 to the bathtub circulation device 10 is transferred from the bathtub circulation device 10 to the bathtub. 11 is discharged downward. Further, in the discharge passage forming portion 38, the direction of the bath water discharged from the discharge passage forming portion 38 to the bathtub 11 through the discharge ports 63 and 65 is directed to the side wall 12 to which the bathtub circulation device 10 is attached and fixed. A guiding part 54 for guiding is provided. Bath water discharged into the bathtub 11 from the discharge ports 63 and 65 of the circulator 10 for the bathtub is discharged in a direction inclined toward the side wall 12 from directly below the discharge ports 63 and 65. Is done. For this reason, the heated water supplied from the water heater 13 to the tub circulating tool 10 moves in the longitudinal direction of the bathtub 11 along the bottom surface from the side wall 12 of the bathtub 11, so that the temperature on the bottom side of the bathtub 11 is lower. Efficiently mixes with the entire bathtub water. Therefore, in the bathtub water in the bathtub 11, the temperature difference which generate | occur | produces in an up-down direction is suppressed, and the temperature of the whole bathtub water in a bathtub rises in a more uniform state.

  (3) The discharge side of the discharge-side first check valve 47 and the discharge side of the discharge-side second check valve 48 are opened in a discharge space 55 provided inside the circulation device main body 18, and a common discharge port 63, 65. For this reason, regardless of the combination between the hot water supply pipe 14 and the return pipe 15 and the first connection part 20 and the second connection part 21, from the discharge side first check valve 47 or the discharge side second check valve 48, The discharged heated water is discharged into the bathtub 11 from the discharge ports 63 and 65 located immediately below the bathtub circulation device 10. Therefore, the effect described in the above (2) becomes more remarkable.

  (4) The bathtub circulation device 10 fixes the bathtub water discharged from the discharge side first check valve 47 or the discharge side second check valve 48 to the discharge space 55 by the guide portion 54 provided on the cover 51. The bathtub 11 was guided in a direction inclined toward the side wall 12 side. For this reason, the heated water discharged into the bathtub 11 from the discharge ports 63 and 65 of the tub circulating tool 10 moves downward along the inner surface of the side wall 12, and reaches the arc portion between the inner surface of the side wall 12 and the bottom surface. After the direction is smoothly changed, the water is mixed with the bath water on the bottom side while moving in the longitudinal direction of the bathtub 11 along the bottom surface. On the other hand, when the heated water is discharged from the discharge ports 63 and 65 of the circulator 10 for bathtubs directly downward, the heated water reaches the bottom surface at a right angle without changing the direction, and a part thereof is It does not move in the longitudinal direction of the bathtub 11 along the bottom surface, but moves above the bathtub water in the bathtub 11. Therefore, according to this embodiment, the effect described in the above (2) becomes more remarkable.

  (5) The valve seat 39 and the valve body accommodating portion 40 of the discharge-side first check valve 47 and the discharge-side second check valve 48 are formed integrally with the circulation device main body 18. On the other hand, when the check valves 47 and 48 configured independently of the circulation tool body 18 are assembled to the circulation tool body 18, the check valves 47 and 48 disposed in the flow path of the circulation tool body 18. It is necessary to provide a sealing member such as an O-ring between the inner surface of the flow path and the inner surface of the flow path, which increases the number of parts and the number of assembly steps. Therefore, in this embodiment, the number of parts and the number of assembly steps can be reduced.

  (6) For the valve seat 39 and the valve body housing portion 40 formed integrally with the circulation device main body 18, the valve lid body closes the opening of the valve body housing portion 40 after the ball 50 is inserted into the valve body housing portion 40. The discharge-side first check valve 47 and the discharge-side second check valve 48 are configured simply by assembling 49 into the recess 18a of the circulation tool body 18. Therefore, assembly becomes easy.

In addition, this embodiment can also be changed and embodied as follows.
The discharge space 55 is not provided, and the discharge side of the discharge side first check valve 47 and the discharge side of the discharge side second check valve 48 are connected to a pair of discharge ports provided on the peripheral wall of the filter 19. It is good also as a structure connected in the mutually independent state.

The suction passages 67 and 68 may be omitted, and the suction portions 41 and 42 may be configured to communicate with a pair of suction ports provided on the front surface of the filter 19 in an independent state.
The circulator main body 18 is attached and fixed to the bathtub 11 so that the opening / closing operation direction of the ball 50 in both the check valves 47 and 48 is tilted within a range from the vertical direction to a maximum of 30 °, and the discharge port 65 is It is good also as a structure attached and fixed to the circulation tool main body 18 so that it may face the direction inclined within the range to 30 degrees at a maximum from a perpendicular direction. Even if it is such a structure, the effect of Claim 1 can be acquired. However, the effect is remarkable if the opening / closing operation direction of the ball 50 and the direction of the discharge port 65 are both inclined within a range from the vertical direction to a maximum of 15 °.

The technical idea that can be grasped from each of the embodiments will be described below.
(1) Before Symbol tub circulation device, characterized in that is tilted in a range of up to 15 ° from beneath the first discharge port and a second discharge port. According to such a structure, the effect of Claim 1 becomes remarkable.

The disassembled perspective view which shows the circulation tool for bathtubs of one Embodiment. The perspective view which shows the bathtub in which the circulation tool for bathtubs was attached and fixed. The side view which shows a bathtub and a circulating water heater. The longitudinal cross-sectional view which shows the circulation tool for bathtubs. The front view which shows the circulation tool main body. FIG. 6 is a longitudinal sectional view taken along line AA in FIG. 5. BB sectional drawing in FIG. (A) is CC sectional view taken on the line in FIG. 5, (b) is DD sectional drawing similarly. (A) is a front view which shows a cover, (b) is the EE sectional view taken on the line in (a). (A) is a front view which shows a filter base, (b) is the FF sectional view taken on the line in (a). (A) is a longitudinal cross-sectional view which shows a suction side 1st check valve, (b) is a longitudinal cross-sectional view which shows the operation state. The front view which shows the circulation tool main body of the state which removed the cover. (A) is a longitudinal cross-sectional view which shows a discharge side 1st check valve, (b) is a longitudinal cross-sectional view which shows the operation state, (c) is a GG sectional view taken on the line in (a).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Circulation tool for bathtubs, 11 ... Bathtub, 12 ... Side wall, 13 ... Circulating hot water supply machine, 14 ... Hot water supply pipe as an outward path, 15 ... Return pipe as a return path, 18 ... Circulation tool main body, 20 ... 1st connection part 21 ... 2nd connection part, 39 ... Valve seat, 40 ... Valve body accommodating part, 41 ... Suction part which comprises 1st suction port, 42 ... Suction part which comprises 2nd suction port, 47 ... Discharge side 1st Non-return valve, 48 ... discharge-side second non-return valve, 49 ... valve lid, 50 ... ball, 52 ... suction hole constituting the first suction port, 53 ... suction hole constituting the second suction port, 54 ... Guide portion, 55 ... discharge space, 61 ... suction port constituting first suction port and second suction port, 63, 65 ... discharge port as first discharge port and second discharge port, 64 ... first suction port and A suction port constituting the second suction port, 67 ... same suction passage, 68 ... same suction passage.

Claims (4)

The first connection part and the second connection part to which the forward or return path of the bath water provided between the circulation hot water heater outside the bathtub is connected, and the circulation type via the first connection part or the second connection part The circulating water heater discharges bathtub water into the bathtub through the first and second inlets and the first or second connection port for the water heater to suck in the bathtub water in the bathtub. A first discharge port and a second discharge port,
Provided on a flow path that communicates the first connection portion and the first discharge port, and allows the flow of bathtub water from the first connection portion side toward the first discharge port side and restricts the flow in the opposite direction. A discharge-side first check valve that
Provided on a flow path that communicates the second connection portion and the second discharge port, and allows the flow of bath water from the second connection portion side toward the second discharge port side and restricts the flow in the opposite direction. A discharge-side second check valve that
The flow of bath water from the first suction port to the first connection portion is allowed and the flow in the opposite direction is restricted, and the flow of bath water from the second suction port to the second connection portion is allowed to flow. In the circulator for bathtubs configured to allow and restrict the flow in the opposite direction,
Wherein the first and second check valve outlet side, the check valve of the ball type and valve ball having a larger specific gravity than water, the ball of the same two check valves and opening and closing in the vertical direction, the together configured to regulate the flow of the bath water when the valve body accommodating portion of Ryogyakutomeben said ball abuts the valve seat to rise, the first discharge port and a second discharge port, wherein A discharge side of the first check valve on the discharge side and a discharge side of the second check valve on the discharge side are opened to a common discharge space in the circulation device main body provided substantially downward. Circulator for bathtub. The circulation device main body is provided with a guide portion for directing bathtub water discharged from the first discharge port and the second discharge port into the discharge space in a direction inclined toward the side wall of the bathtub. The bathtub circulation device according to claim 1. The circulator for a bathtub according to claim 1 or 2, wherein the valve seat and the valve body accommodating portion of the discharge side first and second check valves are formed integrally with a circulator main body. . A valve lid for holding the ball valve receptacle with respect to the circulating tool body, according to 請 Motomeko 3 you characterized by being configured as assembled from a direction perpendicular to the opening and closing operation direction of the ball Tub circulator .

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