JP2006226607A - Circulation tool for bathtub - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulation tool for a bathtub capable of making water easily enter into a pipe when filling water in the bathtub, and capable of restraining hot water from being sucked to the water heater side when reheating bathtub water. <P>SOLUTION: A ball type discharge side check valve 47 equipped with a ball 50, and vertically opened and closed is provided in this circulation tool for a bathtub so that it is located in the circulation passage of bathtub water. The ball 50 of the discharge side check valve 47 is made of a material having specific gravity larger than that of water. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a circulator for a bathtub fixed to a side wall of a bathtub and connected to a circulating water heater provided outside the bathtub via a circulating hot water supply pipe and a return pipe, and in particular, bathtub water. The circulator for bathtubs which provided the discharge side non-return valve in the circulation flow path.

Conventionally, as this kind of circulator for bathtubs, the thing of a structure which is disclosed by patent document 1 and patent document 2, for example is known. That is, in the circulator for bathtub described in Patent Document 1, a ball-type discharge-side check valve is provided in the circulation flow path of the bath water, and the ball of the discharge-side check valve is from a floating ball that is lighter than water. It is configured. Moreover, in the circulation device for bathtubs described in Patent Document 2, an opening / closing plate type discharge-side check valve is provided in the circulation flow path of the bath water, and the opening / closing plate of the discharge-side check valve has many fine holes. And slits are formed.
Japanese Patent Laid-Open No. 10-325614 (pages 6 to 7, FIGS. 19 to 24) Japanese Patent Laid-Open No. 2001-194010 (page 8, FIGS. 13 to 14)

  By the way, when reheating the bathtub water stored in the bathtub, the bathtub water is transported from the bathtub to the water heater through the return pipe by the pump provided in the circulating water heater, and after heating. The bathtub water is conveyed from the water heater to the bathtub through the hot water pipe. In this case, since the air stays in the pipe at the start of reheating the bath water, the air in the pipe is sucked into the pump until the bath water in the bathtub reaches the water heater, There was a risk that an excessive load was applied to the pump. In order to suppress such a problem, it is preferable that a large amount of water naturally flows into the pipe when water is stored in the bathtub. However, in the bathtub circulation device described in Patent Document 1, the floating ball of the discharge-side check valve is formed of a material that is lighter than water. Therefore, when water accumulates in the bathtub, the floating ball floats up. As a result, the check valve is closed, and there is a possibility that the inflow of water into the pipe is prevented.

  On the other hand, in the circulation device for bathtubs described in Patent Document 2, since many fine holes and slits are formed in the opening / closing plate of the discharge-side check valve, the bathtub water is discharged when the bathtub water in the bathtub is discharged. The accumulated water in the circulating device can be discharged from the hole or slit of the opening / closing plate. For this reason, it is possible to prevent the possibility that water stays in the circulation device for bathtubs and causes the generation of bacteria. However, when the bath water is replenished, the heated hot water that has flowed into the bathtub from the water heater is sucked into the water heater through the holes and slits of the opening / closing plate, so that it is possible to accurately detect the temperature during reheating. There was a risk that temperature control could be hindered.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose of this is to allow water to easily enter the pipe when water is stored in the bathtub, and when reheating the bathtub water, the heated hot water is sucked into the water heater. It is providing the circulation tool for bathtubs which can be suppressed.

  In order to achieve the above object, the invention described in claim 1 is directed to a circulating water heater fixed to a side wall of a bathtub and provided outside the bathtub via a circulating hot water supply pipe and a return pipe. The circulator body connected to the tub is provided with a ball that is opened and closed in a substantially vertical direction so that the circulator body is positioned in a circulation flow path of the bath water between the bathtub and the circulating water heater. A ball-type discharge-side check valve is provided, and the ball of the discharge-side check valve is formed of a material having a specific gravity greater than that of water.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the discharge-side check valve is in a state of opening the circulation flow path in a state where bathtub water is not accumulated in the bathtub. To do.

  Invention of Claim 3 is the 1st connection part and 2nd connection part which are connected to the outward path or return path of the bath water provided between the circulation type water heaters outside the bathtub, and the 1st or 2nd The circulating water heater is connected to the inside of the bathtub via the first connecting portion or the second connecting portion, and the first inlet or the second inlet for the circulating water heater to suck in the bathtub water in the bathtub through the connecting portion. A first discharge port and a second discharge port for discharging bath water to the first flow port, and a first discharge port from the first connection portion side provided on a flow path communicating the first connection portion and the first discharge port. A first check valve that permits the flow of bathtub water toward the side and restricts the flow in the opposite direction; and a flow path that communicates the second connection portion and the second discharge port. A second check valve that allows the bathtub water to flow from the connecting portion side to the second discharge port side and restricts the flow in the opposite direction. A bathtub that allows the bath water to flow from the first suction port to the first connection portion, restricts the flow in the opposite direction, and also travels from the second suction port to the second connection portion. In a bathtub circulator configured to allow flow of water and restrict flow in the opposite direction, the first and second check valves are ball check valves, and the ball check valves are It is made of a material having a specific gravity greater than that of water.

  The invention according to claim 4 is the invention according to claim 1, wherein the check valve opens the first discharge port and the second discharge port in a state in which the bath water does not accumulate in the bath. It is characterized by.

The invention according to claim 5 is the invention according to claim 3 or 4, wherein the ball of the ball type check valve is free.
(Function)
According to the first aspect of the present invention, since the valve body of the discharge-side check valve is formed of a material having a specific gravity greater than that of water, when the water is accumulated in the bathtub, the valve body rises and the check valve is closed. The water can be easily infiltrated into the piping. Therefore, when the bath water starts to be replenished, it is possible to prevent the air staying in the pipe from being sucked into the pump of the circulation type hot water supply machine and causing a load on the pump. In addition, when the bath water is replenished, the discharge-side check valve is closed, and the heated hot water flowing into the bathtub from the water heater can be prevented from being sucked into the water heater. Therefore, temperature detection at the time of reheating can be accurately performed, and temperature control can be accurately performed.

  In Claim 2, when discharging the bathtub water in a bathtub, a discharge side non-return valve will be in an open state, and the accumulated water in the circulation tool for bathtubs can be discharged | emitted reliably. Therefore, it is possible to prevent the possibility that water stays in the circulator for bathtubs and causes the generation of bacteria.

  In addition to the effect | action of Claim 1, in invention of Claim 3, bath water can be flowed in the forward / reverse direction in the circulation device for bathtubs, directionality is lost, and assembly is easy Since the check valve is a ball check valve, the opening / closing operation is smooth.

In the invention of the fourth aspect, the same effect as that of the second aspect can be obtained.
In the invention according to claim 5, since the ball is free, a smoother opening / closing operation can be obtained.

  As described above, according to the present invention, when water is accumulated in the bathtub, it is possible to easily infiltrate the water into the pipe. In addition, when the bath water is replenished, the heated hot water can be prevented from being sucked into the hot water supply side.

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

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

  As shown in FIGS. 1 and 4, the rear case 17 is made of metal, and a first end for connecting the hot water supply pipe 14 and the return pipe 15 to the rear end (the right end in FIGS. 1 and 4). A connection part 20 and a second connection part 21 are 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.

  In addition, the circulation device 10 for bathtubs of this embodiment is what is called a nonpolar type, Comprising: While connecting the hot water supply pipe 14 to the 1st connection part 20 side, and connecting the return pipe 15 to the 2nd connection part 21 side Alternatively, the hot water supply pipe 14 is connected to the second connecting portion 21 side, and the return pipe 15 is connected to the first connecting portion 20 side, so that the structure can be used.

  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 supported by the through hole 12a. A plurality of positioning projections 30 are provided on the inner peripheral surface of the sleeve 16 so as to extend in the axial direction. An engagement circumferential groove 31 (shown in FIG. 1) is recessed in the outer peripheral surface of the flange 28. A packing 32 is secured between the flange 28 and the inner surface of the side wall 12 to ensure water tightness between them.

  As shown in FIGS. 1 and 4 to 6, the circulation device main body 18 is formed in a substantially cylindrical shape by a synthetic resin such as polyacetal. On the inner peripheral surface of the inner end portion of the circulation tool main body 18, a removal preventing claw 33 is projected so as to be engaged with the engagement peripheral groove 31 of the sleeve 16. A first water passage 34 that communicates with the inner chamber 22 of the rear case 17 is provided at the center of the circulation device body 18, and a second water passage 35 that communicates with the outer chamber 23 of the rear case 17 is provided around the first water passage 34. (Shown in FIG. 5) 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.

  As shown in FIGS. 5 and 6, a discharge passage forming portion 38 communicating with the first water passage 34 and the second water passage 35 is provided at the lower part on the front side of the circulating tool body 18. Between the 1st water flow path 34 and the 2nd water flow path 35, and the discharge channel | path formation part 38, the circulation tool main body 18 comprises the discharge side 1st check valve 47 and the discharge side 2nd check valve 48 which are mentioned later. A valve seat 39 and a valve body accommodating portion 40 are integrally formed. 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 toward the discharge passage forming portion 38 side.

  As shown in FIGS. 5, 11, and 12, a pair of suction portions 41, 42 for sucking the bathtub water in the bathtub 11 through the filter 19 are recessed in the front side of the circulation tool body 18. ing. One suction portion 41 is communicated with the first water passage 34 via a suction-side first check valve 43. 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. While allowing the flow of bathtub water, the flow in the opposite direction is restricted. The other 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 is configured in the same manner as the suction-side first check valve 43 and allows the bath water to flow from the suction portion 42 to the second water passage 35 and in the opposite direction. The flow is regulated. 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 heads from the first water passage 34 toward the discharge passage forming portion 38. While allowing the flow of bathtub water, 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 the valve lid disposed on the opening side of the valve body housing portion 40. A body 49 and a free ball 50 as a valve body accommodated in the valve body accommodating portion 40, that is, a ball 50 that is opened and closed independently along the vertical direction without being supported by an arm or the like. Yes. Therefore, since this ball 50 is free, it can be smoothly opened and closed without being restrained by other members. The balls 50 are made of synthetic rubber such as ethylene-propylene-diene copolymer rubber or synthetic resin such as polyacetal so that the specific gravity is slightly larger 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 having a structure in which two frame portions are integrated, and a plurality of locking pieces 49b protruding inside each frame portion. The ball 50 is held in the valve body housing portion 40. Further, the valve lid body 49 is fitted in the direction of the arrow H in FIG. 13C with respect to the recess 18a provided in the circulation device main body 18 in a state where the ball 50 is put in the valve body housing portion 40. The circulating device body 18 is assembled. 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. 13 (a) and 13 (c), in the circulator 10 for bathtubs, the valve seats 39 of both check valves 47 and 48 are horizontally disposed above the ball 50, and the opening / closing operation direction of the ball 50 is changed. It is installed in the bathtub 11 so as to be vertical. 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 formed between the ball 50 and the valve lid body 49, and the check valves 47, 48 are It is comprised so that it may be in an open state.

  Then, on the discharge side first check valve 47 side, when bath water is supplied to the first water passage 34 through the first connection portion 20, as shown in FIG. The ball 50 is held in contact with the valve lid 49 by the pressure of the supplied bath water. Thereby, the flow of the bathtub water toward the discharge passage formation part 38 from the 1st water flow path 34 is accept | permitted. On the other hand, when the bathtub water is sucked from the first water passage 34 through the first connection portion 20, as shown in FIG. 13B, the pressure of the bathtub water in the first water passage 34 and the discharge passage higher than that. Due to the difference from the pressure of the bathtub water in the forming portion 38, the ball 50 is raised and held at a position where it contacts the valve seat 39. Thereby, the flow of the bathtub water which goes to the 1st water flow path 34 from the discharge channel | path formation part 38 is controlled.

  Similarly, also on the discharge side second check valve 48 side, the flow of bath water is allowed or restricted in the same manner as the discharge side first check valve 47 side. That is, when the bathtub water is supplied to the second water passage 35 through the second connection portion 21, the bath water flowing from the second water passage 35 toward the discharge passage forming portion 38 is allowed. Further, 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 FIGS. 1, 4, 9 (a) and 9 (b), a cover 51 is attached and fixed to the front side of the circulating tool body 18, and the cover 51 allows the first water passage 34 and the second water passage 34 to be fixed. The water channel 35, both suction portions 41 and 42, and the discharge passage forming portion 38 are covered from the outer surface side. Further, the check valve 43, 46 and the valve lid body 49 are fixed to the circulation device main body 18 by the contact of the cover 51. A pair of suction holes 52, 53 for sucking bath water into the suction portions 41, 42 through the filter 19 are provided at positions corresponding to the suction portions 41, 42 of the cover 51. Further, a guide portion 54 that protrudes more inward toward the lower end side of the cover 51 is provided at a position corresponding to the discharge passage forming portion 38 of the cover 51.

  4 and 13 (a) and 13 (b), the cover 51 causes the discharge side first check valve 47 and the discharge side second check valve to be placed in the discharge passage forming portion 38 by the cover 51. A discharge space 55 for opening the discharge side of 48 is formed. Further, the direction of the bath water discharged from the check valves 47 and 48 to the discharge space 55 by the guide portion 54 is provided from the direction directly below the bath circulator 10 so that the bath circulator 10 is provided. The guide is changed in a direction inclined to the side wall 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 are integrally formed on the front surface of the bottom wall so as to be concentric. Yes. Between the inner ridge 59 and the outer ridge 60, a plurality of substantially fan-shaped suction ports 61 are formed in a circular shape on the bottom wall of the filter base 56. An inner surface of the bottom wall of the filter base 56 is provided with a protrusion 62 that can abut against the front surface of the cover 51 between the suction holes 52 and 53. Further, a discharge port 63 is provided on the peripheral wall of the filter base 56 so as to be disposed corresponding to the discharge passage forming portion 38 of the circulating tool body 18.

  As shown in FIG. 1, the filter cover 57 is press-formed from a stainless steel plate, and a plurality of substantially fan-shaped suction ports 64 are circularly formed on the bottom wall so as to correspond to the suction ports 61 of the filter base 56. It is formed side by side in a ring. 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 to correspond 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 of the filter base 56, and an annular region surrounded by both ridges 59, 60 on the front surface of the filter base 56 and each suction. It is sandwiched between the filter base 56 and the filter cover 57 so as to close the opening 64.

  Further, in the filter 19, an engagement protrusion (not shown) provided on the inner peripheral surface of the filter base 56 engages with an engagement recess 66 (shown in FIG. 1) provided on the outer peripheral surface of the circulation tool body 18. As a result, it is fixedly attached to the circulation device main body 18 in a predetermined rotational position. 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 this 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. Further, the suction portion 42, the suction hole 53, the suction passage 67, the suction port 61, the suction passage 68, and the suction port 64 constitute a second suction port. Further, the discharge ports 63 and 65 constitute a first discharge port and a second discharge port. The filter 19 has the discharge port 65 directed directly downward with respect to the circulation tool 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. In this way, the mounting is 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 to replenish the bathtub water, the bathtub water is sucked from the second water passage 35 via the second connection portion 21 and the outer chamber 23, and thereby the suction side second reverse While the stop valve 46 is opened, the discharge-side second check valve 48 is closed. 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.

  Further, contrary to the above, the water heater 13 is operated with the hot water supply pipe 14 connected to the second connection part 21 and the return pipe 15 connected to the first connection part 20 with respect to the circulation device 10 for the bathtub. When the bath water is replenished, the bath water is sucked from the first water passage 34 via the first connection portion 20 and the inner chamber 22, thereby closing the discharge-side first check valve 47 and sucking the water. The side first check valve 43 opens. 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 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. While 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. And it discharges in the bathtub 11 through the discharge ports 63 and 65.

  Further, in any connection state of the hot water supply pipe 14 and the return pipe 15 with respect to the first connection part 20 and the second connection part 21, the ball 50 of each discharge-side check valve 47, 48 has a higher specific gravity than water. Therefore, when water is accumulated in the bathtub 11, the ball 50 does not float and the check valves 47 and 48 are not closed. Therefore, water can be easily infiltrated from the bathtub 11 into the pipe. Therefore, at the time of starting the reheating of the bath water described above, it is possible to prevent the air staying in the pipe from being sucked into the pump of the hot water supply machine 13 and applying a load to the pump.

Further, when the bath water is replenished, the discharge side check valves 47 and 48 are closed as described above, so that the heated hot water flowing into the bathtub 11 from the water heater 13 is sucked into the water heater 13 side. Can be suppressed. Therefore, the temperature rise of the bath water at the time of reheating can be detected accurately, and temperature control can be performed accurately. In addition, when the bathtub water in the bathtub 11 is discharged, the discharge-side check valves 47 and 48 are opened, so that the accumulated water in the bathtub circulation device 10 can be discharged reliably. Therefore, it is possible to prevent a possibility that water stays in the bathtub circulation device 10 and causes the generation of bacteria.
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.

  In the embodiment, the circulation tool body 18 is formed with two circulation channels, and the two discharge-side check valves 47 and 48 are provided in the circulation channel. Alternatively, a single circulation path may be formed, and one discharge-side check valve may be provided in the circulation path.

  In the embodiment, the circulation tool body 18 is attached and fixed to the bathtub 11 so that the opening / closing operation direction of the balls 50 in the check valves 47 and 48 is tilted within a range from the vertical direction to a maximum of 30 °; The discharge port 65 may be attached and fixed to the circulation device main body 18 so as to face a direction inclined within a range from the vertical direction up to 30 °. 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 °.

  Instead of the ball 50 as the valve body, use another configuration, for example, a plate-like one supported by a hinge at the end.

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 sectional view showing a bathtub and a circulation type water heater. The longitudinal cross-sectional view which shows the circulation tool for bathtubs. The front view which shows the circulation tool main body. Sectional drawing of the AA in FIG. The fragmentary sectional view of the BB line in FIG. (A) is the fragmentary sectional view of CC line in FIG. 5, (b) is the fragmentary sectional view of DD line similarly. (A) is a front view which shows a cover, (b) is sectional drawing of the EE line in (a). (A) is a front view which shows a filter base, (b) is sectional drawing of the FF line in (a). (A) is a partial longitudinal cross-sectional view which shows a suction side 1st check valve, (b) is a partial longitudinal cross-sectional view which shows the operating state. The front view which shows the circulation tool main body of the state which removed the cover. (A) is a fragmentary longitudinal cross-sectional view which shows the discharge side 1st check valve, (b) is a fragmentary longitudinal cross-sectional view which shows the operation state, (c) is a fragmentary sectional view of the GG 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, 43 ... 1st check Valve: 47 ... discharge side first check valve, 48 ... discharge side second check valve, 49 ... valve lid, 50 ... ball, 52 ... suction hole constituting first suction port, 53 ... second suction port , 54 ... guide portion, 55 ... discharge space, 61 ... suction ports constituting the first suction port and the second suction port, 63, 65 ... discharge ports as the first discharge port and the second discharge port 64 ... Suction ports constituting the first suction port and the second suction port, 67 ... Similarly suction passage, 68 ... Similarly suction passage.

Claims (5)

In the circulation device for bathtubs fixed to the side wall of the bathtub and connected to the circulation type water heater provided outside the bathtub via a circulation hot water supply pipe and a return pipe,
The circulation tool main body is provided with a check valve that is opened and closed in the vertical direction so as to be positioned in the circulation flow path of the bath water between the bathtub and the circulating water heater, and the valve body of the check valve A bath circulator characterized by being made of a material having a specific gravity greater than that of water. The said check valve will be in the state which opens a circulation flow path in the state where the bathtub water does not accumulate in the bathtub, The circulator for bathtubs of Claim 1 characterized by the above-mentioned. 1st connection part and 2nd connection part which are connected to the outward or return path of the bath water provided between the circulation type water heater outside the bathtub, and the circulation type water heater via the 1st or 2nd connection part The first water inlet and the second air inlet for sucking in the bathtub water in the bathtub, and the circulating water heater discharges the bathtub water into the bathtub through the first connection part or the second connection part. Provided on a flow path that connects the first discharge port and the second discharge port, and the first connection portion and the first discharge port, and allows the flow of bath water from the first connection portion side toward the first discharge port side. And a first check valve that restricts the flow in the reverse direction, and a flow path that communicates the second connection portion and the second discharge port, from the second connection portion side to the second discharge port side. A second check valve that allows the flow of bathtub water toward the water and regulates the flow in the opposite direction;
While allowing the flow of bathtub water from the first suction port to the first connection portion, restricting the flow in the opposite direction, and flowing from the second suction port to the second connection portion In the circulator for bathtubs configured to restrict the flow in the opposite direction,
A circulator for bathtubs, wherein the first and second check valves are ball check valves, and the ball check valves are formed of a material having a specific gravity greater than that of water. The said check valve will be in the state which opens the 1st discharge port and the 2nd discharge port in the state where bathtub water does not accumulate in the bathtub, The circulation tool for bathtubs of Claim 1 characterized by the above-mentioned. The circulator for bathtubs according to claim 3 or 4, wherein the ball of the ball check valve is free.

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