JP7146251B2 - Bathtub hot water supply adapter - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act (1) Hatano Seisakusho Co., Ltd. has sold hot water supply adapters for bathtubs invented by Shinsei Kobayashi and Masayoshi Yamagata.

TECHNICAL FIELD The present invention relates to a hot water supply port adapter for a bathtub, which is attached to the wall of a bathtub in a penetrating state and for supplying hot water into the bathtub from a water heater outside the bathtub.

2. Description of the Related Art A hot water supply system capable of reheating a bathtub in a general household or the like has a circulating hot water supply port adapter inserted through the wall of the bathtub. There are two outer pipe connection ports, first and second, on the outside of the bath of the hot water supply port adapter. , a return pipe for returning the hot water in the bathtub to the water heater is connected to the second outer pipe connection port. Hot water from the water heater is supplied into the adapter through the first outer pipe connection port and discharged into the bathtub, while hot water in the bathtub is sucked into the adapter and passed through the second outer pipe connection port. It is designed to be returned to the water heater.

A non-polar type hot water supply port adapter is configured to operate normally regardless of whether the forward pipe or the return pipe is connected to either of the first and second outer pipe connection ports.

Patent Document 1 below discloses a non-polar type hot water supply port adapter with a check valve. The hot water supply port adapter includes a first flow path communicating with the first outer tube connection port, a second flow path communicating with the second outer tube connection port, and a discharge port facing the bathtub, which communicates with each flow path. It has an outlet, a suction port, and a check valve provided at each discharge port and each suction port.

In this hot water supply port adapter, when the supply pipe is connected to the first outer pipe connection port, hot water supplied from the hot water supply machine is introduced into the first flow path through the supply pipe, and the first flow Hot water in the bathtub is discharged from the discharge port of the passage room into the bathtub, and hot water in the bathtub is sucked from the suction port of the second flow path and returned to the water heater through the second outer pipe connection port and the return pipe. It's becoming Conversely, when the feed pipe is connected to the second outer pipe connection port, the hot water from the water heater is discharged into the bathtub through the feed pipe, the second flow path, and the discharge port, and the hot water in the bathtub is discharged. is sucked from the suction port of the first flow path and returned to the water heater through the first outer pipe connection port and the return pipe.

On the other hand, among conventional water heaters, a one-can two-channel type water heater is well known. This water heater has a hot water supply circuit on the bathtub side that supplies hot water to the bathtub when reheating or refilling water, and another hot water supply circuit that supplies hot water to places other than the bathtub, such as the kitchen and washstand, coexisting in one combustion chamber. is provided.

In a hot water supply system in which the non-polar hot water supply port adapter with a check valve is applied to such a 1-can, 2-channel hot water supply machine, there is a possibility that abnormal noise may be generated due to vibration of the check valve. That is, generally, the check valve of the hot water supply port adapter is closed in the natural state, and the inside of the hot water supply circuit on the bathtub side is closed when the circuit is not in use. In such a state, when hot water is supplied from another hot water supply circuit, that is, when the water in the other hot water supply circuit is heated, the bathtub side hot water supply circuit is also heated in the hot water supply machine, and the hot water supply in the bathtub side hot water supply circuit is heated. The remaining water expands and the pressure in the hot water supply circuit on the bathtub side increases. As a result, the check valve of the hot water supply port adapter connected to the hot water supply circuit on the bathtub side vibrates, generating an abnormal noise, which may make the user feel uncomfortable.

Therefore, in the hot water supply port adapter shown in Patent Document 1 below, the check valve provided at the suction port of each flow path is arranged in a slightly open state that is slightly spaced from the suction port in a natural state. When the hot water supply circuit on the bathtub side is heated and the pressure rises when it is not in use, the pressure is released from the suction port in the slightly open state, thereby preventing the check valve from vibrating and eventually making an abnormal noise. I have to.

Patent No. 6149422

As described above, the conventional hot water supply port adapter shown in Patent Document 1 has a suction port of one side flow path that is a flow path on the discharge side (outgoing flow path) and a flow path on the suction side (return flow path). The suction port of the flow passage on the other side is slightly open, but when the hot water in the bathtub is circulated at a low flow rate, the water pressure is insufficient and the suction port of the flow passage on the discharge side is not checked. The valve is not reliably closed and is maintained in a slightly open state. Therefore, part of the hot water supplied from the water heater to the discharge-side channel flows out from the suction port of the discharge-side channel to the bathtub side. Here, in a normal hot water supply port adapter, the suction port of the discharge side channel and the suction port of the suction side channel are arranged so as to be adjacent to each other on the left and right, and the front sides of the two adjacent suction ports are A front cover is provided to cover it. As a result, the hot water that flows out from the suction port of the discharge-side flow path stays in the front cover and is sucked from the suction port of the suction-side flow path, causing a so-called short circuit, which efficiently flows hot water from the water heater into the bathtub. A problem arises that it cannot be supplied well.

Furthermore, when hot water is sucked in by the short circuit during reheating, the hot water causes the water heater to erroneously detect that it has reached the set temperature for reheating, and reheating ends when the water temperature in the bathtub is lower than the set temperature. A problem arises.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot water supply port adapter for a bathtub that can prevent the occurrence of abnormal noise and the occurrence of a short circuit.

In order to solve the above problems, the present invention has the following means.

[1] A partition member main body having a front surface facing the inside of the bath, first and second flow paths arranged so as to penetrate the bathtub wall, provided on the front surface of the partition member main body, and a first discharge port and a first suction port that communicate with the first flow path; a second discharge port and a second suction port that are provided on the front surface of the partition member body and communicate with the second flow path; First and second discharge side check valves and first and second suction side check valves provided at the first and second discharge ports and the first and second suction ports are provided, and hot water is supplied from outside the bathtub. The water is supplied to either one of the first and second flow paths, passes through the one flow path, and is discharged into the bathtub from the discharge port corresponding to the flow path, and the hot water in the bathtub is discharged. , a hot water supply port adapter for a bathtub that is sucked from a suction port corresponding to the other flow path and flows out of the tub through the other flow path,
The first and second discharge side check valves are arranged in a manner to close the front sides of the first and second discharge ports, and are close to the opening edges of the first and second discharge ports. , configured to block the first and second outlets,
The first and second discharge side check valves are spaced forward from the opening edges of the first and second discharge ports in a normal state in which the pressure in the discharge direction and the pressure in the suction direction are balanced. A hot water supply port adapter for a bathtub, characterized in that it is arranged as

[2] Ribs are provided along the opening surfaces of the first and second ejection ports,
2. The hot water heater for a bathtub according to the preceding item 1, wherein the rib is provided with a support projection projecting forward, and the support projection supports the first and second discharge side check valves in a state of being pushed forward. mouth adapter.

[3] The bathtub hot water supply port adapter according to the preceding item 2, wherein the first and second outlets are each provided with a plurality of ribs, and each rib is provided with the support protrusion.

[4] The first discharge side check valve and the first suction side check valve are integrally formed, and the second discharge side check valve and the second suction side check valve are integrally formed. The hot water supply port adapter for a bathtub according to any one of the preceding items 1 to 3, which is formed.

[5] The first and second suction ports are arranged side by side, and the first and second discharge ports are arranged side by side below the first and second suction ports. 5. The hot water supply port adapter for a bathtub according to any one of 4.

According to the bathtub hot water supply port adapter of the invention [1], since the discharge side check valve provided at the discharge port of the partition member main body is set to the slightly open state in the normal state, from the discharge port in the slightly open state By releasing the pressure, it is possible to avoid an inadvertent pressure rise in the hot water supply circuit when the hot water supply circuit is not in use. Therefore, it is possible to prevent the check valve from vibrating due to the inadvertent increase in pressure and generating abnormal noise. Furthermore, since the hot water discharged from the discharge port normally flows outward in the radial direction orthogonal to the axial direction, it is possible to prevent the hot water discharged from one discharge port from flowing to the other discharge port side. can be prevented. Therefore, it is possible to prevent the hot water discharged from one of the discharge ports communicating with the discharge-side channel from being sucked from the other discharge port, which is in a slightly opened state, communicating with the suction-side channel, thereby reliably preventing the occurrence of shortcuts. can be prevented.

According to the bathtub hot water supply port adapters of the inventions [2] and [3], the discharge side check valve can be reliably supported in a desired form, so that high operational reliability can be obtained and quality can be improved. be able to.

According to the bathtub hot water supply port adapter of the invention [4], since the discharge side check valve and the suction side check valve are integrally formed, it is only necessary to attach the two valves integrally to the partition member main body. , two check valves on the discharge side and the suction side can be assembled at once. In this manner, the check valve can be assembled efficiently, and the assembly of the adapter as a whole can be performed easily and smoothly.

According to the bathtub hot water supply port adapter of the invention [5], the above effects can be obtained more reliably.

FIG. 1 is a side cross-sectional view showing a hot water supply port adapter for a bathtub, which is an embodiment of the present invention. FIG. 2 is an exploded perspective view of the hot water supply port adapter of the embodiment. FIG. 3 is a perspective view showing an exploded partition member applied to the hot water supply port adapter of the embodiment. FIG. 4 is a front view showing a valved partition member main body applied to the hot water supply port adapter of the embodiment. FIG. 5 is a bottom view showing the main body of the partition member with valve of the embodiment. FIG. 6 is a side cross-sectional view showing the main body of the partition member with valve of the embodiment. FIG. 7 is a front view showing the partition member main body of the embodiment. FIG. 8 is a bottom cross-sectional view showing the partition member main body of the embodiment. 9 is a cross-sectional view of the main part of FIG. 7, FIG. 9A is a cross-sectional view along the line Da-Da in FIG. 7, FIG. 7 is a cross-sectional view along the Dc-Dc line of FIG.

FIG. 1 is a side cross-sectional view showing a hot water supply port adapter for a bathtub according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing the hot water supply port adapter. As shown in both figures, this hot water supply port adapter comprises an outside-of-tank mounting member 1, an inside-of-tank mounting member 2, a partition member 3, and a filter cover 9 as basic components. In this embodiment, to facilitate understanding of the invention, the inside of the bathtub will be referred to as the "front side" and the outside of the bathtub will be referred to as the "rear side" along the axial direction of the hot water supply port adapter.

The tank exterior mounting member 1 includes a cylindrical outer cylinder portion 12 whose front side is open and whose rear side is closed, and a cylindrical inner cylinder portion 11 coaxially arranged inside the outer cylinder portion 12 . , a flange portion 15 provided on the outer periphery of the front end of the outer cylindrical portion 12, and tubular first and second outer tube connection ports 1a and 1b provided on the rear outer surface of the outer cylindrical portion 12. As shown in FIG.

The inner space of the inner cylindrical portion 11 is configured as part of a first flow path A described later, and the annular space between the inner cylindrical portion 11 and the outer cylindrical portion 12 is part of a second flow path B described later. is configured as The first outer tube connection port 1a communicates with the inner cylinder portion 11 as the first flow path A, and the second outer tube connection port 1b communicates with the inner cylinder portion 11 and the outer cylinder portion as the second flow path B. It communicates with the annular space between 12 .

A female screw for assembling the in-tank mounting member 2 is formed on the inner peripheral surface of the outer cylindrical portion 12 of the out-tank mounting member 1 .

The in-vessel mounting member 2 includes a cylindrical portion 21 with both ends opened, and a flange portion 25 provided on the outer circumference of the front end of the cylindrical portion 21 . The outer peripheral surface of the in-tank mounting member 2 is provided with a male thread corresponding to the female thread of the out-of-tank mounting member 1 so that it can be screwed into the cylindrical hole of the outer cylindrical portion 12 of the out-of-tank mounting member 1 . It is configured.

As shown in FIGS. 1 and 2, the flange portion 15 of the external attachment member 1 is attached to the periphery of the attachment hole H on the outer surface of the peripheral wall of the bathtub (bathtub wall portion W) via a packing 81 (see FIG. 1). 1, the flange portion 25 of the in-tank mounting member 2 is in pressure contact with the peripheral edge portion of the mounting hole H on the inner surface of the bathtub wall W via the packing 82 (see FIG. 1). The cylindrical portion 21 of the mounting member 2 is screwed into the outer cylindrical portion 12 of the external mounting member 1 through the mounting hole H and fixed. As a result, the flange portions 15 and 25 of both the mounting members 1 and 2 sandwich the peripheral edge portion of the mounting hole in the bathtub wall portion W, so that the mounting members 1 and 2 are attached to the bathtub wall portion W in a penetrating state.

3 is an exploded perspective view of the partition member 3, FIGS. 4 to 6 are views showing the valve-equipped partition member main body 31, and FIGS. 7 and 8 are views showing the partition member main body 31. FIG. As shown in these figures, the partition member 3 includes a partition member main body 31 and a disk-shaped front cover 39 arranged to cover the front side of the partition member main body 31 .

The partition member main body 31 is an integral body made of hard synthetic resin and has a disc portion 32 provided at the front end and a cylindrical portion 35 integrally formed on the back side of the disc portion 32 so as to extend rearward along the axis. Consists of molded products.

In the disc portion 32 of the partition member main body 31, the first ejection port 4a and the second ejection port 4b are formed side by side under the intermediate portion. A first suction port 5a and a second suction port 5b are formed side by side above the outlet 4b. As shown in the front view of the partition member main body 31 in FIG. 7, between the first and second outlets 4a and 4b, and the first and second suction ports 5a and 5b, which are arranged side by side, a lateral Partitions 37 are formed respectively, and vertical partitions 36 are respectively formed between the first discharge port 4a and the first suction port 5a, and the second discharge port 4b and the second suction port 5b, which are arranged vertically. It is

The first discharge port 4a and the first suction port 5a are communicated with the inside of the cylindrical portion 35 via a flow path forming portion 33 integrally formed on the rear surface side of the disk portion 32 in a bulging shape.

The second discharge port 4 b and the second suction port 5 b communicate (open) to the outside of the cylindrical portion 35 on the rear surface side of the disk portion 32 .

A partition wall 45 is formed on the front surface of the disk portion 32 of the partition member main body 31 along the vertical direction between the first and second discharge ports 4a and 4b. This partition wall 45 is for preventing hot water discharged from one of the first and second discharge ports 4a and 4b from being sucked into the other discharge port.

As shown in FIGS. 7 and 8, the first and second outlets 4a and 4b of the partition member body 4 are integrally formed with three ribs 41 extending vertically along the opening surfaces thereof. there is

9(a) is a cross-sectional view taken along line Da--Da in FIG. 7, FIG. 9(b) is a cross-sectional view along line Db--Db in FIG. 7, and FIG. 9(c) is a cross-sectional view along line Dc-Dc in FIG. As shown in FIGS. 7 and 9A, the innermost rib 411 (closer to the axis) of the three ribs 41 extends along the vertical partition 36 from the lower ends of the opening edges of the discharge ports 4a and 4b. 7 and 9(b), the second rib 412 from the inside is formed at the lower ends of the opening edges of the discharge ports 4a and 4b. 7 and 9(c), the third (outermost) rib 413 from the inside It is formed so as to extend downward from the horizontal partition 37 and reach the vicinity of the lower ends of the opening edges of the discharge ports 4a and 4b.

Further, as shown in FIGS. 9(a) to 9(c), each rib 41 has a support protrusion 42 projecting forward from the front edge thereof. The tip (front end) position of the support projection 42 is formed so as to protrude forward from the opening surfaces of the discharge ports 4a and 4b.

As shown in FIGS. 3 to 6, the first and second valve members 6a and 6b provided at the discharge ports 4a and 4b and the suction ports 5a and 5b are elongate synthetic rubber sheet members having flexibility and elasticity. It is composed by Further, the lower halves of the valve members 6a and 6b are configured as first and second discharge side check valves 61a and 61b, and the upper halves are configured as first and second suction side check valves 62a and 62b. ing.

A valve mounting plate 65 for mounting the first and second valve members 6a and 6b to the partition member main body 4 is formed in a shape capable of closing both the first and second suction ports 5a and 5b. And openings 66a, 66b are formed corresponding to the second suction ports 5a, 5b. A rib 67 (see FIG. 4) is formed in the openings 66a and 66b so as to extend vertically across the openings 66a and 66b.

The disk portion 32 of the partition member main body 4 is operated by the first and second discharge side check valves 61a and 61b and the first and second suction side check valves 62a and 62b of the first and second valve members 6a and 6b. The first and second valve members 6a and 6b are arranged on the front side of the disk portion 32 so as to cover the first and second discharge ports 4a and 4b and the first and second suction ports 5a and 5b. Furthermore, in this state, the openings 66a and 66b of the valve mounting plate 65 correspond to the first and second suction side check valves 62a and 62b, and the opening edges of the openings 66a and 66b of the valve mounting plate 65 form partitions. It is fixed to the opening edges of the first and second suction ports 5a and 5b in the disc portion 32 of the member body 4. As shown in FIG. As a result, the boundary between the first discharge side check valve 61a and the first suction side check valve 62a of the first valve member 6a and the second discharge side check valve 61b and the second suction side of the second valve member 6b are separated. The boundary portions between the check valves 62b are pressed against the horizontal partition portions 37, 37 of the partition member main body 4 and fixed.

In this state, the suction side check valves 62a and 62b are fixed at their lower ends and elastically deformable in the front-rear direction with the lower ends as fulcrums. Furthermore, the opening edges of the openings 66a and 66b in the valve mounting plate 65 function as valve seats that can be in close contact with the outer peripheral edges of the suction side check valves 62a and 62b. Therefore, when pressure in the suction direction is applied to the check valves 62a and 62b by the water pressure of the hot water, the check valves 62a and 62b are elastically deformed rearward to open the first and second suction ports 5a and 5a. 5b is opened to allow hot water to be sucked in, and when pressure acts in the discharge direction, the check valves 62a and 62b are in close contact with the opening edges of the valve mounting plate 65, and the valve mounting plate 65 is closed. By closing the openings 66a and 66b, the first and second suction ports 5a and 5b are indirectly closed, and the discharge of hot water is restricted. In the present embodiment, the suction side check valves 62a and 62b are arranged in a normal state in which the pressure in the suction direction (rightward as viewed in FIG. 1) and the pressure in the discharge direction (leftward in FIG. 1) are balanced. are configured to be in close contact with the opening edge of the valve mounting plate 65 to close the first and second suction ports 5a and 5b.

On the other hand, the discharge-side check valves 61a and 61b are fixed at their upper ends so as to be elastically deformable in the front-rear direction with the upper ends as fulcrums. Furthermore, the opening edges of the first and second discharge ports 4a and 4b function as valve seats that can come into close contact with the outer peripheral edges of the discharge side check valves 61a and 61b. Therefore, when pressure is applied to the check valves 61a and 61b in the discharge direction, the check valves 61a and 61b are elastically deformed forward to open the first and second discharge ports 4a and 4b. While hot water is permitted to be discharged, basically, when the pressure in the suction direction is applied, the check valves 61a and 61b are in close contact with the opening edges of the first and second discharge ports 4a and 4b, The first and second outlets 4a and 4b are closed to limit the intake of hot water.

Here, as shown in FIGS. 5 and 6, in the present embodiment, ribs 41 provided along the opening surfaces of the first and second ejection ports 4a and 4b have support protrusions 42 projecting forward. are formed, the discharge side check valves 61a and 61b are supported by the support protrusions 42 so as to be pushed forward. For this reason, the discharge side check valves 61a and 61b are slightly pushed and bent forward in the normal state, and are slightly separated forward from the opening edges of the discharge ports 4a and 4b, and are in a slightly open state.

As shown in FIGS. 1 to 3, a front cover 39 is attached to the disk portion 32 of the partition member main body 31 so as to cover the front side thereof, and the partition member 3 is assembled.

A large number of suction holes 5 are formed in the front cover 39 of the partition member 3 so as to correspond to the first and second suction ports 5a and 5b. Hot water is sucked from the front side of the front cover 39 through the suction hole 5 into the first and second suction ports 5a and 5b.

A gap is formed between the lower edge of the disc portion 32 of the partition member 3 and the lower edge of the front cover 39, and the discharge opening 4 opens obliquely downward in the radial direction due to this gap. is formed. The hot water discharged forward from the first and second discharge ports 4a and 4b passes through the gap between the disk portion 32 and the front cover 39 and is discharged from the discharge opening 4. As shown in FIG.

The partition member 3 configured as described above is attached to the outside-tub attachment member 1 and the inside-tub attachment member 2 attached to the bathtub wall W. As shown in FIG. That is, the cylindrical portion 35 of the partition member 3 is passed through the cylindrical portion 21 of the in-tank mounting member 2 while the outer peripheral edge portion on the back side of the disc portion 32 of the partition member 3 is pressed against the front side of the flange portion 25 of the in-tank mounting member 2 . , the inner cylindrical portion 11 of the external mounting member 1 is connected in a watertight state via a packing 83 (see FIG. 1), and in this state, the partition member 3 is detachably fixed to the internal mounting member 2 by known fixing means. do.

In this assembled state, the interior of the inner cylindrical portion 11 of the external attachment member 1 and the interior of the cylindrical portion 35 of the partition member 3 communicate with each other. A first flow path A is formed that reaches the discharge port 4a and the first suction port 5a. Further, the annular space between the inner cylindrical portion 11 and the outer cylindrical portion 12 of the external attachment member 1 communicates with the annular space between the inner cylindrical portion 35 of the partition member 3 and the cylindrical portion 21 of the internal partition member 2. , the annular communication portion forms a second flow path B extending from the second outer tube connection port 1b to the second discharge port 4b and the second suction port 5b. In this embodiment, the first and second flow paths A and B are configured as independent flow paths.

As shown in FIGS. 1 and 2, the filter cover 9 includes a circular front wall portion 91 and a peripheral wall portion 95 extending rearward from the outer peripheral edge of the front wall portion 91 . The front wall portion 91 of the filter cover 9 covers the front surface of the front cover 39 of the partition member 3 , and the peripheral wall portion 95 covers the outer peripheral side surface of the disk portion 32 of the partition member 3 . It is detachably attached to the portion 32 .

A large number of suction holes 92 are formed in the front wall portion 91 of the filter cover 9 , and discharge openings 96 are formed in the lower edge portion of the peripheral wall portion 95 corresponding to the discharge openings 4 of the partition member 3 . It is

The hot water supply port adapter of this embodiment configured as described above includes a service pipe for supplying hot water from the outdoor water heater to the water supply port adapter, and a return pipe for returning the hot water from the water supply port adapter to the water heater. are connected to the first and second outer pipe connection ports 1a and 1b to supply hot water from the hot water heater into the bathtub (hot water storage process), and return the hot water in the bathtub to the hot water heater and return it to the hot water heater. It can perform reheating (circulation treatment) by returning it to the bathtub.

Further, the hot water supply port adapter of this embodiment is a so-called non-polar type that can be used by connecting either the forward pipe or the return pipe to any of the first and second outer pipe connection ports 1a and 1b. is. For example, when a feed pipe is connected to the first outer pipe connection port 1a and a return pipe is connected to the second outer pipe connection port 1b, the gas is supplied from the feed pipe to the first outer pipe connection port 1a. Hot water flows through the first flow path A, the water pressure of the flowing hot water opens the first discharge side check valve 61a, and the hot water is discharged from the first discharge port 4a. Further, the hot water discharged from the first discharge port 4a passes through the discharge opening 4 of the partition member 3 and the discharge opening 96 of the filter cover 9 and is discharged into the bathtub. In this case, in the first suction port 5a of the partition member 3, since the first suction side check valve 62a is closed by the water pressure of hot water flowing through the first flow path A, hot water is discharged from the first suction port 5a. is prevented.

Hot water in the bathtub is sucked through the suction hole 92 of the filter cover 9 and the suction hole 5 of the front cover 39 of the partition member 3, and the water pressure of the hot water that is sucked in opens the second suction side check valve 62b. Thus, hot water is sucked into the second flow path B through the second suction port 5b. Further, the hot water sucked into the second flow path B is returned to the water heater through the second flow path B, the second outer pipe connection port 1b and the return pipe. In this case, since the inside of the second flow path B becomes negative pressure at the second discharge port 4b of the partition member 3, the second discharge port 4b is blocked by the second discharge side check valve 61b, and the second discharge port 4b is closed. Hot water in the bathtub is prevented from being sucked from the outlet 4b.

On the other hand, when the feed pipe is connected to the second outer pipe connection port 1b and the return pipe is connected to the first outer pipe connection port 1a, the gas is supplied from the feed pipe to the second outer pipe connection port 1b. Hot water passes through the second flow path B, the water pressure of the flowing hot water opens the second discharge side check valve 61b, and the hot water is discharged from the second discharge port 4b. Further, the hot water discharged from the second discharge port 4b passes through the discharge opening 4 of the partition member 3 and the discharge opening 96 of the filter cover 9 and is discharged into the bathtub. In this case, since the second suction side check valve 62b of the second suction port 5b of the partition member 3 is closed by the water pressure of hot water flowing through the second flow path B, hot water is discharged from the second suction port 5b. is prevented.

Hot water in the bathtub is sucked through the suction hole 92 of the filter cover 9 and the suction hole 5 of the front cover 39 of the partition member 3, and the water pressure of the hot water that is sucked in opens the first suction side check valve 62a. Thus, hot water is sucked into the first flow path A through the first suction port 5a. Furthermore, the hot water sucked into the first flow path A is returned to the water heater through the first flow path A, the first outer pipe connection port 1a and the return pipe. In this case, in the first discharge port 4a of the partition member 3, since the inside of the first flow path A becomes negative pressure, the first discharge port 4a is blocked by the first discharge side check valve 61a, and the first discharge port 4a is closed. Hot water in the bathtub is prevented from being sucked from the outlet 4a.

As described above, in the hot water supply port adapter of the present embodiment, it does not matter which of the first and second outer pipe connection ports 1a and 1b is connected to either the forward pipe or the return pipe. Hot water can be circulated between machines.

In the hot water supply port adapter of the present embodiment constructed as described above, the discharge side check valves 61a and 61b provided at the discharge ports 4a and 4b of the partition member 3 are set to a slightly open state in the normal state. Therefore, even if it is connected to a 1-can 2-channel type water heater in which a hot water supply circuit on the bathtub side and another hot water supply circuit coexist in one combustion chamber, it is possible to reliably prevent the occurrence of abnormal noise. That is, in the hot water supply port adapter of the present embodiment, since the first and second flow paths A and B constituting a part of the hot water supply circuit for the bathtub are normally open to the atmosphere, the unused hot water supply circuit for the bathtub However, even if the hot water supply circuit is heated by the influence of other hot water supply circuits, it is possible to prevent the pressure in the hot water supply circuit for the bathtub in the unused state from increasing. Therefore, it is possible to prevent the check valves 61a, 61b, 62a, 62b from vibrating due to the increase in pressure and generating abnormal noise.

In addition, in the hot water supply port adapter of this embodiment, the discharge side check valves 61a and 61b are set to be slightly open in the normal state. Of the side check valves 61a and 61b, the suction side flow path (return flow path), for example, the discharge side check valve 61b arranged on the side of the second flow path B is not reliably closed, and the second discharge port 4b remains slightly open. Therefore, hot water may be sucked into the second flow path (flow path on the suction side) B from the slightly opened second discharge port 4b. However, in the hot water supply port adapter of this embodiment, the hot water discharged from the first and second discharge ports 4a and 4b of the partition member 3 is directed downward from both sides, in other words, perpendicular to the axial direction. Since it is configured to be discharged radially outward, the hot water discharged from the first outlet 4a on the side of the first flow path A as the flow path on the discharge side (outgoing flow path) is There is no flow to the 2 discharge port 4b side. Therefore, it is possible to reliably prevent the hot water discharged from the first discharge port 4a from being immediately sucked from the second discharge port 4b without being discharged into the bathtub. Therefore, hot water can be efficiently circulated between the bathtub and the water heater, and reheating can be performed smoothly.

Furthermore, in the hot water supply port adapter of this embodiment, a partition wall 45 is formed at the first and second discharge ports 4a and 4b on the front surface of the disk portion 32 of the partition member main body 31. Since hot water flowing out of one outlet is prevented from flowing toward the other outlet, it is possible to more reliably prevent shortcuts from occurring.

In addition, in the hot water supply port adapter of the present embodiment, ribs 41 are formed along the opening surfaces of the first and second outlets 4a and 4b of the partition member 3, and supporting projections 42 provided on the ribs 41 support the first and second outlets 4a and 4b. Since the first and second discharge side check valves 61a and 61b are pushed forward and supported, in a normal state, the first and second discharge side check valves 61a and 61b are reliably kept in a slightly opened state. In addition, when the water pressure is strong, the outer peripheral edge portions of the check valves 61a and 61b can be brought into close contact with the opening edge portions of the discharge ports 4a and 4b, thereby reliably closing them. In this manner, the discharge ports 4a and 4b can be reliably closed when necessary while maintaining a desired slightly opened state at normal times, so that high operational reliability and, in turn, high quality can be reliably obtained.

Furthermore, since a plurality of ribs 41 are formed in each of the discharge ports 4a and 4b, and each rib 41 is formed with a supporting projection 42, each of the discharge side check valves 61a and 61b is supported by the plurality of supporting projections 42. supported in a stable state. Therefore, the discharge-side check valves 61a and 61b can reliably operate as desired, thereby further improving operational reliability.

In addition, in the hot water supply port adapter of this embodiment, since the valve members 6a and 6b integrally having the discharge side check valves 61a and 61b and the suction side check valves 62a and 62b are used, one valve member is attached. Only two check valves can be assembled at once. In this manner, the check valves 61a, 61b, 62a, 62b can be assembled efficiently, and the assembly work of the entire adapter can be performed easily and smoothly.

In the above embodiment, the first discharge side check valve 61a and the first suction side check valve 62a are integrally formed, and the second discharge side check valve 61b and the second suction side check valve 62b are integrally formed. is integrally formed, but the present invention is not limited to this, and the check valves may or may not be integrally formed. For example, the first discharge side check valve 61a and the second discharge side check valve 61b are integrally formed, and the first suction side check valve 62a and the second suction side check valve 62b are integrally formed. Alternatively, the check valves 61a, 61b, 62a, 62b may be formed separately. Furthermore, any two of the four check valves 61a, 61b, 62a, and 62b may be integrally formed, and the remaining two check valves may be formed separately. Further, any three check valves may be integrally formed and the remaining one check valve may be formed separately, or four check valves may be integrally formed.

INDUSTRIAL APPLICABILITY The bathtub hot water supply port adapter of the present invention can be used as a hot water supply device that is assembled to the bathtub wall when hot water is supplied into the bathtub from an outdoor water heater.

1a: first outer pipe connection port 1b: second outer pipe connection port 31: partition member main bodies 4a, 4b: first discharge port, second discharge ports 41, 411 to 413: rib 42: supporting projections 5a, 5b: First suction port, second suction port 61a, 61b: first discharge side check valve, second discharge side check valve 62a, 62b: first suction side check valve, second suction side check valve 67: rib A: First flow path B: Second flow path W: Bathtub wall

Claims (5)

A partition member main body arranged so that the front face faces the inside of the bath; first and second flow paths arranged so as to penetrate the bathtub wall; a first discharge port and a first suction port that communicate with the flow path; a second discharge port and a second suction port that are provided on the front surface of the partition member body and communicate with the second flow path; The first and second discharge side check valves and the first and second suction side check valves provided at the second discharge port and the first and second suction ports are provided. The hot and cold water in the bathtub is supplied to one of the second flow paths, passes through the one flow path, and is discharged into the bathtub from the discharge port corresponding to the flow path. A hot water supply port adapter for a bathtub in which water is sucked from a suction port corresponding to the flow path and flows out of the bath through the other flow path,
The first and second discharge side check valves are arranged in a manner to close the front sides of the first and second discharge ports, and are close to the opening edges of the first and second discharge ports. , configured to block the first and second outlets,
The first and second discharge side check valves are spaced forward from the opening edges of the first and second discharge ports in a normal state in which the pressure in the discharge direction and the pressure in the suction direction are balanced. A hot water supply port adapter for a bathtub, characterized in that it is arranged as Ribs are provided along the opening surfaces of the first and second outlets,
2. The bathtub according to claim 1, wherein the rib is provided with a support projection projecting forward, and the support projection supports the first and second discharge side check valves in a state of being pushed forward. spout adapter. 3. The bathtub hot water supply port adapter according to claim 2, wherein a plurality of said ribs are provided on each of said first and second outlets, and each rib is provided with said support protrusion. The first discharge side check valve and the first suction side check valve are integrally formed, and the second discharge side check valve and the second suction side check valve are integrally formed. The hot water supply port adapter for a bathtub according to any one of claims 1 to 3. The first and second suction ports are arranged side by side, and the first and second discharge ports are arranged side by side below the first and second suction ports. The hot water supply port adapter for a bathtub according to any one of claims 1 to 3.

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