JPH11201557A - Structure of hot water supply port of bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a hot water supply port of a bathtub for comfortably bathing by reducing a noise at the time of reheating bathtub water. SOLUTION: A hot water supply port member 3 for supplying a hot water for filling or a hot water for reheating bathtub water is mounted at a bathtub 1, and a hot water supply tube 5 to which the hot water is supplied from a water heater communicates with the member 3. A stop valve 25 for opening and closing a channel 22 for supplying hot water in the member 3 is internally mounted in the channel 22. A valve operating unit for operating to close the valve 25 when hot water is discharged in an abnormal state from the member 3 is provided at the member 3. An inspection port 30 of the channel having the valve 25 is provided at the member 3, and a cap 31 for blocking the port 30 is detachably mounted at the port 30. A guide hole 34 for guiding a slide when the valve 25 is opened and closed is provided at the cap 31. A solid structure having no gap between the hole 34 and a male threaded part 32 of an outer periphery of the cap 31 is formed at the cap 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply system for supplying hot water to a bath tub for filling or reheating.

[0002]

2. Description of the Related Art The structure of a hot water supply port of a conventional bathtub has been formed as shown in FIGS. A through hole 2 is formed in the side wall of the bathtub 1 so as to penetrate in and out, and a hot water supply member 3 is mounted in the bathtub 1 at the portion of the through hole 2. The through hole 2 provided in the side wall of the bathtub 1 is a circular hole, and a packing 4 having a substantially U-shaped cross section is attached to the inner periphery of the through hole 2 so as to cover the entire periphery. An annular external mounting bracket 6 is attached to an end of the hot water supply pipe 5 supplied with hot water from the water heater, and the external mounting fitting 6 is integrally provided with a male screw cylinder 7 communicating with the hot water supply pipe 5. The outer fitting 6 is arranged outside the side wall of the bathtub 1, the outer periphery of the outer fitting 6 is brought into contact with the packing 4, and the male screw cylinder 7 is inserted into the through hole 2. An annular inner fitting 8 is arranged inside the side wall of the bathtub 1, and the outer periphery of the inner fitting 8 is in contact with the packing 4. A packing 10 is mounted on both sides of the mounting nut 9, and the mounting nut 9 is arranged inside the inner mounting bracket 8. The mounting nut 9 is screwed into the male screw cylinder 7 to fix the hot water supply pipe 5.
A main body fixing plate 11 is disposed inside the mounting nut 9, the main body fixing plate 11 is mounted on the inner mounting bracket 8 with mounting screws 12, and the hot water supply port member 3 is disposed inside the main body fixing plate 11, Mouth member 3 is mounting screw 1
At 3, it is attached to the main body fixing plate 11. Hot water supply member 3
The supply port 14 projecting from the back of the supply port 14 is inserted through the opening 15 of the main body fixing plate 11 into the male screw cylinder 7 and sealed by an O-ring 16 mounted on the outer periphery of the supply port 14. A cover 17 is arranged on the front surface of the hot water port member 3 so as to cover the hot water port member 3, and the cover 17 is attached to the hot water port member 3 with mounting screws 18. A plate 19 is mounted on the front surface of the cover 17 so as to cover the mounting screw 18.

A first hot water supply port 2 is provided on both left and right sides of the hot water supply port member 3.
0 and a second hot water supply port 21 are provided, and a flow path 22 communicating with the supply port 14 in the hot water supply port member 3 communicates with the first hot water supply port 20 and the second hot water supply port 21. A valve element 23 that can open and close the first hot water supply port 20 is disposed in the first hot water supply port 20. Normally, the valve element 23 is closed by a spring 23a so that the first hot water supply port 20 is closed by the valve element 23. It is energized. The valve element 23 is closed when the flow rate of hot water supplied from the supply port 14 is low, and is opened against the spring 23a when the flow rate is high. The second hot water supply port 21 communicates with the flow path 22 at a portion not shown,
A suction hole 21a is formed in the upper end of the second hot water supply port 21. In the middle of the flow path 22 in the hot water supply member 3, the valve seat 2 is provided.
The valve seat 24 can be opened and closed by a water shutoff valve 25 that is vertically movable inside the hot water supply port member 3. The water stop valve 25 is formed by providing a valve portion 25b for opening and closing the valve seat 24 on a valve stem 25a that is long in the vertical direction.
a is slidably supported up and down. A spring 26 for urging the water stop valve 25 upward is mounted on the water stop valve 25, and the water stop valve 25 is normally opened by the force of the spring 26. The water supply port member 3 is provided with a sleeve 27 projecting downward at a position corresponding to the water stop valve 25, and a shape memory alloy material 28 as a member for operating the water stop valve 25 is provided inside the sleeve 27. It is. This shape memory alloy material 2
Numeral 8 is formed in a coil spring shape, and the lower end of the shape memory alloy material 28 is fixed to the lower end of the sleeve 27, and the upper end of the shape memory alloy material 28 is fixed to the lower end of the valve stem 25 a of the water stop valve 25. . When the shape memory alloy material 28 detects a temperature higher than a predetermined temperature, the shape memory alloy material 28 operates to contract and lowers the water stop valve 25 against the force of the spring 26 so that the valve portion 25 b of the water stop valve 25 moves. The valve seat 24 is closed.

A check port 30 is provided in the hot water supply port member 3 at a position above the water stop valve 25 so as to communicate with the flow path 22, and the check and cleaning of the water stop valve 25 and the like is performed at the check port 30. And so on. A cap 31 is detachably attached to the inspection port 30 by screwing. The cap 31 and the hot water supply member 3 are formed of a synthetic resin such as polyphenylene ether resin. A male screw part 32 is provided on the outer periphery of the cap 31, and a female screw part 33 is provided on the inner circumference of the inspection port 30. By screwing the male screw part 32 into the female screw part 33, the cap 31 is connected to the inspection port 30. It is attached detachably. In the center of the cap 31, there is provided a guide hole 34 for opening the lower surface, and the upper end of the valve rod 25a of the water stop valve 25 is slidably inserted into the guide hole 34. Further, between the male screw portion 32 of the cap 31 and the guide hole 34, an annular cavity 35 that opens downward is provided. By providing the cavity 35 in the cap 31, a thick portion cannot be formed, and the resin in the cap 31 formed of a synthetic resin cannot be shrunk.

The operation of the hot water supply port of the bath tub constructed as described above will be described as follows. When hot water is supplied to the bathtub 1, hot water heated to a temperature suitable for hot water supply is supplied from the water heater to the flow path 22 in the hot water supply port member 3 via the hot water supply pipe 5,
Hot water is sent to the first hot water supply port 20 and the second hot water supply port 21 when the water stop valve 25 is opened, and since the flow rate of the hot water is large, the valve body 23 is opened at this flow rate and the first hot water supply port 20 and 2nd hot water supply 2
Hot water is discharged from both of them, and hot water is filled in bathtub 1.
When the temperature of the hot water in the bath tub 1 drops and the reheating is performed in a state where the hot water is filled in the bath tub 1, high-temperature hot water (for example, 93 ° C
Is supplied to the first hot water supply port 20 and the second hot water supply port 21 when the water shutoff valve 25 is open. Hot water is discharged from the second hot water supply port 21 while being closed, and reheated so as to heat the hot water in the bathtub 1. At this time, the hot water discharged from the second hot water supply port 21 is high-temperature hot water.
Since the hot water inside is sucked in, the high-temperature hot water and the low-temperature hot water are mixed and discharged into the bathtub 1, the temperature of the shape memory alloy material 28 in the sleeve 27 does not increase, and the shape memory alloy material 28
Is maintained in that state, and the open state of the water stop valve 25 is maintained. When the hot water is refilled in a state where hot water is not filled in the bathtub 1 or in a state where the water level is low, high-temperature hot water is discharged from the second hot water supply port 21 in the same manner as described above. In order to discharge hot water (for example, hot water of about 93 ° C.), the shape memory alloy material 28 is heated with high-temperature hot water via the sleeve 27, and when the temperature exceeds a predetermined temperature, the shape memory alloy material 28 is deformed so as to be reduced. Water stop valve 2 against the force of spring 26
5, the valve seat 24 is closed by the water stop valve 25, and the supply of hot water is stopped.

[0006]

By the way, in the above-mentioned prior art, when hot water is supplied, hot water supplied from the hot water supply pipe 5 enters the flow path 22 of the hot water supply member 3 from the supply port 14 and the valve is opened. The first hot water supply port 20 and the second hot water supply port 21 through the seat 24
Hot water is discharged from the hot water outlet member 3, when hot water passes through the flow path 22 in the hot water supply port member 3, a vortex is generated in the cavity 25 of the cap 31,
There is a problem that noise is generated by the vortex. This noise does not cause much problem when the bath is filled with water, but there is a problem in that reheating, which is often performed in a bathing state, becomes loud and impedes comfortable bathing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above description, and has as its object to provide a structure of a hot water supply port of a bathtub which can reduce noise during reheating and provide a comfortable bath.

[0008]

In order to solve the above problems, the structure of the hot water supply port of the bath tub according to the present invention comprises a hot water supply port member 3 for supplying hot water for filling and hot water for reheating to the bath tub 1. Bathtub 1
A hot water supply pipe 5 to which hot water is supplied from a water heater and a hot water supply port member 3 communicate with the hot water supply port member 3, and a water stop valve 25 capable of opening and closing the flow path 22 in a hot water supply flow path 22 in the hot water supply port member 3. The hot water supply member 3 is provided with a valve operating portion that operates to close the water stop valve 25 when hot water is discharged from the hot water supply member 3 in an abnormal state. An inspection port 30 for the flow path 22 is provided, and a cap 31 for closing the inspection port 30 is attached to and detached from the inspection port 30 by screwing a male screw portion 32 on the outer periphery of the cap 31 to a female screw portion 33 on the inner periphery of the inspection port 30. When the cap 31 is provided with a guide hole 34 that is freely attached and guides sliding when the water stop valve 25 is opened and closed, the guide hole 34 of the cap 31 and the male screw portion 32 on the outer periphery of the cap 31 are connected. That there is no solid space between them To butterflies. Since the cap 31 has a solid structure without the cavity 35 as in the related art, vortex does not occur when hot water flows in the flow path 22, so that noise during reheating can be reduced and comfortable bathing can be performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a hot water supply port of a bathtub according to the present invention is basically the same as that of the conventional example except for the cap 31, so that the same reference numerals are given to the same portions in the drawings, and duplicate explanations are omitted. The cap 31 is formed of a synthetic resin in a shape as shown in FIG. A male screw portion 32 is provided on the outer periphery of the substantially disk-shaped cap 31, and a guide hole 34 for opening the lower end is provided at the center of the cap 31, and a space between the guide hole 34 and the male screw portion 32 is provided. It has a real structure. A hexagonal head 36 is provided on the upper part of the cap 31. The cap 31 is arranged at the inspection port 30 of the hot water supply port member 3, and is attached by screwing the male screw part 32 to the female screw part 33 of the inspection port 30. Since such a cap 31 does not have the cavity 35 as in the related art, a vortex is less likely to be generated when hot water flows in the flow path 22 and the noise can be reduced. In particular, the noise during reheating can be reduced and a comfortable bathing can be performed. .

The cap 3 having the cavity 35 as in the conventional example
No. 1 and the noise at the time of reheating when the cap 31 of the cavity 35 was used as in the present invention were measured, and the results in the following Tables 1 and 2 were obtained. Table 1 is for a conventional example, and Table 2 is for the present invention, all showing the results of frequency analysis. Further, in Table 1, the background noise is noise in a state in which reheating is not performed. In the present invention, the measurement was performed both in a state where the cover 17 was attached and in a state where the cover 17 was removed.

[0011]

[Table 1]

[0012]

[Table 2]

From the above results, it can be seen that the present invention has a vibration sound (about 500 to 1000 Hz) and a resonance sound (about 2
000 Hz) can be prevented.

[0014]

As described above, the present invention has a solid structure with no gap between the guide hole of the cap and the external thread portion on the outer periphery of the cap. When hot water flows, vortices are not generated, and noise during reheating can be reduced, and comfortable bathing can be performed.

[Brief description of the drawings]

FIG. 1 is a partially omitted cross-sectional view of an example of the present invention as viewed from a side.

FIGS. 2A and 2B are cross-sectional views as viewed from the front, in which FIG. 2A is a state in which a valve element of a first hot water supply port is closed, FIG. 2B is a state in which a valve element of the first hot water supply port is open, and FIG. Indicates a state where the water shutoff valve is closed.

FIG. 3 shows the same cap as the above, (a) is a plan view,
(B) is a front view, (c) is a bottom view, and (d) is a cross-sectional view.

FIG. 4 is an exploded perspective view showing a conventional example.

FIG. 5 is a partially omitted cross-sectional view of a conventional example viewed from a side in an assembled state.

FIGS. 6A and 6B are cross-sectional views as viewed from the front, in which FIG. 6A is a state in which a valve element of a first hot water supply port is closed, FIG. 6B is a state in which a valve element of the first hot water supply port is open, and FIG. Indicates a state where the water shutoff valve is closed.

FIG. 7 shows the same cap as the above, (a) is a plan view,
(B) is a front view, (c) is a bottom view, and (d) is a cross-sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 3 Hot-water supply member 5 Hot-water supply pipe 22 Flow path 25 Water stop valve 30 Inspection port 31 Cap 32 Male screw part 33 Female screw part 34 Guide hole

Claims (1)

[Claims] 1. A hot water supply member for supplying hot water for hot water filling or hot water for reheating to a bath tub is attached to the bath tub, and a hot water supply pipe to which hot water is supplied from a water heater is connected to the hot water supply port member. A valve actuation in which a water stop valve capable of opening and closing this flow path is provided in a flow path for hot water supply in the mouth member, and the water stop valve is operated to close the water stop valve when hot water is discharged from the hot water supply member in an abnormal state. A part is provided in the hot water supply member, and a check port of the flow path having the water shutoff valve is provided in the hot water supply member, and a cap for closing the check port is provided on the female screw portion on the inner circumference of the check port. In the structure of the hot water supply port of the bathtub provided with a cap and a guide hole for guiding sliding when opening and closing the water stop valve, the guide hole of the cap and the outer periphery of the cap Characterized by having a solid structure with no gap between it and the male thread The structure of the hot water inlet of the bathtub.