JP2001288795A - Hot water tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water tank wherein malfunction of a nozzle caused by a foreign matter and failure of jetting hot water are surely prevented. SOLUTION: A strainer 40 is provided below an atmospheric vent valve 30 in such a manner as to be inserted in an outflow opening 15. The strainer 40 comprises a cone-shaped filter part 41 and a flange part 42 expanded outwards from an upper end of the filter part 41. The filter part 41 is inserted into the outflow opening 15 from above and the flange part 42 is hooked to an upper side of a protrusion 16. The atmospheric vent valve 30 is seated on the flange part 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hot water tank,
In particular, the present invention relates to a hot water tank provided in a Western-style toilet or the like and used in a hot water washing device for washing a human buttocks with hot water.

[0002]

2. Description of the Related Art As is well known, this type of hot water washing apparatus jets hot water from a washing nozzle toward a human buttock to wash the buttock. Usually, a shower nozzle (anal washing nozzle) and a bidet nozzle are used. And two nozzles are provided. When a first cleaning switch, called a shower switch, is operated (e.g., pressed, touched, or approaching a fingertip), hot water from a hot water source is supplied to the shower nozzle. When a second cleaning switch called a bidet switch is operated, hot water is supplied to the bidet nozzle.

FIG. 5 is a system diagram of a hot water washing apparatus according to a conventional example, in which tap water is supplied through a pipe 1 and a valve 2 to a hot water tank 3.
And heated by the heater 4 to become hot water.

The hot water is supplied from an outlet 5 at the top of the hot water tank 3 to a pipe 6 composed of a hose, a flow control valve (flow control valve).
7, can be supplied to the shower nozzle 11 via the pipe 8, the switching valve 9 and the pipe 10, and can be supplied from the switching valve 9 to the bidet nozzle 13 via the pipe 12. The flow control valve 7 is provided with a manual dial 7a.

The switching valve 9 is switched by power means (not shown) such as a solenoid or a motor so as to connect the pipe 8 to the pipe 10 or 12.

[0006] Shower nozzle 11 and bidet nozzle 13
Are all nozzle bodies 11a,
The nozzle body 11a is provided with an outlet for hot water on the top surface on the tip side of the nozzle bodies 11a and 13a. However, the present invention can also be applied to a hot water cleaning apparatus using a motor-advanced cleaning nozzle other than such a hydraulically advanced type.

[0007] As shown in FIGS.
An outlet 15 provided on the upper surface of the hot water tank 3, a plurality of protrusions 16 protruding from the upper edge of the outlet 15, and fixed to the upper surface of the hot water tank 3 so as to cover the outlet 15. A housing 20 and an air release valve 30 disposed in the housing 20.

The housing 20 has a hat-shaped cross section having a ceiling surface 22 having an opening 21, a side wall surface 24 hanging down from the ceiling surface 22, and a flange portion 25 expanding in diameter from the side wall surface 24. And the flange 25 is a screw 2
6 is fixed to the upper surface of the hot water tank 3. From the housing 20, a branch tube-shaped hose connection tube 27
Is protruding.

The air release valve 30 has a valve plate 31 and a projection 32 projecting upward from the valve plate 31.
The valve plate portion 31 can be seated on the convex portion 16.
The protrusion 32 is inserted into the opening 21, and the air release valve 3
Guide 0 up / down movement.

When the valve 2 is opened and the hot water flows out of the hot water tank 3, the air release valve 30 is pushed up by the water pressure as shown in FIG.
The hot water is sent out from the hose connection tube 27 to the pipe 6 while being in close contact with the lower surface of the peripheral edge of the tube 1. When the valve 2 closes, the air release valve 30 descends and sits on the projection 16.

Since the projection 16 is interposed between the upper surface of the hot water tank 3 and the valve plate 31, a gap is formed between the two, and the inside of the hot water tank 3 is opened to the atmosphere through the gap. . When the atmosphere release valve 30 is lowered and the opening 21 is opened, the inside of the pipe 6 is also opened to the atmosphere.

By opening the hot water tank 3 and the pipe 6 to the atmosphere in this manner, backflow of water from the nozzles 11 and 13 is prevented.

In the thus constructed hot water washing apparatus, when a shower switch (not shown) is operated, the valve 2 opens and the switching valve 9 connects the pipe 8 to the pipe 10. As a result, warm hot water is supplied to the shower nozzle 11.
And the shower cleaning is started. The washing strength at this time can be adjusted by the flow control valve 7.

When a stop switch (not shown) is operated, the valve 2 closes. In this case, the switching valve 9 may be left as it is, or a switching operation may be performed so as to communicate the pipes 10 and 12.

When the bidet switch (not shown) is operated in the same manner as described above, the switching valve 9 connects the pipes 8 and 12 and supplies hot hot water to the bidet nozzle 13 to start the bidet washing. When the stop switch is operated, the valve 2 closes.

[0016]

In the hot water cleaning apparatus having such a hot water tank, foreign matter is generated by the nozzles 11 and 1.
3, the nozzle bodies 11a and 13a do not move smoothly. Also, the hot water ejection hole at the tip of the nozzle body may be clogged. In addition, the residue at the time of forming the hot water tank may remain in the hot water tank.

It is an object of the present invention to provide a hot water tank in which the malfunction of the nozzle and the poor ejection of the hot water due to such foreign matter are reliably prevented.

[0018]

The hot water tank of the present invention comprises:
In a hot water tank provided with an air release valve at an outlet of the hot water provided at an upper portion, a strainer is provided upstream of the air release valve.

In such a hot water tank, foreign matter is removed by the strainer, so that defective operation of the nozzle and defective hot water ejection are reliably prevented.

This strainer is provided on the upstream side of the air release valve, and after the hot water is stopped from the hot water tank, the downstream side of the strainer is opened to the atmosphere. For this reason,
Foreign matter trapped by the strainer falls off the strainer relatively easily. Therefore, the strainer is also prevented from being clogged.

In one embodiment of the present invention, the strainer includes a flange portion locked to the upper edge of the outlet of the hot water tank, and a filtering portion projecting downward from the flange portion.

In another aspect of the present invention, the strainer includes a flange portion bonded to a lower edge of the outlet of the hot water tank, and a filtering portion projecting downward from the flange portion.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an outflow portion of a hot water tank according to the embodiment, and FIG. 2 is a perspective view of a strainer.

The hot water tank 3A is also incorporated in the hot water washing device as shown in FIG.

In this embodiment, the air release valve 3
A strainer 40 is provided below the outlet 0 so as to be inserted into the outlet 15. The strainer 40 has a filter part 41 having a cone shape and a flange part 42 expanding outward from the upper end of the filter part 41.
1 is inserted into the outlet 15 from above, and the flange 42
Is locked above the convex portion 16. The atmosphere release valve 30 is seated on the flange portion 42.

Other constructions of this hot water tank are shown in FIGS.
The same reference numerals indicate the same parts. The operation of the atmosphere release valve 30 is the same as in FIGS.

By providing this strainer 40,
Foreign matter is prevented from flowing out of the hot water tank 3A to the pipe 6 side. When the valve 2 is closed, the atmosphere release valve 30 is seated on the flange portion 42 as shown in FIG.
Since the foreign matter trapped in the filtration unit 41 falls into the tank 3A, the strainer 40 is not clogged.

FIG. 3 shows a hot water tank 3 according to another embodiment.
B is a cross-sectional view of the outflow portion of B, FIG. 4 shows the structure of the strainer, FIG. 4A is a perspective view, and FIG.
It is sectional drawing which follows the -B line.

In the hot water tank 3 B according to this embodiment, a strainer 50 is disposed below the outlet 15. The strainer 50 has a substantially hemispherical filtering section 51.
And a flange portion 52 projecting outward from an edge of the filtering portion 51.
Is adhered to the lower surface of the peripheral portion by an adhesive.

In order to increase the adhesive strength, the outer surface of the flange portion 52 made of a mesh is fixed by caulking a metal cover or impregnated with a synthetic resin to form the hard flat portion 5.
3 is formed. Other configurations of the hot water tank 3B are the same as those in FIGS. 6 and 7, and the same reference numerals indicate the same parts. The hot water tank 3B is also incorporated in the hot water cleaning device as shown in FIG. The operation of the atmosphere release valve 30 is the same as in FIGS.

The hot water tanks 3A, 3 constructed as described above
Also in B, the foreign matter is captured by the strainer 50. Further, when the valve 2 is closed, the trapped foreign matter falls from the filtration unit 51 of the strainer 50, so that the strainer 50 is also prevented from being clogged.

[0032]

As described above, according to the hot water tank of the present invention, the outflow of foreign matter is prevented by the strainer, so that the nozzle of the hot water cleaning device operates smoothly and the hot water jet hole is also prevented from being blocked.

According to the present invention, the foreign matter caught by the strainer falls when the water stops, so that the strainer is also prevented from being clogged.

[Brief description of the drawings]

FIG. 1 is a sectional view of an outflow portion of a hot water tank according to an embodiment.

FIG. 2 is a perspective view of a strainer.

FIG. 3 is a sectional view of an outflow portion of a hot water tank according to another embodiment.

4A and 4B show a configuration of a strainer, wherein FIG. 4A is a perspective view and FIG. 4B is a cross-sectional view taken along line BB in FIG.

FIG. 5 is a system diagram of a conventional hot water washing device provided with a hot water tank.

FIG. 6 is a sectional view of an upper portion of a conventional hot water tank.

FIG. 7 is a cross-sectional view of an upper portion of a conventional hot water tank at the time of tapping.

[Explanation of symbols]

 3, 3A, 3B Hot water tank 5 Outflow part 11, 13 Cleaning nozzle 15 Outlet 16 Convex part 20 Housing 30 Atmospheric release valve 40, 50 Strainer 41, 51 Filtration part 42, 52 Flange part

Claims (3)

[Claims] 1. A hot water tank provided with an air release valve at an outlet of the hot water provided at an upper part thereof, wherein a strainer is provided upstream of the air release valve. 2. The strainer according to claim 1, wherein the strainer includes a flange portion locked to an upper edge of the outlet of the hot water tank, and a filtering portion projecting downward from the flange portion. Features a hot water tank. 3. The strainer according to claim 1, wherein the strainer includes a flange portion bonded to a lower edge of the outlet of the hot water tank, and a filtering portion protruding downward from the flange portion. And hot water tank.