JP2001145570A - Hot water serving pot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably prevent the flowout of hot water from a spout when a pot fall down. SOLUTION: In a shut-off valve unit 10 provided on the upper end of a hot water spout 9, by pressing a valve 29, into the periphery of which an O-ring 30 is fitted, against a conical valve seat 23 by the urging force of a spring 32, the valve is closed, and when serving hot water, the rising pressure of hot water opens the valve. When the valve is closed after hot water is served, hot water remaining upward of the valve seat 23 flows downward through inverted conical water passing holes 25. In case the pot falls down, closing by ring-shaped sheets 37 and the shape of the water passing holes 25 themselves prevent hot water from leaking backward, whereby outflow of hot water can be prevented even if the pot falls down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hot water supply pot,
More specifically, the present invention relates to a water stopping mechanism for preventing hot water from flowing out of a spout when a hot water supply pot falls.

[0002]

2. Description of the Related Art As an example of a conventional hot water supply pot, water stored in a container is heated and boiled by a heater to keep the temperature warm. There is known a configuration in which hot water is extended substantially vertically from the bottom of the container into a tapping pipe arranged and discharged from a spout provided at an upper end of the tapping pipe.

[0003] In such a hot water supply pot, if hot water flows out of the spout when the water falls, the surrounding area is wetted. Therefore, even if the water falls, a so-called water stop mechanism is provided so that the hot water does not leak from the water spout. I have. As a conventional water stopping mechanism, for example, those described in JP-A-7-16153 and JP-A-5-293045 are known. The water stopping mechanism according to the former is configured such that a substantially inverted conical valve body is movably disposed in a valve chamber having a valve seat also having a substantially inverted conical surface, and when the pot falls, the valve separated from the valve seat is disposed. The upper surface of the body blocks the water channel on the valve chamber upper surface, thereby preventing hot water from reaching the spout at the end of the water channel. Further, the water stop mechanism described in the latter realizes the same operation by a spherical valve.

[0004]

However, in the water stopping mechanism of the conventional construction, when the pot is turned over, the water channel is incompletely closed depending on the direction of the turning over, and a small amount of hot water leaks from the spout. Problem. Also,
Some of the hot water sucked up at the time of hot water supply remains in the water channel between the water stop mechanism and the spout. Even if the water channel is completely blocked by the water stop mechanism when the pot falls, the water remains in the water channel. There is also a problem that leaked water leaks outside. Further, a water stop mechanism using both the conical valve and the spherical valve as described above has also been put into practical use, but this also does not completely prevent the leakage of hot water when the pot falls, and furthermore, the water stop mechanism itself is not used. Another problem is that the volume is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to provide a water stoppage system having a simple structure and capable of reliably preventing the outflow of hot water when falling. It is to provide a hot water supply pot provided with a mechanism.

[0006]

Means for Solving the Problems and Embodiments of the Invention
Means for Solving the Problems The present invention made to solve the above-mentioned problem provides a container for storing hot and cold water, and a substantially upright shape in which one end is connected to a lower part of the container and the other end communicates with a spout provided in an upper part. A water passage, a water pumping means for pushing up hot water in a container into the water passage at the time of hot water supply, and a water stop valve provided in the middle of the water passage to prevent the water from flowing out of the spout when the water falls. In the hot water supply pot, the water stop valve includes: a) a valve seat formed on an inner wall of the water passage; and b) a water seat accommodated above the valve seat and rising in the water passage when hot water is supplied. An upwardly moving valve element; and c) an elastic member in the water passage that urges the valve element against the valve seat.

Here, the pumping means may be an electric pump or a bellows for increasing the internal pressure by sending air into an upper space in the container.

In the hot water supply pot according to the present invention, when hot water is not supplied, for example, when the pump is stopped, no water pressure is applied to the valve body, so that the valve body is pressed against the valve seat by the urging force of the elastic member. Closed. When the pump is operated to supply hot water, hot water sucked from the container rises in the water passage, and the valve element is pushed by the pressure of the rising hot water, and the valve element is pressed against the urging force of the elastic member. Away from the valve seat. As a result, the water stop valve opens, and the hot water reaches the spout and is discharged. Even when hot water in the container flows into the water passage when the vehicle falls, the water pressure applied to the valve body at that time is much smaller than that during hot water supply. Therefore, the water stop valve is kept closed, and the outflow of hot water from the spout is prevented. Preferably, the elastic member urges the valve body along the central axis of the water passage, and presses the valve body against the valve seat. According to this, the valve body is pressed against the valve seat with a substantially uniform force around the central axis of the water passage when the water stop valve is closed, so that the water stop valve can be securely closed regardless of the overturn direction. More effective.

Further, in the hot water supply pot according to the present invention, a configuration is provided in which a tapered water passage hole having a large opening area on the upper side and a smaller opening area on the lower side is provided through the valve seat or the valve body. It is preferable that That is, according to this configuration, when the hot water supply is stopped, the hot water remains in the water passage between the water stop valve and the spout, but this water is lower than the water stop valve through the water hole. Flow down the side waterway little by little. For this reason, after a while after the hot water supply was stopped, there was no hot water in the water passage between the water stop valve and the spout, and even if the pot was overturned, the remaining water was discharged from the spout. No leakage. Further, since the opening area of the water hole is smaller on the lower side, even if the pot falls, it is possible to prevent the hot water from leaking to the spout side through the water hole.

Further, in the hot water supply pot according to the present invention, the water passage hole is provided in the valve seat, and is movable in a water passage between a lower end face of the valve seat and a predetermined gap from the end face. It is preferable to adopt a configuration in which a flat plate member having a ring shape is inserted. That is, when the water shutoff valve is open, the flat plate member has no function. When the hot water is not supplied and the pot is in a normal standing state, the flat plate member is lowered by gravity, and a predetermined gap is formed between the flat plate member and the valve seat. It does not interfere with hot water flowing down through the holes. When the pot falls over, the flat plate member is pushed by the hot water flowing from the container side and closely adheres to the valve seat to close the lower opening of the water hole. Therefore, leakage of hot water can be more reliably prevented even through the water holes.

[0011]

In the hot water supply pot according to the present invention, the water passage is completely closed by the water shutoff valve except during hot water supply. Can be reliably prevented from flowing out. Further, at a point in time after the hot water supply has been stopped, since there is no water in the water passage between the water stop valve and the spout, leakage of hot water at the time of falling can be almost completely prevented. Furthermore, the water shutoff valve of the hot water supply pot according to the present invention is small and excellent in space saving.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hot water supply pot according to the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the entire configuration of the hot water supply pot of this embodiment. The housing that covers the outside is composed of a main body 1 and a lid 2 that covers the upper part of the housing so that it can be opened and closed.
A cylindrical container 3 with a bottom is provided inside the main body 1. The upper opening of the container 3 is closed by an inner plug 4 provided on the lower surface of the lid 2 when the lid 2 is closed.
The lid portion 2 is provided with a vapor discharge hole 5 which is opened to the container 3 through the inner plug 4 and the other is opened to the atmosphere. A heater 6 and a temperature sensor 7 are provided immediately below the bottom wall of the container 3, whereby the water in the container 3 can be boiled. A pump 8 is provided between the bottom wall of the container 3 and the bottom wall of the main body 1, and the hot water sucked from the container 3 by the pump 8 moves upward along the front side wall of the container 3. It is sent out to the extending tapping pipe 9. A water stop valve unit 10 for preventing hot water from flowing out when the pot falls over is attached to an upper end of the tapping pipe 9, and a pouring pipe 11 communicating with a pouring port 12 is connected to a distal end thereof. Although not shown in FIG. 1, the steam discharge hole 5 is also provided with an appropriate water stopping mechanism for preventing hot water from flowing out.

The hot water supply pot of this embodiment is characterized by the structure of the water shutoff valve unit 10. FIG. 2 shows a water shutoff valve unit 1
0 is a longitudinal sectional view, and FIG. 3 is a sectional view taken along line AA ′ in FIG. The water stop valve unit 10 includes a lower case 21 and an upper case 22 forming a valve chamber 20, a substantially annular valve seat member 23 fixed inside the lower case 21, and a valve stem 31.
, A cylindrical coil spring 32 inserted into the valve rod 31, and fixed between the lower case 21 and the upper case 22 so that the valve rod 31 is slidable. It comprises a valve stem holding member 33 that holds and fixes one end of the spring 32, and a ring-shaped sheet 37. In this example, the spring 32 is made of stainless steel and the O-ring 3
Other than 0 is made of silicone rubber, other parts are molded products made of polypropylene resin, but the material is not limited to this.

The valve chamber 20 formed by the lower case 21 and the upper case 22 has a substantially cylindrical shape at the center thereof, and both ends are narrowed to a substantially conical shape, and are connected to the tapping pipe 9 and the pouring pipe 11, respectively. It is supposed to be. The valve body member 28 is formed by integrally forming a substantially disc-shaped valve body 29 and a cylindrical valve rod 31, and an O-ring 30 for securing water tightness when the valve is closed is fitted around the valve body 29. Has been inserted.
The valve seat member 23 has a conical valve seat 24 that is in contact with the valve body (actually, the O-ring 30). ) Conical water holes 25 are drilled. Here, the larger opening area of the water passage hole 25 is referred to as the upper opening surface 2.
6. The smaller opening surface is referred to as a lower opening surface 27.

[0015] As shown in FIG.
An annular rim 34, three arms 35 radially extending on the inner peripheral side of the rim 34, held by the arm 35,
Boss 36 having through hole for slidably holding valve stem 31
Are integrally formed. In addition, the ring-shaped sheet 37
Is accommodated below the valve seat member 23 in the upper cylinder of the lower case 21 and can be slightly moved up and down within the upper cylinder.

Hereinafter, the function of the water shutoff valve unit 10 in the hot water supply pot of this embodiment will be described. When the pump 8 is stopped, no water pressure is applied to the valve body 29 of the water stop valve unit 10 from below, so that the valve body member 28 is strongly pressed against the valve seat 24 by the urging force of the spring 32. As described above, since the O-ring 30 is fitted around the valve body 29, extremely high watertightness is maintained by the close contact between the O-ring 30 and the valve seat 24.

FIG. 4 is a sectional view showing the state of the water shutoff valve unit 10 at the time of hot water supply. When the user presses a hot water supply button (not shown), the pump 8 is operated, and the hot water sucked from the container 3 is delivered to the tapping pipe 9 at a predetermined delivery pressure. Thereby, the hot water rises in the tapping pipe 9. Then, since the water pressure on the tapping pipe 9 side is higher than the urging force of the spring 32 that presses the valve body 29, the valve body member 28 is pushed up by this water pressure, and the valve body 29 (O-ring 30) becomes a valve seat. Separated from 24. Thereby, the pushed hot water passes through the valve chamber 20 as shown by the arrow in FIG. 4, reaches the pouring port 12 via the pouring pipe 11 and is discharged to the outside.

When the pressing of the hot water supply button is released, the pump 8 is stopped. As a result, the discharge of hot water from the spout 12 stops. Further, since the pressure of the hot water rising in the tapping pipe 9 is eliminated, the valve body member 28 is pushed down by the urging force of the spring 32, and the valve body 29 (O-ring 30) comes into close contact with the valve seat 24. That is, the water stop valve closes. Hot water already existing above the valve body member 28 when the valve is closed cannot flow downward due to the closure of the valve and remains.
However, even when the O-ring 30 is in close contact with the valve seat 24, the upper side and the lower side of the valve chamber 20 communicate with each other through the water hole 25 with the valve body member 28 interposed therebetween. At this time,
As shown in FIG. 2, since the ring-shaped sheet 37 is moved downward by gravity, the ring-shaped sheet 37 does not close the lower opening surface 27 of the water passage hole 25. Therefore, water remaining above the valve member 28 gradually flows downward through the water passage hole 25, and after a while, there is no water remaining above.

FIG. 5 is a sectional view showing a state of the water stop valve unit 10 when the pot is overturned. If the pot falls, the hot water stored in the container 3 may flow into the tapping pipe 9, and the hot water may push the valve member 28. However, the water pressure at that time is much smaller than the delivery pressure of the pump 8 and does not reach a level that overcomes the urging force of the spring 32. Therefore, even if the pot falls over, the valve body 29 is maintained in a state of being in close contact with the valve seat 24. Further, as described above, the lower side and the upper side (the left side and the right side in FIG. 5) of the valve chamber 20 communicate with each other via the water hole 25, but when the pot falls over, the ring-shaped sheet 37 is pushed into the hot water. Then, it moves so as to be in close contact with the valve seat member 23 (or by the momentum at the time of falling), and closes the lower opening surface 27 of the water passage hole 25. Furthermore, even if this blockage is insufficient, the water hole 2
Since 5 has a conical shape, a larger air pressure acts on the upper side having a large opening, and there is almost no possibility that water will flow backward from the lower side to the upper side through the water passage hole 25. Therefore, the hot water does not leak from the spout 12 even when the pot is overturned.

If the pot falls over immediately after the hot water supply, that is, before the water remaining between the valve body member 28 and the spout 12 flows completely downward through the water passage hole 25, the pot may fall. The remaining hot water will leak out. However, since the water shutoff valve is in a completely closed state as described above, after a certain amount of hot water has leaked, the hot water leaking is almost completely stopped. On the other hand, in the above-mentioned conventional water stopping mechanism, since the water stopping at the time of falling is incomplete, as long as the pot is falling, forever (in an extreme case, the water in the container 3 almost disappears). Hot water continues to leak gradually. Therefore, in the pot according to this embodiment, the damage of the surroundings can be reduced as compared with the related art.

The above embodiment is merely an example, and it is apparent that changes and modifications can be made within the spirit of the present invention. For example, in the above embodiment, a pump is used as the water pumping means, but the present invention is also applied to a so-called air type pot, in which the air pressure in the upper space in the container is increased to send the hot water in the container into the tapping pipe and raise it. it can. That is, if it is a configuration in which hot water is sent out into the tapping pipe by some means, the inside of the tapping pipe is raised and discharged from the upper spout to the outside,
The present invention can be applied.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire configuration of a hot water supply pot according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a water stop valve unit of the hot water supply pot of the present embodiment.

FIG. 3 is a sectional view taken along line A-A ′ in FIG. 2;

FIG. 4 is a sectional view showing a state of a water stop valve unit at the time of hot water supply.

FIG. 5 is a cross-sectional view showing a state of the water stop valve unit when the pot falls.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Container 8 ... Pump 9 ... Hot water pipe 10 ... Water stop valve unit 11 ... Spout pipe 12 ... Spout 20 ... Valve chamber 21 ... Lower case 22 ... Upper case 23 ... Valve seat member 24 ... Valve seat 25 ... Water hole 26 upper opening surface 27 lower opening surface 28 valve body member 29 valve body 30 O-ring 31 valve stem 32 spring 33 valve stem holding member 34 rim 35 arm 36 boss 37 ring seat

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor: Yukiyuki Hagiwara 11-2 Kamitoba Hokodatemachi, Minami-ku, Kyoto F-term in Art Heaven Nine Co., Ltd. 3L034 AA01 AB03 4B055 AA35 BA01 CA12 CA69 CB09 DB02

Claims (3)

[Claims] 1. A container for storing hot and cold water, a substantially vertically extending water passage having one end connected to a lower portion of the container and the other end communicating with a spout provided at an upper portion, and In a hot water supply pot comprising: a water pumping means for pushing hot water into the water passage; and a water stop valve provided in the middle of the water passage to prevent the water from flowing out of the spout when the water falls. A) a valve seat formed on the inner wall of the water passage; and b) a valve body housed above the valve seat and moved upward by water pressure rising in the water passage when hot water is supplied, c) an elastic member in the water passage that urges the valve body to press the valve body against the valve seat. 2. A tapered water passage hole, which has a large opening area on the upper side and a small opening area on the lower side, is provided through the valve seat or the valve body. The hot water pot described. 3. The valve according to claim 1, wherein the water hole is provided in the valve seat.
The hot water supply pot according to claim 2, wherein a flat plate member having a ring shape and being movable in a water passage between a lower end surface of the valve seat and a predetermined gap from the end surface is inserted.