GB2171496A - Branch valve for toilet bowl with showering nozzle - Google Patents
Branch valve for toilet bowl with showering nozzle Download PDFInfo
- Publication number
- GB2171496A GB2171496A GB08524787A GB8524787A GB2171496A GB 2171496 A GB2171496 A GB 2171496A GB 08524787 A GB08524787 A GB 08524787A GB 8524787 A GB8524787 A GB 8524787A GB 2171496 A GB2171496 A GB 2171496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- showering
- toilet bowl
- nozzle
- water
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/01—Control of flow without auxiliary power
- G05D7/0146—Control of flow without auxiliary power the in-line sensing element being a piston or float without flexible member or spring
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Sanitary Device For Flush Toilet (AREA)
- Multiple-Way Valves (AREA)
Abstract
A branch valve for a toilet bowl with a showering nozzle has an inlet (18) communicating with a water source, outlets (12, 14) communicating with a water tank for flushing a toilet bowl and with the showering nozzle for a showering operation respectively, and a branch chamber formed within a valve casing (17) of the branch valve (11) which enables the inlet (18) and the outlets (12, 14) to communicate with each other therein. According to the invention, a spool (13) held by a cylindrical spool holder (20) is provided within the branch chamber for controlling the mode of communication of water within the inlet and the outlets. The opening area (S1) of the spool holder (20) on the side of the outlet (14) is made larger than the opening area (S2) of the spool holder (20) on the side of the outlet (12), whereby the spool (13) and the spool holder (20) are adapted to always preferentially allow the outlet (14) to communicate with the inlet (18) to discharge water to the nozzle during the simultaneous use of the toilet bowl flushing and the showering operation. <IMAGE>
Description
SPECIFICATION
Branch valve for toilet bowl with showering nozzle
The present invention relates to a branch valve for a toilet bowl with a showering nozzle, for distributing water to a flushing water tank and a showering nozzle.
The conventional branch valve of this type has an inlet communicating with a water supply pipe, an outlet communicating with a watertank for reserving water for flushing a toilet bowl, an outlet communicating with the showering nozzle for showering parts of a human body, and a branch chamber formed within a valve casing of the branch valve to enable the inlet and the outlets to communicate with each other therein.
With such a branch valve, however, the supply pressure of the water flowing through two outlets varies depending on the mode of the toilet bowl flushing and/or that of the showering operation, and hence a person engaged in the showering operation is obliged to adjust the discharge rate of the nozzle every time by adjusting the discharge rate adjusting plug. Namely, when the toilet bowl flushing and the showering operation are executed separately, the respective supply pressures for the toilet bowl flushing and for the showering operation are equal to a supply pressure at the inlet.However, when the toilet bowl flushing and the showering operation are executed simultaneously, since the water supplied through the inlet is distributed to the outlets, the respective supply pressures at the outlets drops below the supply pressure, namely, the supply pressures prevailing at the outlets when the toilet bowl flushing and the showering operation are executed separately.
Accordingly, in the simultaneous execution of the toilet bowl flushing and the showering operation, the flow rate of the water for showering the body parts drops, and hence a discharge rate adjusting plug for adjusting the discharge rate of the nozzle must be adjusted.
Furthermore, if only the showering operation is executed with the discharge rate adjusting plug adjusted for the simultaneous execution of the toilet bowl flushing and the showering operation, the discharge rate of the nozzle becomes excessive, because the supply pressure for the showering operation is restored to the supply pressure, and hence the discharge rate adjusting plug must be adjusted again. Essentially, with such a conventional branch valve, a troublesome adjustment of the discharge rate of the nozzle is required at every showering operation.
It is an object of the present invention to provide a branch valve for toilet bowl with a showering nozzle, in which the above disadvantages in the conventional branch valve are eliminated, and capable of supplying water at a fixed flow rate to the showering nozzle even upon the simultaneous operation of the toilet bow flushing and the showering operation.
According to the present invention there is disclosed a branch valve for a toilet bowl with a showering nozzle, having an inlet communicating with a water supply pipe, an outlet communicating with a water tank for reserving water for flushing a toilet bowl an outlet communicating with said showering nozzle for a showering operation and a branch chamber formed within a valve casing of said branch valve so as to enable the inlet and the outlets to communicate with each other therein, characterized in that, the branch valve comprises, a spool held by a cylindrical spool holder for controlling the mode of communication of water within said inlet and outlets, said spool and said spool holder being disposed within said branch chamber; the opening area of said spool holder on the side of said outlet communicating with the showering nozzle being larger than the opening area of said spool holder on the side of said outlet communicating with said water tank; and whereby said spool and said spool holder are adapted to always preferentially allow said outlet to communicate with said inlet so as to discharge water to the nozzle upon the simultaneous use of the toilet bowl flushing and showering operation.
In a preferred embodiment of the invention the inside configuration of the spool holder is formed in the shape of a conical cavity.
Figs. 1 to 6 illustrate an embodiment of the present invention, in which:
Figure 1 is a longitudinal sectional view of a branch valve in a toilet bowl flushing mode;
Figure 2 is a sectional view taken along line
C-C of Fig. 1;
Figure 3 is a longitudinal sectional view of the branch valve in a simultaneous toilet bowl flushing and showering mode;
Figure 4 is a sectional view taken along line
D-D of Fig. 3;
Figure 5 is a longitudinal sectional view of the branch valve in a showering mode; and
Figure 6 is a sectional view taken along line
E-E of Fig. 5.
Figs. 7 to 9 illustrate a conventional branch valve, in which:
Figure 7 is a front elevation of the branch valve;
Figure 8 is a sectional view taken on line
A-A of Fig. 7; and
Figure 9 is a sectional view taken along line
B-B of Fig. 7.
For a better understanding of the present invention, a conventional branch valve for distributing water to a flushing water tank and a showering nozzle is hereinafter described with reference to the attached drawings Figs. 7 through 9.
As indicated in the drawings, a valve casing 1 comprises an inlet 2 and outlets 3 and 4.
The inlet 2 and the outlet 3 communicate with a water supply pipe and a flushing water tank (hereinafter referred to simply as "tank") respectively. The axes of inlet 2 and the outlet 3 are aligned in a straight line, and water supplied through the water supply pipe is always able to flow into the tank. The outlet 4 communicates with a showering nozzle (hereinafter referred to simply as "nozzle"). A branch chamber 5 communicating with the inlet 2 and the outlets 3 and 4 is formed jn the valve casing 1. A discharge rate adjusting plug 7 for adjusting the flow rate of the water to be supplied to the nozzle is provided opposite to a hole 6 formed in a partition wall partitioning the outlet 3 communicating with the tank and the branch chamber 5.A strainer 9 for straining the water is provided in a hole 8 formed in a partition wall partitioning the branch chamber 5 and the outlet 4 communicating with the nozzle.
When the water accumulated in the tank is flushed to the toilet bowl to flush away stools in the toilet bowl (hereinafter this operation is referred to as "toilet bowl flushing") and the quantity of the water in the tank decreases, and a ball tap is opened to introduce water into the tank. Consequnetly, the pressure prevailing in the outlet 3 approaches the atmospheric pressure, and then the water supplied from the water supply pipe starts flowing through the inlet 2 and the outlet 3 into the tank. When only the nozzle is used for showering parts of the human body (hereinafter this operation is referred to as the "showering operation"), the pressure prevailing in the outlet 4 approaches the atmospheric pressure, and thereby the water starts flowing through the inlet 2, the branch chamber 5 and the outlet 4 into the nozzle.
When both the toilet bowl flushing and the showering operation are executed simultaneously, the pressures in both the outlets 3 and 4 approach atmospheric pressure, and hence the water is supplied simultaneously through the inlet 2 for both the toilet bowl flushing and the showering operation.
With such a branch valve 10, however, the supply pressure of the water flowing through the outlets 3 and 4 varies, depending on the mode of the toilet bowl flushing and/or that of the showering operation, and hence a person engaged in the showering operation is obliged to adjust the discharge rate of the nozzle every time by adjusting the discharge rate adjusting plug 7. Namely, when the toilet bowl flushing and the showering operation are executed separately, the respective supply pressures for the toilet bowl flushing and for the showering operation are equal to a supply pressure P at the inlet 2.However, when the toilet bowl flushing and the showering operation are executed simultaneously, since the water supplied through the inlet 2 is distributed to the outlets 3 and 4, the respective supply pressures at the outlets 3 and 4 drop below the supply pressure P, namely, the supply pressures prevailing at the outlets 3 and 4 when the toilet bowl flushing and the showering operation are executed separately. Supposing that the supply pressure of the water to be supplied to the nozzle is P1, then P1 is lower than P.
Accordingly, in the simultaneoous execution of the toilet bowl flushing and the showering operation, the flow rate of the water for the showering operation drops, and hence a discharge rate adjusting plug 7 for adjusring the discharge rate of the nozzle must be adjusted.
Furthermore, if only the showering operation is executed with the discharge rate adjusting plug adjusted for the simultaneous execution of the toilet bowl flushing and the showering operation, the discharge rate of the nozzle becomes excessive, because the supply pressure for the showering operation is restored to the supply pressure P, and hence the discharge rate adjusting plug 7 must be adjusted again.
Essentially, with such a conventional branch valve, troublesome adjustment of the discharge rate of the nozzle is required at every showering operation.
Such a variation of the flow rate occurs also in the tank, however, this variation of the flow rate merely causes a variation in the time required to supply a fixed quantity of water to the tank. Therefore, such a variation of the flow rate is not a practical problem since this variation is within an allowable range.
A preferred embodiment of the invention will now be described in detail with reference to the accompanying drawings.
As illustrated in Figs. 1 and 2, a valve casing 17 of a branch valve 11 is provided with an inlet 18 connected to a water supply pipe (not shown), at the bottom of the casing 17, and is provided with an outlet 14 connected to a nozzle (not shown), at the center thereof.
An outlet 12 connected to a tank (not shown) is provided at the top of the valve casing 17 at a position opposed to the inlet 18. This embodiment is different from the conventional branch valve illustrated in Figs. 8 and 9 in that the inlet 18 and the outlet 12 communicate by means of a first branch chamber 19 instead of communicating directly with each other.
A spool 13 provided at the opposite ends thereof with valve elements 15 and 16 is held by a spool holder (hereinafter referred to simply as "holder") 20 within the branch chamber 19. The holder 20 is a cylindrical member having a valve seat 21 for the valve element 15 at one end thereof, the other end of the holder 20 is screwed into the valve casing 17 and is closed with a cap 22. A plurality of inlet ports 23 and outlet ports 24 are formed in the circumferential wall of the holder 20 to communicate with the inlet 18 and the outlet 12, respectively. Indicated at 25 is a valve seat formed in the inner surface of the holder 20 for the taper valve element 16. The holder 20 is slightly tapered so that the openings at each end of the holder 20 have different diameters.Namely, as shown in the drawings, the opening area S, on the left is larger than the opening area S2 on the right.
The first branch chamber 19 communicates with a second branch chamber 27 through a connecting hole 26. The second branch chamber 27 communicates with the outlet 14 for the nozzle through a connecting hole 28. Indicated at 29 is a discharge rate adjusting plug disposed opposite to the connecting hole 26, and indicated at 30 is a strainer fitted in the connecting hole 28. The purposes of these members are similar to those of the corresponding members of the conventional branch valve.
The modes of operation of the branch valve 11 constituted by the present invention will be described hereinafter.
First, a toilet bowl flushing mode will be desribed in connection with Figs. 1 and 2. In this mode, the nozzle operating passage is closed, the tank operating passage is opened, and the water accumulated in the tank is flushed into the toilet bowl, and hence the ball tap opens with the result that the outlet 12 communicates with the atmosphere. Accordingly, the pressure in the outlet 12 approaches atmospheric pressure. Consequently, the balance between the forces acting on the valve elements 15 and 16 of the spool 13 is destroyed and the spool 13 moves to the right as viewed in the drawings. In more detail, in the toilet bowl flushing mode, a back pressure acts on a surface 1 5a of the valve element 15 on the side of the connecting hole 26, while a water supply pressure P acts on a surface
15b of the valve element 15 on the side of the inlet 18.In this case, the forces acting on the opposite sides of the valve element 15, respectively, may be presumed to be the same. On the contrary, with the valve element
16, the water supply pressure P acts on a tapered surface 1 6a of the valve element 16 and a pressure approximately the same as the atmospheric pressure actson the back face 1 6b of the valve element 16, and thus the valve element 16 is urged to the right. That is, the spool 13 is urged to the right and thus is shifted to the right. Consequently, the valve element 15 is opened and the valve element
16 is closed, and the supply water flows only into the tank. Thus the branch valve 11 distributes jthe water selectively.
A mode of operation in which the showering operation is started during the toilet bowl flushing will be described hereinafter in connection with Figs. 3 and 4. Upon the start of the showering operation, the pressure in the outlet 14 for the nozzle approaches atmospheric pressure, and hence the back pressure acting on the surface 15a of the valve element 15 of the spool 13 is removd. Accordingly, the supply pressure alone acts on both the surface 15b of the valve element 15 and the tapered surface 16a of the valve element 16 of the spool 13, in opposite directions respectively.As previously described, since the opening area S, of the holder 20 is larger than the opening area S2 of the same, the force urging the spool 13 to the left, as viewed in the drawings, is greater than the force urging the same to the right, and hence the spool 13 starts moving to the left from the position illustrated by imaginary lines to the position illustrated by continuous lines. As illustrated by the continuous lines, the taper surface 16a is seated on the valve seat 25 of the holder 20, where the spool 13 remains stable. That is, in a mode where the toilet bowl flushing and the showering operation are executed simultaneously (including a case in which the toilet bowl flushing is started first and a case in which the showering operation is started first), the water supply to the tank is stopped and water is supplied only to the nozzle.Accordingly, the adjustment of the discharge rate adjusting plug for adjusting the discharge rate of the nozzle at every showering operation, which is the usual practice with the conventional branch valve, becomes unnecessary.
Fig. 5 and 6 illustrate a showering operation mode. In this mode, the ball tap of the tank is closed and the supply pressure P acts on the tapered surface 16a of the valve element 16 of the spool 13, while a back pressure acts on the back face 16b of the same. In this mode also, it may be presumed that the forces acting on the valve element 16 in opposite directions, respectively, are the same.
On the other hand, a pressure nearly equal to the atmospheric pressure acts on the surface 1 5a of the valve element 15, while the supply pressure P which is higher than the atmospheric pressure acts on the surface 15b of the same, and hence a force urging the valve element 15 to the left is greater than the opposing force by a differential corresponding to the supply pressure P. That is, the spool 13 is urged to the left, as viewed in the drawings, by the supply pressure P acting on the surface 15b of the valve element 15 and is held stably after the tapered surface 1 6a of the valve element 16 has seated in the valve seat 25. Consequently, the outlet 12 communicating with the tank is closed and water is supplied through the outlet 14 only to the nozzle.
As apparent from the above description, according to the present invention, when the toi let bowl flushing and the showering operation are executed separately, water is supplied separately for the toilet bowl flushing and for the showering operation, while water is always supplied preferentially for the showering operation in the simultaneous toilet bowl flushing and showering operation mode. Ac cordingly, the discharge rate of the showering nozzle is not affected by the toilet bowl flushing, and hence the discharge rate adjusting plug for adjusting the discharge rate of the nozzle need not be adjusted at every showering operation, which enables the showering operation device to be used without inconvenience.
It is obvious to those skilled in the art that the present invention is not limited to the embodiment stated in the foregoing description and that various changes and modifications may be made in the invention without departing from the spirit and scope thereof.
Claims (2)
1. A branch valve for a toilet bowl with a showering nozzle, having an inlet communicating with a water supply pipe, an outlet communicating with a water tank for reserving water for flushing a toilet bowl, an outlet communicating with said showering nozzle for a showering operation and a branch chamber formed within a valve casing of said branch valve so as to enable the inlet and the outlets to communicate with each other therein, characterized in that, the branch valve comprises, a spool held by a cylindrical spool holder for controlling the mode of communication of water within said inlet and outlets, said spool and said spool holder being disposed within said branch chamber; the opening area of said spool holder on the side of said outlet communicating with the showering nozzle being larger than the opening area of said spool holder on the side of said outlet communicating with said water tank; and whereby said spool and said spool holder are adapted to always preferentially allow said outlet to communicate with said inlet so as to discharge water to the nozzle upon the simultaneous use of the toilet bowl flushing and showering operation.
2. The branch valve of Claim 1, wherein the inside configuration of the spool holder is formed in the shape of a conical cavity.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3819885A JPS61215867A (en) | 1985-02-27 | 1985-02-27 | Branch valve for shower toilet |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8524787D0 GB8524787D0 (en) | 1985-11-13 |
| GB2171496A true GB2171496A (en) | 1986-08-28 |
| GB2171496B GB2171496B (en) | 1988-12-29 |
Family
ID=12518649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08524787A Expired GB2171496B (en) | 1985-02-27 | 1985-10-08 | Branch valve for toilet bowl with showering nozzle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS61215867A (en) |
| GB (1) | GB2171496B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392903B (en) * | 2011-09-28 | 2013-03-20 | 捷锐企业(上海)有限公司 | Gas travel switch valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0094229A1 (en) * | 1982-05-08 | 1983-11-16 | Dereve (Flow Controls) Limited | Fluid flow control valve |
-
1985
- 1985-02-27 JP JP3819885A patent/JPS61215867A/en active Pending
- 1985-10-08 GB GB08524787A patent/GB2171496B/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0094229A1 (en) * | 1982-05-08 | 1983-11-16 | Dereve (Flow Controls) Limited | Fluid flow control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61215867A (en) | 1986-09-25 |
| GB8524787D0 (en) | 1985-11-13 |
| GB2171496B (en) | 1988-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921008 |