JP3176027B2 - Drain structure of hot water tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drainage structure for a hot water tank. More specifically, the present invention relates to a hot water tank drainage structure in a hot water flushing device for a flush toilet, which can surely realize drainage from a hot water tank and efficiently perform the drainage.

[0002]

2. Description of the Related Art Conventionally, flush toilets have been improved in terms of sanitation as well as convenience, and a hot water washing device having a local hot water washing function, a local drying function, and the like has been developed.
For example, it has been provided as a toilet seat unit. In this hot water cleaning device, tap water is heated in a hot water tank, and hot water for local cleaning can be jetted from an injection nozzle in accordance with an external input from an operation switch.

[0003] Further, when not used due to a long absence, etc., the stored water can be drained from the hot water tank so that the water stored in the hot water tank does not freeze or the like. As a structure for draining water from such a hot water tank, the inventors of the present invention have proposed a water supply / drainage system as shown in FIG. 12, for example.

[0004] That is, in the hot water washing device, a water supply solenoid valve (1) is provided at a connection portion with a water supply, and a reserve tank (4) provided with a water supply port (2) and a waste water port (3) downstream thereof. , And a hot water tank (6) provided with a heater (5) are sequentially provided, and these are connected via a piping system. A water pump (7) is interposed in a piping system between the reserve tank (4) and the hot water tank (5) so that tap water stored in the reserve tank (4) is pumped and transferred to the hot water tank (6). I have to. Hot water tank (6)
Is further connected with a nozzle section (8) for injecting washing water toward the human body part.

[0005] A drain hole (9) is provided at the bottom of the hot water tank (6). One end of a drain pipe (10) is connected to the drain hole (9), and the other end is connected to the drain hole (9). It is connected to a water stop section (11) facing an arbitrary part leading to a flush toilet drain port.
For example, a solenoid valve, a drain cock, or the like can be employed in the water stop section (11), and the water stop section (11) is normally closed to stop water. And when draining hot water tank (6) or stored water,
The water shutoff section (11) is opened, the water pump (7) is operated while the water supply solenoid valve (1) is kept closed, and tap water stored in the reserve tank (4) is transferred to the hot water tank (6). Pump out. Thereafter, air is sucked from the waste water port (3) of the reserve tank (4), and is sent into the hot water tank (6) to increase the internal pressure thereof. The water stored in the hot water tank (6) is drained through the drain hole ( Water is drained from 9) through a drain pipe (10) and a water stop section (11). Thus, the stored water can be discharged to the flush toilet.

[0006]

For example, in the hot water tank draining structure described above, the stored water in the hot water tank (6) can be removed regardless of the position of the hot water tank (6) in the hot water washing device. Water can be drained reliably, water can be drained from the hot water tank (6) irrespective of its arrangement position, and restrictions on the structure around the hot water tank (6) are eliminated, and the hot water tank (6) can be completely removed. Even if it is covered with a casing, it has the advantage that drainage can be performed without any problem.

However, there is a problem to be solved in order to efficiently drain water from the hot water tank (6). That is, in the water draining structure described above, the water pump (7)
Since the stored water is discharged from the hot water tank (6) using the air sent in by the operation of the above, when the air escapes from the hot water tank (6), the internal pressure in the hot water tank (6) increases. And the discharge capacity of the stored water is reduced. The leakage of the air occurs when the fed air directly flows into the drain hole (9) at the bottom of the hot water tank (6).

Therefore, in order to efficiently drain the hot water tank (6), it is necessary to prevent such air from directly flowing into the drain hole (9). The present invention has been made in view of the circumstances described above, and eliminates the drawbacks of draining water from a hot water tank in a conventional hot water washing apparatus for flush toilets, thereby reliably draining water from the hot water tank. Another object of the present invention is to provide a hot water tank drainage structure that can efficiently perform the drainage.

[0009]

According to the present invention, as a means for solving the above-mentioned problems, a water supply solenoid valve is provided at a connection portion with a water supply, and a reserve tank and a hot water tank are sequentially provided downstream thereof. A water pump is interposed between the reserve tank and the hot water tank. The hot water tank is connected to a nozzle for injecting washing water toward the human body, and a drain hole is provided at the bottom to drain the water. One end of the drainage pipe is connected to the drainage hole, and the other end is connected to a water stop portion facing an arbitrary portion that communicates with the flush toilet drain port. By opening the water stop portion, the stored water in the hot water tank is drained. In the hot water washing device, the drainage hole is formed at a position far from an end opening of a water supply pipe inserted from a reserve tank,
There is provided a water draining structure for a hot water tank, wherein a partition wall portion is provided on a bottom inner surface of the hot water tank at least at a terminal opening side of a water supply pipe around a drain hole.

Hereinafter, the drainage structure of the hot water tank according to the present invention will be described in more detail with reference to the drawings.

[0011]

FIG. 1, FIG. 2 and FIG. 3 are a plan view, a left partial sectional view and a right sectional view, respectively, showing an embodiment of a hot water tank drainage structure according to the present invention. These Figure 1,
The hot water washing device (21) shown in FIGS. 2 and 3 is integrated with the flush toilet (22) and is built in the back of the toilet.
The hot water washing device (21) has a water supply / drainage system similar to that shown as a conventional example in FIG.

That is, a water supply solenoid valve (23) is provided at a connection portion with the water supply, and a downstream side thereof is provided with a reserve tank having a water supply port and a waste water port and a hot water tank (24) having a heater in order. These are connected via a piping system. Reserve tank and hot water tank (24)
A water pump (25) is interposed in the piping system between the hot water tank (2) and the tap water stored in the reserve tank.
4). Hot water tank (24)
Is further connected to a nozzle section (26) for injecting washing water toward a human body part. This hot water tank (24)
Is installed at a position lower than the rim (27a) of the flush toilet (22).

The hot water tank (24) has a drain hole (28) projecting downward at the bottom thereof. One end of a silicone hose (29) as a drain tube is connected to the drain hole (28), and the other end is connected to a manually operable drain cock (30) as a water stop portion. The drain cock (30) is connected to the hot water washing device (2).
1) A water supply port (22) formed near the outer shell (31) on the left side of the main body of the flush toilet (22) and formed on the upper surface of the rim water supply connection (27b) connected to the rim (27a). 32a). Water inlet (32a)
Cleans the flush water that is also used for discharging waste, etc.
A water supply pipe (32b) provided as a water channel for supplying to 2) is a portion into which the water supply pipe (32b) is inserted. The water supply pipe (32b) is branched from the water supply / drainage system of the hot water washing device (21) and directly connected to tap water. ing.

The drain cock (30) is provided with an operating lever (33), which is opened when the operating lever is upright, and is closed and shut off when tilted sideways. . A lid (34) that can be freely opened and closed is provided in the outer shell (31) immediately adjacent to the drain cock (30). The lid (34) normally hides the drain cock (30) without exposing it to the outside and maintains its appearance, while allowing the drain cock (30) to be easily opened when the drain cock (30) is operated. ing.

The drain cock (30) is normally closed, but when draining the stored water from the hot water tank (24), the lid (34) is opened and the drain cock (30) is operated. It is opened by raising the lever part (33). In this state, when the drain switch provided on the remote controller, the flush toilet (22) main body or the like is operated, the water pump (2) is kept in a state where the water supply solenoid valve (23) is closed.
Only 5) operates, and the tap water in the reserve tank is pumped out and transferred to the hot water tank (24). After the reserve tank is emptied, air is sucked from the waste water port and sent to the hot water tank (24) in the same manner. Then
The internal pressure of the hot water tank (24) rises, and accordingly, the stored water flows from the drain hole (28) at the bottom through the silicone hose (29) and the drain cock (30) to the water supply port (3).
2a). And the rim water supply connection (27
After passing through b), the water is sent to the rim (27a), and discharged from the flush hole formed in the bottom of the rim into the bowl (35) of the flush toilet (22).

After a certain period of time, the water pump (2)
The operation of 5) is stopped, and the drainage of the hot water tank (24) is completed. Therefore, no matter where the hot water tank (24) is placed in the hot water washing device (21), the hot water tank (2)
4) The stored water inside can be drained reliably, and the hot water tank (24) can be drained regardless of the arrangement position. Even when the hot water tank (24) is installed at a lower position of the hot water washing device (21), the water can be drained without any trouble.

In addition, the restriction on the structure around the hot water tank (24) is eliminated, space can be saved, and a compact hot water washing device (21) can be realized. Furthermore, even if the hot water tank (24) is completely covered by the outer shell (31), drainage can be performed without any problem. In addition, the drain cock (30) as a water stop part can be replaced with an electromagnetic valve. In this case, the solenoid valve is electrically connected to a control unit of the hot water washing device (21), and its operation is controlled by the control unit. Toilet bowl (2
2) It can be automatically opened according to an external input such as a drain switch provided on the main body or the like. For this reason,
A flush toilet (22) and a lid (34) on the outer shell (31) of the main body.
There is no need to provide a water drain cock (30), and an automatic operation is realized instead of a manual operation as in the case of the drain cock (30). This contributes to simplification of the device structure and improvement of operability and convenience.

FIGS. 4, 5 and 6 are an enlarged perspective view and a sectional view, respectively, showing the periphery of the drain cock. The drain cock (30) is provided with an operation lever (33) rotatable around a horizontal axis. The operation lever portion (33) is disposed in a storage portion of the deodorizing cassette (36) of the deodorizing device attached to the hot water cleaning device (21), and improves operability and prevents dirt from adhering. I have.

That is, a deodorizing duct (37) is provided in the vicinity of a shell (31) forming the left side surface of the hot water washing device (21).
Is formed, and a deodorizing cassette (36) is housed therein so as to be freely drawn out. Deodorant cassette (36)
Has a built-in deodorant (38a), and as shown in FIG.
On the bottom surface, a mesh vent (38b) communicating with the deodorizing duct (37) is formed. When the deodorizing device is operated, the air in the bowl (35) is sucked from the odor suction port facing the bowl (35) of the flush toilet (22), and the inside of the deodorizing cassette (36) is discharged from the ventilation port (38b). pass.
At this time, the odor in the air is removed by the deodorant (38a). In front of the deodorizing cassette (36), a handle (3
9) is provided, and a deodorant cassette (3
6) is easy to take out.

A guide (40) for guiding the insertion of the deodorant cassette (36) is provided at the bottom edge of the deodorant duct (37), so that the insertion of the deodorant cassette (36) can be performed smoothly. Easy going. Such a deodorant duct (3
In the upper part of 7), for example, the temperature control section (4
1) can be installed. Generally, a sub-switch unit such as the temperature control unit (41) is provided with a flush toilet (2).
In many cases, the operation lever (33) is disposed at a position that is easily seen from a standing position of a person, and thus has excellent operability.

The main body of the drain cock (30) is fixed to the outside of the deodorizing duct (37) by screws. On the other hand, the operation lever portion (33) penetrates the wall surface of the deodorizing duct (37), and its horizontal rotation axis is connected to the deodorizing cassette (36).
It is provided in the deodorizing duct (37) so as to be positioned flush with or slightly lower than the guide portion (40). Normally, the deodorizing cassette (36) is installed in the deodorizing duct (3).
7), and the lid (34) is closed. At this time, the operation lever portion (33) is tilted sideways and is disposed below the deodorizing cassette (36), so that it is not exposed to the outside and does not impair the appearance. In this state, the drain cock (30) is closed and stops water as described above.

On the other hand, a hot water tank (2
In the case of draining in step 4), the lid (34) is opened, and then the deodorizing cassette (36) is pulled out. Then, the operation lever portion (33) is raised, and the drain cock (30) is opened. Next, when water is input through a water drain switch provided on a remote controller, a flush toilet main body, or the like, the water pump (25) is operated, and the water stored in the hot water tank (24) is drained by the drain cock ( The water is discharged from the lower end of 30) through the water supply port (32a) to the rim water supply connection portion (27b).

At the time of draining operation of the hot water tank (24),
In this way, since the lid (34) is opened and the deodorizing cassette (36) is pulled out, when the warm water washing device (21) is operated normally by mistake, the operator easily notices it and takes an immediate action. be able to. When the drain cock (30) is closed, the procedure described above can be performed in the reverse order. However, the horizontal rotation axis of the operation lever (33) is connected to the guide of the deodorizing cassette (36). Since it is arranged flush with (40) or at a slightly lower position, by inserting the deodorant cassette (36) into the deodorant duct (37),
At the back of the deodorizing cassette (36), the operation lever (3
3) can be pushed down, and the operation lever part (3
The drain cock (30) can be easily closed without tilting 3). After this, if the lid (34) is closed, it returns to the original state. Operability is good.

In order to efficiently drain the hot water tank (24), the hot water tank (24) has a structure as shown in the sectional view and plan view of FIGS. The hot water tank (24) includes a frame divided vertically into two, and the lower frame has a configuration as shown in FIGS. 8 and 9. In the hot water tank (24), the terminal opening of the water supply pipe inserted from the reserve tank is arranged in the dashed-dotted circle (A) shown in FIG. On the other hand, hot water tank (24)
The drainage hole (28) at the bottom is located on the opposite side so as to be far from the terminal opening of the water supply pipe. In addition, a rib (42) is provided around the drain hole (28) so as to surround the drain hole (28) so as to rise from the inner surface at the bottom of the hot water tank (24), thereby forming a partition wall. Thus, the rib (42) isolates the drainage hole (28) on the side where the terminal opening of the water supply pipe from the reserve tank is arranged. On the other hand, the side facing the inner wall surface of the hot water tank (24) on the side opposite to the terminal opening of the water supply pipe is notched.

For example, in the hot water tank (24) having the above structure, as shown in FIG. 11, at the time of draining water, the water supply pipe (4) is operated by the operation of the water pump (25).
When air (44) is sent in from (3), the air (44) is supplied to the drain hole (2) by the rib (42).
8) is prevented from flowing directly. Air (44)
Stops reliably inside the warm water tank (24) and raises the internal pressure. Therefore, the stored water (45) stored in the hot water tank (24) flows out of the drain hole (28) preferentially. As a result, the drainage efficiency is stably maintained and improved, and the hot water performance of the hot water tank (24) does not decrease at all. Reliable and highly efficient drainage of the stored water (45) in the hot water tank (24) is realized.

Of course, the present invention is not limited by the above examples. It goes without saying that various aspects are possible for the detailed structure of the warm water washing device and the flush toilet.

[0027]

As described above in detail, according to the present invention, when draining the hot water tank in the hot water washing apparatus for flush toilets, the air supplied from the reserve tank is prevented from being released, and the internal pressure of the hot water tank is reliably increased. be able to. The drainage of the hot water tank is performed reliably and efficiently.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a hot water tank drainage structure according to the present invention.

FIG. 2 is a left partial sectional view of the example of FIG. 1;

FIG. 3 is a right sectional view of the example of FIG. 1;

FIG. 4 is an enlarged perspective view showing the periphery of a drain cock.

FIG. 5 is an enlarged perspective view showing the periphery of a drain cock.

FIG. 6 is an enlarged sectional view showing the periphery of a drain cock.

FIG. 7 is a perspective view showing a deodorant cassette.

FIG. 8 is a sectional view showing a hot water tank.

FIG. 9 is a plan view of the example of FIG. 8;

FIG. 10 is an enlarged sectional view of a main part of the example of FIG. 8;

11 is a cross-sectional view schematically showing a state at the time of drainage in the example of FIG.

FIG. 12 is a block diagram illustrating a water supply / drainage system of the hot water cleaning device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water supply solenoid valve 2 Water supply port 3 Waste water port 4 Reserve tank 5 Heater 6 Hot water tank 7 Water pump 8 Nozzle part 9 Drain hole 10 Drain pipe 11 Water stop part 21 Hot water washing device 22 Rinse toilet 23 Water supply solenoid valve 24 Hot water Tank 25 Water pump 26 Nozzle part 27a Rim 27b Rim water supply connection part 28 Drain hole 29 Silicone hose 30 Drain cock 31 Outer part 32a Water supply port 32b Water supply pipe 33 Operation lever part 34 Cover 35 Bowl 36 Deodorant cassette 37 Disappearance Odor duct 38a Deodorant 38b Ventilation port 39 Handle 40 Guide part 41 Water temperature control part 42 Rib 43 Water supply pipe 44 Air 45 Stored water

──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Nishizaki, Investigator, Kazuma, Kazuma, Osaka 1048, Matsushita Electric Works, Ltd. 72) Inventor Hirotoshi Nagaoka 1048 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (56) Reference: Hikaru 4-15676 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB (Name) E03D 9/08

Claims (2)

(57) [Claims] 1. A water supply solenoid valve is provided at a connection portion with a water supply, a reserve tank and a hot water tank are sequentially provided on a downstream side thereof, and a water pump is interposed between the reserve tank and the hot water tank. Is connected to a nozzle for injecting washing water toward the human body part, is provided with a drain hole at the bottom, one end of a drain pipe is connected to the drain hole, and the other end is washed with water. In a hot water washing device that is connected to a water stop portion facing an arbitrary portion that communicates with a toilet drain port and drains water stored in the hot water tank by opening the water stop portion, the drain hole is inserted from a reserve tank. Formed at a position distant from the terminal opening of the water supply pipe, and provided on the bottom inner surface of the hot water tank at least at the terminal opening side of the water supply pipe around the drain hole. Hot water tank Drainage structure. 2. The reservoir tank has a waste water port. When the water shut-off portion is opened when draining the hot water tank, the water pump is operated with the water supply solenoid valve closed, and the water stored in the reserve tank is discharged. Pump water into the hot water tank, then drain the reserve tank and inhale air from the water outlet,
2. The drainage structure for a hot water tank according to claim 1, wherein the water is sent to the hot water tank to increase the internal pressure, whereby the water stored in the hot water tank is drained from the drain hole through the drain pipe and the water stop portion.