JP2020105885A - Flush toilet bowl - Google Patents

Abstract

To provide a flush toilet bowl capable of suppressing out-of-machine leaks due to water overflow from a tank and increasing the flow rate of washing water discharged from a rim discharge port.SOLUTION: A hybrid flush toilet bowl 1 according to the present invention comprises a water supply channel 16 to which washing water is supplied from the tap under direct pressure, a rim side water supply channel 36 which supplies the washing water in the water supply channel to a rim discharge port 10 under direct pressure, a tank side water supply channel 40 which splits off from the rim side water supply channel 36 on the downstream side of the supply channel and feeds the washing water to a tank 38, a flow path switcher 34 which switches the flow path to at least one of the rim side water supply channel or tank side water supply channel, a jet side water supply channel 50 that supplies the washing water in the tank to a jet discharge port 12, and a pressurizing pump 48 that pressurizes the washing water in the tank to the jet discharge port. The flow path switcher or the tank side water supply channel is provided with a flow rate control unit 42 that regulates a flow rate Q3 of the washing water flowing into the tank to be less than a maximum flow rate Q4 of the washing water discharged at the rim discharge port.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet bowl, and more particularly to a hybrid flush toilet bowl that is flushed with flush water directly supplied from a tap and flush water supplied from a tank.

Conventionally, as a flush toilet of a cleaning system (so-called "hybrid cleaning type") in which cleaning is performed with cleaning water directly supplied from tap water and cleaning water supplied from a tank, it has been described in Patent Document 1. Something like is known.
The conventional hybrid flush-type flush toilet described in Patent Document 1 described above includes a water supply passage through which flush water is supplied from the tap water at a direct pressure. A rim-side water supply passage for supplying water to the rim spout of the toilet body and a tank-side water supply passage for supplying water to the tank are provided at the downstream branch portion of the water supply passage. Further, a jet side water supply passage for supplying water to the jet water outlet of the toilet body is provided on the downstream side of the tank.
Further, a switching valve is provided at the branch portion on the downstream side of the water supply channel. With this switching valve, the flow path on the downstream side of the water supply channel can be switched to either the rim side water supply channel or the tank side water supply channel, or to both the rim side water supply channel and the tank side water supply channel. You can do it.

JP, 2009-7854, A

Further, in recent years, in order to improve the design of flush toilets, there is a demand for so-called "low silhouette", in which the upper end of the entire toilet body incorporating a tank for storing flush water is designed as low as possible. It is rising.
On the other hand, in the conventional flush toilet described above, in order to realize a low silhouette, the tank itself is designed to be arranged at the lowest possible height position, or the shape of the tank has a top end height. Should be designed to be as low as possible.
In addition, when the height of the tank itself is designed to be low in this way, in order to prevent external leakage due to water overflow from the tank, wash water on the tank side (clean water) and dirty water on the toilet body side (sewage) It is preferable to set a lower boundary line (also called a “critical line”) between and to ensure safety.

However, since such a critical line is determined by a plurality of factors such as the amount of flush water supplied to the toilet body and the discharge performance (overflow performance) of the tank overflow pipe, etc., it can be easily set low. There is a problem that you can not.
Furthermore, if the toilet bowl is made into a low silhouette without setting the critical line low, there is a problem that water leakage outside the machine is likely to occur.
Also, in order to prevent water overflow from the tank, if the flow rate is too low in the upstream water supply channel that supplies water to the tank side water supply channel, the flow rate of wash water supplied to the rim side water supply channel will be too low. Is also low limited. As a result, the flow rate of spouted water (rim spouted water) from the rim spouting port becomes low, and there is also a problem that the cleaning performance in the bowl of the toilet body may also deteriorate.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and suppresses water leakage outside the machine due to water overflow from the tank and increases the flow rate of cleaning water discharged from the rim spout. The purpose is to provide a flush toilet that can be compatible.

In order to solve the above-mentioned problems, the present invention is a flush toilet flushed with flush water directly supplied from tap water and flush water supplied from a tank,
A bowl body, a toilet body provided with a rim spouting port and a jet spouting port for flushing water, and a drain trap pipe, a tank for storing flushing water supplied to the jet spouting port, and A water supply channel provided on the upstream side and supplied with wash water at a direct pressure from the tap, an opening/closing valve for opening and closing the water supply channel, and a downstream side of the water supply channel for cleaning water in the water supply channel. A rim side water supply channel for supplying water to the rim spout with direct pressure, and a tank side for branching the rim side water supply channel at a branch portion on the downstream side of the water supply channel to supply cleaning water in the water supply channel to the tank A water supply channel and a flow path switching unit that is provided at a branch portion of the water supply path and switches a downstream side flow path to at least one of the rim side water supply path or the tank side water supply path, and the tank. A jet side water supply passage provided on the downstream side for supplying the cleaning water in the tank to the jet spout, a pressurizing pump for pressurizing the cleaning water in the tank to the jet spout, the on-off valve, The flow path switching unit, and a control unit for controlling the operation of each of the pressurizing pump, and, in the flow path switching unit or the tank side water supply passage, from the tank side water supply passage into the tank. It is characterized in that a flow rate regulating unit is provided to regulate the flow rate of the inflowing cleaning water so as to be smaller than the maximum flow rate of the cleaning water spouted from the rim side water supply passage at the rim spout.
In the present invention thus configured, since the flow rate control unit is provided in the flow path switching unit or the tank-side water supply passage, the rim-side water supply is performed with respect to the flow rate of the wash water flowing into the tank from the tank-side water supply passage. It can be regulated so as to be smaller than the maximum flow rate of the wash water spouted from the road at the rim spout.
Therefore, it is possible to achieve both suppression of water leakage outside the machine due to water overflow from the tank and high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port.

In the present invention, preferably, the flow rate restricting portion is a constant flow valve provided in the tank side water supply passage.
In the present invention thus configured, the constant flow valve is provided in the tank side water supply passage as a flow rate regulating portion, so that the rim spouting port can be used for the flow rate of the wash water flowing into the tank from the tank side water supply passage. The flow rate can be regulated so that it is smaller than the maximum flow rate of the wash water discharged in.
Therefore, it is possible to effectively achieve both suppression of water leakage outside the machine due to water overflow from the tank and high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port.

In the present invention, preferably, the flow rate regulating portion is a throttle portion having a flow passage cross-sectional area provided in the tank side water supply passage.
According to the present invention thus configured, the flow rate of the washing water flowing into the tank from the tank-side water supply passage is provided by the throttle portion of the flow passage cross-sectional area being provided as the flow-rate restricting portion in the tank-side water supply passage. Can be regulated by narrowing down so as to be smaller than the maximum flow rate of the wash water spouted at the rim spout.
Therefore, it is possible to effectively achieve both suppression of water leakage outside the machine due to water overflow from the tank and high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port.

In the present invention, preferably, further has a water level detection unit provided in the tank to detect the water level in the tank, the control unit, the tank based on the information detected by the water level detection unit Controls the water supply from the side water supply channel to the tank, and the water supply channel is used on the upstream side for energization when it is energized and the energization water channel used for energization. The water supply channel for a power outage is provided, and the water supply channel for a power outage has a maximum flow rate of wash water flowing from the water supply channel for a power outage through the tank side water supply channel into the tank during a power outage. A flow restriction unit for power failure is sometimes provided so as to regulate the flow amount so as to be smaller than the maximum flow rate of the wash water flowing into the tank from the energization water supply passage.
According to the present invention having such a configuration, during energization, the energization water supply channel is used by the control of the control unit, and the water supply to the tank is controlled based on the information of the water level detection unit.
Therefore, it is possible to effectively achieve both suppression of water leakage outside the machine due to water overflow from the tank and high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port.
Further, the flow rate of wash water to be supplied to the tank can be increased when power is applied, compared to when a power failure occurs.
On the other hand, at the time of a power failure, the control section cannot control the water supply to the tank based on the detection information of the water level detection section, so the water supply channel for a power failure is used.
At this time, regarding the flow rate of the water supply channel for power failure, the maximum flow rate of wash water flowing from the water supply channel for power failure to the tank by the power flow restriction section for power failure is the wash water flowing into the tank from the water channel for energization when energized. Can be regulated to be smaller than the maximum flow rate.
Therefore, even when the control unit cannot control the water supply to the tank based on the detection information of the water level detection unit at the time of power failure, it is possible to reliably suppress the external water leakage due to the water overflow from the tank. ..
In addition, the flow rate of wash water supplied to the tank can be increased when electricity is applied, compared to during power failure, while at the time of power failure, the minimum flow rate of wash water in the tank is required for toilet bowl cleaning. be able to.

According to the flush toilet of the present invention, it is possible to achieve both suppression of external leakage due to water overflow from the tank and high flow rate of flush water discharged from the rim spout.

1 is an overall configuration diagram of a flush toilet according to a first embodiment of the present invention. It is a whole block diagram of the flush toilet according to 2nd Embodiment of this invention.

Next, a flush toilet according to the first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is an overall configuration diagram of a flush toilet according to a first embodiment of the present invention.
In the following description, the term "flow rate" used in the expression "flow rate of washing water" and the like means the volume change [L/min] per unit time (so-called "volume flow rate"). Or "instantaneous flow rate").
First, as shown in FIG. 1, the flush toilet 1 according to the first embodiment of the present invention is washed with flush water directly supplied from tap water and flush water supplied from a tank (details will be described later). It is a hybrid flush type flush toilet. The flush toilet 1 includes a toilet body 2 and a functional portion 4 incorporated in the rear of the toilet body 2.
Next, the toilet body 2 extends from the bowl portion 6 that receives the dirt, the rim portion 8 above the bowl portion 6, the rim spout 10 and the jet spout 12 that discharge the cleaning water, and the bottom of the bowl portion 6. And a drain trap pipe line 14.
The rim spout 10 is formed on a part of the inner peripheral surface of the rim portion 8 and discharges the cleaning water along the upper edge of the bowl portion 6.
Further, the jet water spouting port 12 is formed at the bottom of the bowl portion 6 so as to discharge the washing water toward the inlet 14 a of the drain trap pipeline 14.

Next, as shown in FIG. 1, the functional unit 4 is provided with a water supply passage 16 to which the cleaning water is directly supplied from the tap water.
The water supply passage 16 is provided with a water stop plug 18, an energization water supply passage 20 and a power failure water supply passage 22 from the upstream side.
A constant flow valve 24 and a solenoid valve 26 (open/close valve) are provided in the energization water supply passage 20.
Further, a constant flow valve 28 and a manual valve 30 are provided in the water supply passage 22 for power failure.

In addition, in the present embodiment, since the solenoid valve 26 (open/close valve) of the energization water supply passage 20 does not operate at the time of power failure, the user manually operates the manual valve 30 of the power supply water passage 22 to open. It can be made to speak.
At this time, the constant flow valve 28 of the water supply channel 22 for power failure functions as a flow rate restriction unit for power failure that regulates the flow rate [L/min] of the water supply channel 22 for power failure during power failure.
As a result, the maximum flow rate Q1 [L/min] of wash water flowing from the water supply channel 22 for power outage through the tank side water supply channel 40 into the tank 38 at the time of power outage is from the water supply channel 20 for energization to tank side water supply channel when energized. It becomes smaller than the maximum flow rate Q2 [L/min] of the wash water flowing into the tank 38 via 40 (Q1<Q2).
In addition, in this embodiment, the manual valve 30 of the water supply passage 22 for a power failure will be described as a mode in which it is opened and closed by a user's manual operation during a power failure. It may be in a form of being opened and closed by an emergency power supply.

Next, as shown in FIG. 1, the valve device 32 and the switching valve device 34 (the flow path switching unit) are provided in the water supply passage 16 on the downstream side of the energization water supply passage 20 and the power outage water supply passage 22 of the functional unit 4. ) Are provided respectively.
Further, on the downstream side of the switching valve device 34, a rim-side water supply passage 36 for supplying the cleaning water that has passed through the switching valve device 34 to the rim spout 10 of the toilet body 2 is provided.

Next, the functional unit 4 has a built-in tank 38 that stores the wash water for supplying water to the jet spout 12 of the toilet body 2.
A tank-side water supply passage 40 for supplying the cleaning water that has passed through the switching valve device 34 to the tank 38 is provided on the downstream side of the switching valve device 34. The tank-side water supply passage 40 branches off in the switching valve device 34 independently of the rim-side water supply passage 36.
Here, the switching valve device 34 includes a switching valve (not shown) provided in a branch portion that branches the rim-side water supply passage 36 and the tank-side water supply passage 40 on the downstream side of the water supply passage 16, for example, three-way. Valves are used. With such a switching valve (not shown), the cleaning water can be supplied to both the rim side water supply passage 36 and the tank side water supply passage 40 at the same timing, and the ratio of the amount of water supplied to the rim side and the tank side can be adjusted. It can be changed arbitrarily.
That is, the switching valve device 34 is a flow path that can switch the downstream side flow path to at least one of the rim side water supply path 36 and the tank side water supply path 40 at the downstream branch portion of the water supply path 16. It functions as a switching unit.

Next, a constant flow valve 42 (flow control unit) is provided in the middle of the tank side water supply passage 40. As a result, the flow rate Q3 [L/min] of the wash water flowing into the tank 38 from the tank side water supply passage 40 becomes smaller than the maximum flow rate Q4 [L/min] of the wash water discharged at the rim water discharge port 10. Thus, the flow rate can be regulated at a constant flow rate (Q3<Q4).

Next, as shown in FIG. 1, in the tank 38 of the functional unit 4, an upper float switch 44 and a lower float switch 46, which are water level detectors for detecting the water level in the tank 38, are provided.
A pressurizing pump 48 and a jet side water supply passage 50 are provided on the downstream side of the tank 38, respectively. The washing water in the tank 38 is pressurized by the pressurizing pump 48 and is supplied to the jet spout 12 from the jet side water supply passage 50.

Further, the function unit 4 has a controller 52 (control unit) built therein, and the controller 52 allows the solenoid valve 26 (open/close valve), the valve device 32 (open/close valve), and the switching valve device 34 (flow path switching unit). ), and the operation of each of the pressurizing pumps 48 is controlled.
For example, the controller 52, when energized, is operated by the user by operating a toilet flush switch (not shown), so that the solenoid valve 26 (open/close valve), the valve device 32 (open/close valve), the switching valve device 34 (flow path switching unit). ), and the pressurizing pump 48 are sequentially operated to discharge the water from the rim water discharge port 10 and continue the rim water discharge, and then start the water discharge from the jet water discharge port 12 to wash the bowl portion 6. It is supposed to do.
Further, the controller 52 stops the pressurizing pump 48 when the water level in the tank 38 drops to a predetermined water level slightly higher than the minimum water level and the lower float switch 46 switches from off to on.
After the cleaning is completed, the controller 52 switches the switching valve device 34 (flow path switching unit) to the tank side water supply passage 40 with the solenoid valve 26 (open/close valve) opened, and supplies the cleaning water to the tank 38. It is supposed to do.
Further, when the water level in the tank 38 rises and the upper float switch 44 detects a prescribed amount of stored water, the controller 52 closes the electromagnetic valve 26 (open/close valve) to stop water supply.

Next, the operation of the flush toilet 1 according to the first embodiment of the present invention described above will be described.
First, according to the flush toilet 1 according to the present embodiment, the tank side water supply passage 40 is provided with the constant flow valve 42 as a flow regulating portion. As a result, the flow rate Q3 [L/min] of the wash water flowing from the tank side water supply passage 40 into the tank 38 is smaller than the maximum flow rate Q4 [L/min] of the wash water spouted at the rim spout 10. Can be regulated to a constant flow rate.
Therefore, it is possible to effectively achieve both the suppression of water leakage outside the machine due to water overflow from the tank 38 and the high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port 10.

Further, according to the flush toilet 1 according to the present embodiment, during energization, the energization water supply passage 20 is used under the control of the controller 52 (control section), and information of each float switch 44, 46 (water level detection section) is used. Based on the above, the water supply to the tank 38 is controlled.
Therefore, it is possible to effectively achieve both the suppression of water leakage outside the machine due to water overflow from the tank 38 and the high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port 10.
On the other hand, at the time of power failure, the controller 52 cannot control the water supply to the tank based on the information of the float switches 44 and 46, so that the water supply path 22 for power failure is used.
At this time, the constant flow valve 28 for power failure (flow rate restriction unit for power failure) restricts the flow rate [L/min] of the water supply channel 22 for power failure, so that the tank side water supply from the water supply channel 22 for power failure The maximum flow rate Q1 [L/min] of wash water flowing into the tank 38 via the passage 40 is the maximum flow rate Q2 [L] of wash water flowing from the energization water supply passage 20 to the tank 38 via the tank side water supply passage 40 when energized. /Min].
Therefore, even if the controller 52 cannot control the water supply to the tank 38 based on the detection information of the float switches 44 and 46 at the time of power failure, the leakage of water from the tank 38 due to the water overflow can be surely ensured. Can be suppressed.
In addition, the flow rate of the wash water supplied to the tank 38 can be increased when the power is on, compared with the time of the power outage. L/min] can be secured.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIG.
Here, in the flush toilet 100 according to the second embodiment of the present invention shown in FIG. 2, the same parts of the flush toilet 1 according to the first embodiment of the present invention shown in FIG. The description of is omitted.
As shown in FIG. 2, in the flush toilet 100 according to the present embodiment, in the tank-side water supply passage 140, the structure in which the narrowed portion 142 of the flow passage cross-sectional area is provided as the flow regulating portion is the above-described embodiment of the present invention. It is different from the constant flow valve 42 of the tank side water supply passage 40 of the flush toilet 1 according to the first embodiment.

According to the flush toilet 100 according to the present embodiment described above, since the tank side water supply passage 140 is provided with the narrowed portion 142 of the flow passage cross-sectional area as the flow rate restricting portion, the tank side water supply passage 140 is provided inside the tank 38. The flow rate Q3 [L/min] of the inflowing wash water can be regulated by being narrowed down so as to be smaller than the maximum flow rate Q4 [L/min] of the wash water spouted at the rim water outlet 10.
Therefore, it is possible to effectively achieve both the suppression of water leakage outside the machine due to water overflow from the tank 38 and the high flow rate of the cleaning water (rim water discharge) discharged from the rim water discharge port 10.

In addition, in the flush toilet 1 according to the first embodiment of the present invention and the flush toilet 100 according to the second embodiment described above, the constant flow valve 42 and the flow path cutoff are provided in the tank side water supply passages 40 and 140 as the flow rate control unit. Although the form in which each of the area narrowing parts 142 is provided has been described, other forms of the flow rate regulating part are also applicable.
That is, as another mode of the flow rate control unit, a mode in which a pressure regulating valve or the like for adjusting the flow passage cross-sectional area is provided in each of the tank side water supply passages 40 and 140 may be used, or the switching valve device 34 (flow passage). The switching valve itself of the passage switching unit) may be configured to regulate the flow rate [L/min] by adjusting the opening degree of the water supply passage 16 or the tank side water supply passages 40 and 140.

1 Flush toilet according to the first embodiment of the present invention 2 Toilet body 4 Functional part 6 Bowl part 8 Rim part 10 Rim spout port 12 Jet spout port 14 Drain trap line 14a Drain trap line inlet 16 Water supply line 18 Water stop Plug 20 Water supply channel for energization 22 Water supply channel for blackout 24 Constant flow valve 26 Solenoid valve (open/close valve)
28 Constant flow valve (flow restriction unit for power failure)
30 Manual valve 32 Valve device (open/close valve)
34 Switching valve device (flow path switching unit)
36 Rim Side Water Supply Channel 38 Tank 40 Tank Side Water Supply Channel 42 Constant Flow Valve (Flow Rate Controlling Section)
44 Upper float switch (water level detector)
46 Lower float switch (water level detector)
48 pressurizing pump 50 jet side water supply channel 52 controller (control unit)
100 flush toilet according to the second embodiment of the present invention 140 tank side water supply passage 142 narrowed portion of flow passage cross-sectional area Q1 maximum flow rate [L/ min]
Q2 Maximum flow rate [L/min] of washing water flowing from the energization water supply channel to the tank through the tank side water supply channel
Q3 Flow rate of wash water [L/min] flowing into the tank from the tank side water supply channel
Q4 Maximum flow rate [L/min] of wash water spouted at the rim spout

Claims (4)

A flush toilet flushed with flush water directly supplied from tap water and flush water supplied from a tank,
A toilet body including a bowl portion, a rim water discharge port and a jet water discharge port for discharging cleaning water, and a drain trap pipeline,
A tank for storing the wash water supplied to the jet spout,
A water supply passage that is provided on the upstream side of the toilet body and is supplied with washing water from the tap water under direct pressure,
An on-off valve that opens and closes the water supply channel,
A rim-side water supply passage that is provided on the downstream side of the water supply passage and supplies the wash water in the water supply passage to the rim spout with direct pressure,
A tank-side water supply path that branches with the rim-side water supply path at the downstream branch of the water supply path and supplies the cleaning water in the water supply path to the tank.
Provided at the branch portion of the water supply passage, a flow passage switching unit that switches the flow passage on the downstream side to at least one flow passage of the rim side water supply passage or the tank side water supply passage,
A jet side water supply passage which is provided on the downstream side of the tank and supplies the cleaning water in the tank to the jet spout,
A pressurizing pump for pressurizing the cleaning water in the tank to the jet spout,
A control unit that controls the operation of each of the on-off valve, the flow path switching unit, and the pressurizing pump;
The flow rate of the cleaning water flowing into the tank from the tank side water supply channel to the flow path switching unit or the tank side water supply channel is the maximum flow rate of the cleaning water discharged from the rim side water supply channel at the rim spout. A flush toilet characterized by being provided with a flow rate regulating portion for regulating so as to be smaller than that. The flush toilet according to claim 1, wherein the flow rate control unit is a constant flow valve provided in the tank side water supply passage. The flush toilet according to claim 1, wherein the flow rate regulating portion is a throttle portion having a flow passage cross-sectional area provided in the tank side water supply passage. Further, it has a water level detection unit provided in the tank to detect the water level in the tank, the control unit, based on the information detected by the water level detection unit from the tank side water supply channel to the tank Control the water supply of
The water supply path, on the upstream side, is provided with an energization water supply path used during energization, and a power outage water supply path branched from this energization water supply path and used during a power failure,
In the power outage for power outage, the maximum flow rate of wash water flowing from the water supply for power outage through the tank side water supply to the tank at the time of power failure flows into the tank from the water supply for energization when energized. The flush toilet according to any one of claims 1 to 3, further comprising a flow rate restriction unit for power failure that regulates the flow rate so as to be smaller than the maximum flow rate of the wash water.

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