JP3554869B2 - Hot water supply water drainage mechanism - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a hot water supply pipe for introducing hot water from a hot water supply main pipe and a hot water washing apparatus installed in a Western style toilet in a high rise building such as a hotel, and a hot water supply pipe used for a gas water supply pipe. About.
[0002]
[Prior art]
Conventionally, as shown in FIG. 8, a piping structure of a hot water washing device in a high-rise building such as a hotel has a hot water supply main pipe 46 and a hot water supply main branch 47 extending vertically from a lower floor to an upper floor. The structure is such that the mixed water faucet 52 with thermostat flows into the piping 48 and the water supply piping 49 via the check valves 50 and 51, respectively.
The water and hot water flowing from the respective inlets of the mixing faucet with thermostat 52 are mixed to the temperature of the optimal temperature water by a temperature sensing part (not shown) in the mixing faucet with thermostat 52 and mixed with the optimal temperature water. The hot and cold water is depressurized by a pressure reducing valve 53 with a relief, and is passed through a safety valve 54 that closes when the temperature of the hot water rises excessively. Are branched into three flow paths. The flow paths 55 and 56 are provided with flow regulating valves 58 and 59 for adjusting the flow rate, and the flow path 57 is provided with an on-off valve 60. Reference numerals 61a to 61c indicate vacuum breakers, respectively.
[0003]
[Problems to be solved by the invention]
By the way, when performing the above-mentioned shower cleaning or charm cleaning, it is necessary to drain the remaining hot water in the pipe as initial cold water. However, in the conventional structure, the on-off valve 60 is opened and the water is drained. This is hot water after the remaining hot water in the hot water supply pipe 48 is mixed with the cold water in the hot water supply pipe 49 in the mixing faucet 52 with thermostat, and although it is originally preferable to quickly drain the remaining hot water in the hot water supply pipe 48. First, since the hot water after mixing the water supplied from the water supply pipe 49 with the remaining hot water is discarded, the temperature of the water does not easily rise, so that the amount of the water is increased, which is required for the water drainage. There was also a problem that it took a long time.
Further, when water is to be discarded, the remaining hot water in the hot water supply pipe 48 passes through a plurality of devices including a mixing faucet with thermostat 52, a pressure reducing valve 53, a safety valve 54, and an on-off valve 60. There was also a problem that cold water could not be discarded.
[0004]
[Means for Solving the Problems]
The hot water supply pipe drainage mechanism according to claim 1 of the present invention is provided with a drainage flow path switching valve having a branch pipe branching in the middle of the hot water supply pipe reaching the temperature control unit as one inflow port, A tapping line passing through a temperature control unit is connected to the other inflow port of the passage switching valve, and the passage switching valve drains the remaining hot water inside the hot water supply pipe in preference to the remaining hot water on the tapping line side. It is a mechanism to do.
[0005]
The hot water supply pipe drainage mechanism according to claim 2 of the present invention includes: a first drainage valve having a branch pipe branching in the middle of the hot water supply pipe reaching the temperature control unit as an inflow port; and the temperature control unit. And a second drain valve connected to the hot water supply pipe. The first and second water drain valves drain the remaining hot water inside the hot water supply pipe in preference to the remaining hot water on the hot water supply pipe side. The mechanism to be controlled.
[0006]
According to a third aspect of the present invention, there is provided a drainage mechanism for a hot water supply pipe, wherein a temperature sensor is disposed in the middle of the tapping line according to the first aspect, and an output of the temperature sensor causes an outflow of a drainage flow path switching valve. This is a mechanism that controls the opening and closing of the drain valve connected to the port.
[0007]
The hot water supply pipe drainage mechanism according to claim 4 of the present invention is characterized in that a first drainage valve having a branch pipe branching in the middle of the hot water supply pipe reaching the temperature control unit as an inflow port, and the temperature control unit. A second drain valve to which the passed tapping line is connected, and first and second temperature sensors for detecting the hot water temperatures on the inflow side of the first and second drain valves, respectively. Based on the detection result of the sensor, the first and second water drain valves drain the remaining hot water inside the hot water supply pipe in preference to the remaining hot water on the hot water supply pipe side, and hot water of a predetermined temperature flows out of the hot water supply pipe. Until the second drain valve is opened.
[0008]
According to a fifth aspect of the present invention, there is provided a water dispensing mechanism for a hot water supply pipe, wherein the temperature control section in the mechanism according to any one of the first to fourth aspects has a thermostat-mixed water for a hot water cleaning device which jets from a cleaning nozzle. It is a stopper.
[0009]
[Action]
In the first aspect, the hot water supply pipe is connected to the temperature control unit via the flow switching valve for draining water, so that the remaining hot water in the hot water supply pipe passes through the temperature control unit before the flow switching valve. Water is preferentially drained through. In this way, the remaining hot water in the hot water supply pipe is directly discarded without mixing with the water in the water supply pipe, so the amount of water waste can be reduced to save water and shorten the time required for water drainage. can do. Further, water can be efficiently drained without passing through a temperature control valve, a pressure reducing valve, or the like. In addition, the mixing flow rate of the thermostatic mixing faucet for a shower toilet is about 0 to 21 / min, and it is difficult to obtain a higher flow rate. In addition to the increase, the temperature stability at the time of a small flow rate is deteriorated). However, according to this mechanism, it is possible to easily discard water at a large flow rate.
[0010]
In the second aspect, the first and second drainage valves are provided in each of the branch pipe and the tapping pipe in place of the drainage flow path switching valve in the first aspect. The set temperature at which the water valve is switched between open and closed can be set not only to the same value but also to a different value, and the open / close timing of each drain valve can be arbitrarily set and controlled.
[0011]
According to the third aspect of the present invention, the water drainage operation by the water drainage flow rate switching valve can be controlled by the hot water temperature in the tapping pipeline, so that the temperature in the temperature control unit is cooled even after the water drainage operation from the branch pipeline is completed. Because of this, it is possible to discard the cold water that comes out of the tap water pipe.
[0012]
According to the fourth aspect, in addition to the operation of the third aspect, if hot water suddenly enters the temperature control section after the water draining operation from the branch pipe is completed, the temperature control characteristic at the beginning of the hot water supply is not stable. On the other hand, when hot water comes to the branch line, this problem can be prevented by opening the second drain valve of the tapping line. Then, it is confirmed that the temperature of the hot water in the tapping line detected by the second temperature sensor has reached a predetermined temperature, and the second drain valve is controlled to close.
[0013]
The hot water supply pipe drainage mechanism according to any one of claims 1 to 4 is a mechanism used for connecting a hot water washing apparatus for a toilet in a high-rise building such as a hotel.
[0014]
【Example】
Hereinafter, a drainage mechanism for a hot water supply pipe according to the present invention will be described with reference to the drawings.
1 and 2 are drawings showing a first embodiment of a hot water supply pipe drainage mechanism according to the present invention.
This hot water supply water draining mechanism is exemplified by a case where the present invention is applied to a hot water washing device installed in a Western-style toilet in a high-rise building such as a hotel.
In a hotel or the like, a hot water supply main pipe 1 and a water supply main pipe 2 extend vertically from the lower floor to the upper floor, and a hot water supply pipe 3 and a water supply pipe 4 from these main pipes 1 and 2 are used for washing hot water for a Western-style toilet in each room. It is piped to the vicinity of the device.
[0015]
A tapping line 7 extending from the water supply pipe 4 to the shower (butt washing) flow path 5 and the charm (bide wash) flow path 6 includes a mixing faucet 8 with a thermostat, a pressure reducing valve 9 with a relief, and temperature fluctuation to mitigate temperature fluctuation. It is formed via the relaxation tank 10.
[0016]
By the way, the branch pipe 11 is branched from the middle of the hot water supply pipe 3 reaching the mixing faucet 8 with thermostat, and this branch pipe 11 is connected to one inflow port 13 a of the drainage flow path switching valve 12. . To the other inflow port 13b of the flow path switching valve 12, the tapping pipe line 7 via the temperature fluctuation mitigation tank 10 is branched and connected.
The flow path switching valve 12 is a valve for draining remaining hot water remaining in the mixing faucet 8 and the piping as initial cold water, and the temperature of the remaining hot water in the hot water supply pipe 3 is lower than a predetermined temperature. At this time, the remaining hot water is allowed to flow out of the outflow port 14 to the waste water flow path 15 in preference to the hot water that is discharged through the mixing faucet 8, the pressure reducing valve 9, and the temperature fluctuation mitigation tank 10.
[0017]
Check valves 16a to 16b are provided at the inlets of the mixing faucet 8 and the flow path switching valve 12, and flow control valves 17, 18 for flow rate adjustment are provided in the shower flow path 5 and the charm flow path 6. , And an on-off valve 19 is provided in the waste water channel 15. Vacuum breakers 20a to 20c are provided in these flow paths 5, 6, and 15, respectively.
[0018]
FIG. 2 is a sectional view showing a specific structure of the flow path switching valve 12.
A main body 21 of the flow path switching valve 12 is formed of a hollow prism. A shaft 23 having a thermosensitive contraction body 22 inserted therein is screwed and fixed to a lower lid 24 at a lower portion of the main body 21. It is fixed and attached in the circumferential direction by a bracket 25. In this bracket 25, flow paths 26, 26 are formed. The shaft body 23 is further extended upward through a connecting member 27, and two valve bodies 29, 30 are attached to the upper and lower positions of the shaft body 23 with a flow path 28 communicating with the drainage side outflow port 14 interposed therebetween.
[0019]
The upper valve body 29 forms a space of an upper valve chamber 33 that communicates with the inflow port 13b between the upper lid body 31 and a valve seat 32 attached to the upper end outer edge of the flow passage 28. On the other hand, the lower valve body 30 is a lower valve that communicates with the inflow port 13a through the flow path 26 between the lower lid 24 and the valve seat 34 attached to the lower edge of the flow path 28. The space of the chamber 35 is formed.
A spring body 36 urged downward is attached between the valve seat 34 and the connecting member 27.
[0020]
In this flow path switching valve 12, until the hot water supplied through the hot water supply pipe 3 reaches a temperature close to the hot water temperature supplied to the hot water main pipe 1, the valve body 30 is biased by the spring body 36. Is separated from the valve seat 34, a flow path is formed from the inflow port 13a to the outflow port 14 through the flow paths 26 and 28. On the other hand, when the temperature of the hot water passing through this flow passage becomes close to the temperature of the hot water supplied to the hot water supply main pipe 1, the thermosensitive contraction body 22 expands against the urging force of the spring body 36, so that the valve 30 At the same time, the flow path is switched so as to be seated on the valve seat 34 to block the flow path communicating from the inflow port 13a to the outflow port 14, and at the same time to communicate from the inflow port 13b to the outflow port 14 through the flow path 28.
[0021]
In the water disposing mechanism having the above-described structure, the water and hot water flowing into the mixing faucet with thermostat 8 are mixed into the appropriate temperature water of 38 ± 2 ° C. by the temperature sensing part in the mixing faucet with thermostat 8, The hot and cold water mixed with the water is depressurized by the pressure reducing valve 9, reaches the tapping line 7 through the temperature fluctuation mitigation tank 10, and is supplied to the shower nozzle / cylinder (not shown) of the shower toilet through the flow path 5 or 6. Then, it is squirted as ass washing or bidet washing.
[0022]
On the other hand, when the mixing faucet with thermostat 8 or the flow control valves 17 and 18 are closed, the pressure in the nozzle cylinder decreases, and the shower nozzle is housed in the cylinder by the force of the return spring in the cylinder. At this time, the remaining hot water remaining in the hot water supply pipe 3, the mixing faucet 8, and the like is dead as water.
[0023]
In such a state, when washing with hot water again, the on-off valve 19 for draining water is opened in order to discard the low-temperature remaining hot water remaining in the mixing faucet 8, the hot water supply pipe 3 and the like. If the temperature of the remaining hot water remaining in the hot water supply pipe 3 is low when the on-off valve 19 is opened, the inflow port 13a and the outflow port 14 of the flow path switching valve 12 communicate with each other as described above. The remaining hot water remaining in the pipe 3 is directly discarded through the flow path switching valve 12 without passing through the mixing faucet 8.
[0024]
Then, when the temperature of the remaining hot water rises to a predetermined temperature, the communication between the inflow port 13a and the outflow port 14 is cut off in the flow path switching valve 12 as described above, and instead, the inflow port 13b and the outflow port 14 are connected. The residual water remaining in the mixing faucet 8, the pressure reducing valve 9, the temperature fluctuation mitigation tank 10 and the like is discarded through the flow path switching valve 12.
Since the remaining hot water in the hot water supply pipe 3 is not mixed with the water in the water supply pipe 4 in the mixing faucet 8 and is discarded, the amount of water discarded can be reduced to save water. And the time required for water drainage can be reduced.
[0025]
In addition, instead of the drainage flow switching valve 12 in the above-described embodiment, as shown in FIG. 3, drainage valves 37a and 37b can be connected to the tapping line 7 and the branch line 11, respectively. The specific structure of the drain valves 37a, 37b is, for example, a structure in which one of the inflow ports 13a of the flow switching valve 12 shown in FIG. 2 is closed.
In this case, hot water lower than the set temperature of the temperature-sensitive shrinkable body 38a (38b) can be discarded. As a result, there is no need to provide the on-off valve 19 for discarding water. In addition, the set temperature of the temperature-sensitive shrinkable body 38a in the water drain valve 37a on the tapping pipe line 7 and the set temperature of the temperature-sensitive shrinkable body 38b in the water drain valve 37b on the branch pipe line 11 may be set to different values. For example, even if the drainage of the branch pipe 11 is completed, low-temperature hot water is not discharged from the tap water pipe 7 due to remaining hot water in the temperature control unit such as the mixing faucet 8 with a thermostat. Can also be controlled.
[0026]
FIG. 4 is a pipeline diagram showing the second embodiment.
In the present embodiment, a temperature sensor 39 is disposed in the middle of the tapping line 7, and an automatic drainage valve 40 connected to the outflow port 14 of the drainage flow switching valve 12 is controlled to open and close by the output of the temperature sensor 39. Configuration. Other configurations are the same as those in FIG.
Thus, in the present embodiment, the drainage operation by the drainage flow switching valve 12 is finally performed by opening and closing the automatic drainage valve 40. For this reason, even when the temperature in the temperature control unit such as the mixing faucet 8 is low after the water draining operation from the branch pipe 11 is completed, the temperature of the hot water in the tapping pipe 7 detected by the temperature sensor 39 is low. Since the water is controlled to be drained, cold water remaining in the temperature control section can be reliably drained.
[0027]
5 to 7 show a third embodiment.
In this embodiment, instead of the flow rate switching valve 12 in the above-described embodiment, externally controllable drainage valves A and B are connected to the branch line 11 and the tapping line 7, respectively. The temperature sensors 41a and 41b for detecting the temperature of the hot water on the inflow side are provided respectively. Specifically, the temperature sensor 41a is provided at a branch point between the hot water supply pipe 3 and the branch pipe 11, and the temperature sensor 41b is provided in the tapping pipe 7, and a water drain valve is provided based on detection results of the temperature sensors 41a and 41b. The opening and closing of A and B are controlled.
[0028]
FIG. 6 illustrates a control circuit diagram for controlling the opening and closing of the drain valves A and B (denoted by A and B in the drawing) based on the temperature results detected by the temperature sensors 41a and 41b in FIG. FIG. 7 is a timing chart showing operation timing.
The control circuit 42 shown in FIG. 6 uses a microcomputer, and receives a signal indicating a temperature detected by the temperature sensors 41a and 41b and a signal of a start switch 44 for starting water drainage. I have. Here, the start switch 44 may be a seat switch that automatically detects that the toilet user is sitting on the toilet seat, or a manually operated water drain switch separately provided from such an automatic switch. Good.
Then, a signal for controlling the opening and closing of the drain valves A and B is output from the CPU 43, and is output to the base terminals of the transistors 45a and 45b which are loaded with solenoids for controlling the valve opening and closing of the drain valves A and B. I have.
[0029]
Thus, in FIG. 7, when the start switch 44 composed of the seating switch or the manually operated drainage switch is turned on (timing t ₁ ), the CPU 43 first controls the opening of the drainage valve A and the hot water supply pipe 3. The remaining hot water having a low temperature is drained through the branch pipe line 11. When the temperature sensor 41a detects a predetermined temperature (35 ° C. in this example) (timing t ₂ ), the water drain valve A is closed, and the water drain valve B is opened instead. Next, when the temperature sensor 41b detects the predetermined temperature (timing t ₃ ), the water drain valve B is closed. Here, a time lag between t ₃ from the timing t _2, after the water discard operation from branch pipe 11 has been completed, the temperature regulating properties of starting out with sudden fall is hot water in the mixing valve 8 is not stable However, this is to prevent this problem.
[0030]
The set temperature can be arbitrarily determined, and may be set to the same temperature or different temperatures in the water drain valves A and B. Further, in this embodiment, water discard valve A, but it is shifted from the timings t ₁ and t ₂ to open the B, which is obtained by considering the water resistance of the branch pipe 11 and the hot water pipe 7, the water resistance If the pipe structure is such that the water easily flows through the drain valve B having a large water flow, the drain valves A and B may be controlled to be opened simultaneously.
[0031]
On the other hand, in the case where the start switch 44 is operated to drain water by a seating sensor, when the detected temperatures of the temperature sensors 41a and 41b fall below a predetermined temperature, the drainage valves A and B are opened and controlled as described above, and as a result, Automatic opening and closing control is repeated according to the timing chart shown in FIG.
Here, since the temperature sensor 41b detects low tap water temperature and discards water, the water can be discarded from the shower nozzle of the hot water cleaning device instead of the water discarding valve B. Furthermore, if the opening time of the shower valve is set by a timer or the like and water is discarded for a certain period of time, the temperature sensor 41b provided for determining the timing of water drainage from the tapping line 7 can be omitted. .
[0032]
In this way, in the third embodiment, the drainage valves A and B give priority to the low-temperature remaining hot water inside the hot water supply pipe over the remaining hot water on the hot water supply pipe side according to the temperature results detected by the temperature sensors 41a and 41b. In addition to the operation of the first and second embodiments described above, when the hot water comes to the branch line, the second water drain valve of the tapping line can be opened. If the hot water suddenly enters the mixing faucet 8 after the water draining operation is completed, it is possible to solve the problem that the temperature control characteristics at the beginning of the hot water supply become unstable.
[0033]
Although the above-described embodiment illustrates an example in which the present invention is applied to a hot water washing device for a toilet, it is also applicable to an apparatus having a hot water side and a water side pipe such as a gas water heater.
In particular, in the gas water heater, a certain flow rate can be secured by preferentially discarding only the hot water side, and ignition can be reliably performed.
[0034]
【The invention's effect】
As described above, according to the present invention, the remaining hot water in the hot water supply pipe is discarded before being mixed with the water in the water supply pipe. The time required for water can be reduced. Further, even when the temperature of the hot water in the tapping line is low or unstable, the water can be effectively drained.
[Brief description of the drawings]
FIG. 1 is a pipeline system diagram showing a first embodiment of a hot water supply pipe drainage mechanism according to the present invention.
FIG. 2 is a sectional view showing a structure of a flow path switching valve in the first embodiment.
FIG. 3 is a cross-sectional view illustrating a structure of a flow path switching valve according to a modification of the first embodiment.
FIG. 4 is a pipeline system diagram showing a second embodiment.
FIG. 5 is a pipeline diagram showing a third embodiment.
FIG. 6 is a circuit diagram illustrating the configuration of a control circuit according to a third embodiment;
FIG. 7 is a timing chart showing the operation timing of the third embodiment.
FIG. 8 is a pipeline system diagram showing a conventional example.
[Explanation of symbols]
1. Hot water supply main pipe A: Water drain valve (first water drain valve)
2: Main water supply pipe B: Water drain valve (second water drain valve)
3 hot water supply pipes 41a, 41b temperature sensor 4 water supply pipe 42 control circuit 7 hot water supply pipe 8 mixed faucet with thermostat (temperature control unit)
DESCRIPTION OF SYMBOLS 11 ... Branch line 12 ... Waste water flow path switching valve 15 ... Waste water flow path 39 ... Temperature sensor 40 ... Automatic water discharge valve

Claims (5)

A drainage flow path switching valve is provided with a branch pipe branching in the middle of the hot water supply pipe reaching the temperature control section as one inflow port, and the other inflow port of the flow path switching valve has passed through the temperature control section. A hot water supply pipe draining mechanism, wherein the hot water supply pipe is connected, and the flow path switching valve drains the remaining hot water inside the hot water supply pipe prior to the remaining hot water on the hot water supply pipe side. A first water drain valve having a branch pipe branching in the middle of the hot water supply pipe to the temperature control section as an inflow port, and a second water drain valve connected to a tap water pipe passing through the temperature control section are provided. The first and second drain valves are configured to control the remaining hot water inside the hot water supply pipe with priority over the remaining hot water on the hot water supply pipe side. The temperature sensor is arranged in the middle of the tapping line, and the output of the temperature sensor controls opening and closing of a water drain valve connected to an outflow port of the water drain passage switching valve. Hot water supply pipe drainage mechanism. A first water drain valve having a branch pipe branching in the middle of the hot water supply pipe reaching the temperature control unit as an inflow port, a second water drain valve connected to a tap water pipe passing through the temperature control unit, First and second temperature sensors for detecting the temperature of the hot water on the inflow side of the first and second drain valves are provided, respectively, and the first and second drain valves are supplied with hot water according to the detection results of these temperature sensors. The remaining hot water inside the pipe is drained with priority over the remaining hot water on the tapping line side, and the second drain valve is controlled to open until hot water of a predetermined temperature flows out of the tapping line. Water supply pipe drainage mechanism. The water supply mechanism according to any one of claims 1 to 4, wherein the temperature control unit is a thermostatically-equipped mixing faucet for a hot water washing device ejected from a washing nozzle.

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