Siphon drainage system

Abstract

To provide a siphon drainage system capable of reducing the time until a siphon is activated.SOLUTION: A siphon drainage system comprises: a siphon drainage pipe configured to include a lateral pipe provided on a downstream side in a drainage direction of a water fixture and extending in a lateral direction, and a vertical pipe extending downward from a downstream end of the lateral pipe; a detection device that detects discharge of drainage from the water fixture; an on-off valve provided at an intermediate part of the vertical pipe and capable of retaining drainage on an upstream side; and a control device that controls the on-off valve based on a drainage discharge detection result detected by the detection device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a siphon drainage system.

Background Art

[0002] As a siphon drainage system, for example, the siphon drainage system described in Patent Document 1 is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The siphon drain pipe is composed of a horizontal pipe and a vertical pipe that generates siphon force due to the fall of drainage. However, when the horizontal pipe becomes long, it takes time for the drainage from the water-using appliance to start and for the siphon force to be generated, that is, for the siphon to start up. Therefore, there is room for improvement.

[0005] In consideration of the above facts, the present disclosure aims to provide a siphon drainage system capable of shortening the time until the siphon starts up.

Means for Solving the Problems

[0006] The siphon drainage system according to the first aspect includes a siphon drain pipe provided on the downstream side in the drainage direction of the water-using equipment and composed of a horizontal pipe extending horizontally and a vertical pipe extending downward from the downstream end of the horizontal pipe, a detection device for detecting the discharge of drainage from the water-using equipment, an on-off valve provided at an intermediate portion of the vertical pipe and capable of storing the drainage upstream, and a control device for controlling the on-off valve based on the drainage discharge detection result detected by the detection device.

[0007] In the siphon drainage system according to the first aspect, it is possible to set the initial state as a state in which the on-off valve is closed and the drainage corresponding to the water head capable of generating siphon force is stored in the vertical pipe. In this siphon drainage system in the initial state, when drainage is discharged from the plumbing equipment, the detection device detects the discharge of the drainage.

[0008] When the discharge of the drainage is detected by the detection device, the control device can set the on-off valve to the open state based on the drainage discharge detection result.

[0009] When the on-off valve is set to the open state, the drainage in the vertical pipe drops, and siphon force is generated immediately after the start of drainage. Therefore, the drainage discharged from the plumbing equipment can be quickly and efficiently discharged using the siphon drainage pipe.

[0010] In this way, in this siphon drainage system, by storing drainage in the vertical pipe in advance, siphon force is generated without waiting for the time for the drainage from the plumbing equipment to pass through the lateral draw-off pipe, and the time until the siphon starts can be shortened regardless of the length of the lateral draw-off pipe.

[0011] Further, in this siphon drainage system, when the drainage from the plumbing equipment ends and the detection device no longer detects the drainage from the plumbing equipment, the control device can set the on-off valve to the closed state. As a result, although the drainage from the plumbing equipment has ended, drainage remains in at least the vertical pipe of the siphon drainage pipe 14 and a part of the lateral draw-off pipe.

[0012] In this way, when the on-off valve is set to the closed state and the state where drainage remains in the vertical pipe of the siphon drainage pipe and a part of the lateral draw-off pipe is maintained, a water head for generating the siphon force required at the next drainage discharge is secured in the vertical pipe.

[0013] Therefore, next, when drainage is discharged from the drain outlet of the plumbing fixture, as described above, the detection device detects that the drainage has been discharged from the drain outlet of the plumbing fixture, the control device opens the on-off valve, and the drainage in the vertical pipe that has been left behind drops, immediately generating a siphon force, and the drainage is discharged quickly and efficiently. Thereafter, in this siphon drainage system, the above can be repeated, and every time drainage is discharged from the drain outlet of the plumbing fixture, the drainage can be discharged quickly and efficiently.

[0014] The siphon drainage system according to the second aspect includes a siphon drainage pipe configured to include a horizontal draw pipe provided on the downstream side in the drainage direction of the plumbing fixture and extending horizontally, and a vertical pipe extending downward from the downstream end of the horizontal draw pipe to generate a siphon force, and an on-off valve provided on the downstream side of the vertical pipe. The on-off valve is in an open state when the pressure received from the drainage in the vertical pipe located upstream of the on-off valve is higher than a first pressure corresponding to the water head required to generate a siphon force in the vertical pipe.

[0015] In the siphon drainage system according to the second aspect, the initial state can be a state in which the on-off valve is closed and the drainage corresponding to the water head capable of generating a siphon force in the vertical pipe is stored.

[0016] In this siphon drainage system in the initial state, when drainage is discharged from the plumbing fixture, the pressure in the siphon drainage pipe rises due to the discharge of the drainage. When drainage is discharged from the plumbing fixture and the pressure in the vertical pipe rises, and the pressure in the vertical pipe becomes higher than the first pressure corresponding to the water head required to generate a siphon force in the vertical pipe, the on-off valve opens, the drainage in the vertical pipe drops, and a siphon force is immediately generated immediately after the discharge of the drainage from the plumbing fixture starts. Therefore, the drainage discharged from the plumbing fixture can be discharged quickly and efficiently using the siphon drainage pipe.

[0017] In this way, by storing the drainage in the vertical pipe in advance, the siphon force is generated without waiting for the time for the drainage from the water-related equipment to pass through the horizontal pipe, and the time until the siphon starts can be shortened regardless of the length of the horizontal pipe.

[0018] The siphon drainage system according to the third aspect is the siphon drainage system according to the first aspect, wherein the detection device is a pressure sensor that detects the pressure in the vertical pipe, and the control device controls the on-off valve based on the pressure detection result detected by the pressure sensor.

[0019] In the siphon drainage system according to the third aspect, in the initial state of the siphon drainage system, when draining water from the water-related equipment, the pressure in the vertical pipe rises. When the control device detects that the pressure detected by the pressure sensor has risen, it can determine that the water has been drained from the water-related equipment and set the on-off valve to the open state.

[0020] Even after all the drainage has been discharged from the water-related equipment, the siphon force (negative pressure) continues to be generated for a certain period of time, so air flows into the siphon drainage pipe from the water-related equipment side. When air flows into the siphon drainage pipe, the pressure in the vertical pipe relatively increases compared to the case where the drainage is in full flow and flowing through the siphon drainage pipe. In other words, the negative pressure in the vertical pipe is alleviated.

[0021] After draining the water with the on-off valve in the open state, when the pressure sensor detects that the pressure in the vertical pipe has increased, in other words, when all the drainage has been discharged from the water-related equipment, the control device closes the on-off valve. Thereby, it is possible to leave the drainage in at least the vertical pipe of the siphon drainage pipe and a part of the horizontal pipe.

[0022] In this way, by keeping the on-off valve in the closed state and maintaining the state where the drainage remains in the vertical pipe of the siphon drainage pipe and a part of the horizontal pipe, it is possible to secure the water head for generating the siphon force required at the next drainage discharge in the vertical pipe.

[0023] The siphon drainage system according to the fourth aspect is the siphon drainage system according to the third aspect, further comprising a rotating body provided in the siphon drain pipe and rotated by the drainage flowing inside, a generator driven by the rotating body to generate electric power, and a storage battery for storing the electric power generated by the generator, wherein the control device and the on-off valve are driven by the electric power stored in the storage battery.

[0024] In the siphon drainage system according to the fourth aspect, when the drainage discharged from the plumbing equipment flows through the siphon drain pipe, the rotating body rotates and the generator generates electric power. The electric power generated by the generator is stored in the storage battery, and the control device and the on-off valve can be driven by the electric power stored in the storage battery. Therefore, the siphon drainage system can be operated even during a power outage.

Effect of the Invention

[0025] As described above, according to the siphon drainage system of the present disclosure, the time until the siphon starts can be shortened.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0027] [First Embodiment] The siphon drainage system 10 according to the first embodiment of the present disclosure will be described with reference to FIGS. 1(A) and (B).

[0028] As shown in FIG. 1(A), on each floor of the building 12, a siphon drainage system 10 is provided to efficiently discharge the drainage from the plumbing fixtures by utilizing the siphon force.

[0029] The siphon drainage system 10 includes a siphon drainage pipe 14 composed of a lateral draw pipe (also referred to as a horizontal pipe) 14A and a vertical pipe (also referred to as a vertical pipe) 14B, and is a drainage system that efficiently discharges the drainage from a bathtub 18 as an example of the plumbing fixtures in the bathroom 16.

[0030] The lateral draw pipe 14A of the siphon drainage pipe 14 is connected to the drainage outlet of the bathtub 18. The lateral draw pipe 14A is horizontally laid without a gradient on the slab 12A.

[0031] The vertical pipe 14B is connected to the downstream side of the lateral draw pipe 14A and is a pipe that generates a siphon force by allowing the drainage from the lateral draw pipe 14A to flow down, and extends downward (vertically downward).

[0032] In the building 12, a drainage riser 20 extending vertically is provided. A junction fitting 22 is attached to the drainage riser 20. The drainage flowing through the siphon drainage pipe 14 is discharged into the drainage riser 20 via the junction fitting 22.

[0033] The lateral draw pipe 14A of the siphon drainage pipe 14 is laid horizontally without a gradient on the slab 12A and is not inclined like a sloped pipe. Therefore, compared with the case of arranging a sloped pipe, the vertical dimension H of the space under the floor 24 can be made smaller. For this reason, in the building 12 provided with the siphon drainage system 10, the floor 24 is lowered compared to the floor in the case of arranging a conventional sloped pipe.

[0034] An electric on-off valve 26 is provided near the downstream side of the vertical pipe 14B, more specifically, near the junction fitting 22.

[0035] The length L of the vertical pipe 14B upstream (above) of the on-off valve 26 is set to be longer than the head Hs required to generate the siphon force in the vertical pipe 14B. As an example, the length L of the vertical pipe 14B is 3 m and the head Hs is 1.5 m, but the length L of the vertical pipe 14B and the head Hs are not limited to the above dimensions.

[0036] A pressure sensor 28, which is an example of a detection device, is provided above the on-off valve 26 and adjacent to the on-off valve 26 in the vertical pipe 14B. As shown in FIG. 1(B), the pressure sensor 28 is connected to the control device 30. The pressure sensor 28 detects the pressure in the vertical pipe 14B and transmits the pressure detection data to the control device 30.

[0037] The on-off valve 26 is connected to the control device 30, and the control device 30 controls the opening and closing of the on-off valve 26 based on the pressure detection data transmitted from the pressure sensor 28. As shown in FIG. 1(A), the vertical pipe 14B, the control device 30, etc. are provided in the common part (meter box, etc.) 32 of the building 12. In this embodiment, the on-off valve 26 and the control device 30 obtain power from a commercial power supply (not shown).

[0038] (Operation, Effect) Next, the operation and effect of the siphon drainage system 10 of this embodiment will be described. In the initial state of the siphon drainage system 10 of this embodiment, the on-off valve 26 is closed, and the vertical pipe 14B above the on-off valve 26 stores drainage corresponding to the head Hs for generating the siphon force (predetermined siphon force required in the siphon drainage system 10).

[0039] In this state, when the drain outlet of the bathtub 18 is released and drainage is discharged from the bathtub 18, the pressure of the drainage (water pressure) rapidly increases the pressure in the downstream siphon drainage pipe 14. When the pressure in the vertical pipe 14B is detected by the pressure sensor 28, the control device 30 immediately opens the on-off valve 26 to the open state.

[0040] When the on-off valve 26 is in the open state, the wastewater stored in the vertical pipe 14B above the on-off valve 26 drops inside the vertical pipe. After the wastewater from the bathtub 18 is discharged, siphon force is generated immediately, in other words, almost without a time lag. Therefore, the wastewater from the bathtub 18 can be quickly and efficiently discharged to the drain riser 20 through the siphon drain pipe 14.

[0041] When siphon force is generated and the wastewater is in full flow and flowing inside the siphon drain pipe 14, in order to suck the upstream wastewater, the pressure inside the vertical pipe 14B becomes low (in other words, the pressure inside the vertical pipe 14B becomes negative pressure).

[0042] And even after all the hot water (water) in the bathtub 18 is discharged from the drain outlet of the bathtub 18, siphon force continues to be generated for a certain period of time. Therefore, air flows into the siphon drain pipe 14 from the drain outlet of the bathtub 18. When air flows into the siphon drain pipe 14, the pressure inside the vertical pipe 14B relatively increases compared to the case when the wastewater is in full flow and flowing inside the siphon drain pipe 14. In other words, the negative pressure inside the vertical pipe 14B is relieved.

[0043] After draining the wastewater with the on-off valve 26 in the open state, when the pressure sensor 28 detects that the pressure inside the vertical pipe 14B has increased, in other words, all the hot water (water) in the bathtub 18 has been discharged from the drain outlet of the bathtub 18, the control device 30 closes the on-off valve 26. Thereby, wastewater can be left in a part of the vertical pipe 14B and the horizontal pipe 14A of the siphon drain pipe 14.

[0044] In this way, when the on-off valve 26 is in the closed state and the state where wastewater remains in a part of the vertical pipe 14B and the horizontal pipe 14A of the siphon drain pipe 14 is maintained, a water head Hs for generating at least the siphon force required at the next wastewater discharge can be ensured in the vertical pipe 14B.

[0045] Therefore, next, when the hot water (water) in the bathtub 18 is discharged from the drain outlet of the bathtub 18, as described above, the pressure sensor 28 detects the pressure increase, the control device 30 opens the on-off valve 26, the siphon force is immediately generated, and the drainage can be performed quickly and efficiently.

[0046] In the siphon drainage system 10 of the present embodiment, since the siphon force can be obtained immediately after the drainage from the bathtub 18, for example, the horizontal pipe 14A can be a long-distance pipe exceeding 20 m.

[0047] In addition, in the siphon drainage system 10 of the present embodiment, after the drainage from the bathtub 18 is completed, the vertical pipe 14B of the siphon drainage pipe 14 and a part of the horizontal pipe 14A can be filled with drainage, so that the accumulation of dirt due to dryness and wetness in the pipe, biofilm, etc. can be suppressed.

[0048] In the conventional siphon drainage system, since a water-sealed drainage trap was provided between the bathtub and the siphon drainage pipe, when the siphon force was acting after drainage, the water seal might be sucked by the siphon force (i.e., unsealed). Therefore, it was necessary to ensure ventilation or the like to eliminate the siphon force. However, in the siphon drainage system 10 of the present embodiment, when the drainage from the bathtub 18 is completed, the on-off valve 26 closes, and the backflow of odors and the like from the downstream side to the upstream side is suppressed. Therefore, it is not necessary to provide a water-sealed drainage trap, and there is no need to ensure ventilation or the like.

[0049] In the conventional siphon drainage system, when the horizontal pipe becomes long, it takes time for the drainage discharged from the plumbing fixture to reach the vertical pipe and fall, and efficient drainage cannot be performed until the siphon is activated. Therefore, a temporary storage tank may be provided upstream of the siphon drainage pipe to allow a large amount of drainage discharged from the plumbing fixture to flow in and temporarily store the drainage until the siphon is activated. However, in the siphon drainage system 10 of the present embodiment, the siphon force is generated immediately when the drainage is started, and efficient drainage can be performed. Therefore, the conventional temporary storage tank is not required.

[0050] Also, since it is not necessary to provide a temporary storage tank having a height dimension larger than the diameter dimension of the horizontal pipe 14A under the floor, the floor only needs to ensure the minimum necessary height where the horizontal pipe 14A can be arranged. Compared with the conventional siphon drainage system provided with a temporary storage tank, the height H from the slab 12A to the floor 24 can be reduced, and thereby, the ceiling height from the floor 24 to the ceiling (not shown) can be increased.

[0051] [Second Embodiment] Next, the siphon drainage system 10 according to the second embodiment of the present disclosure will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0052] In the siphon drainage system 10 of the present embodiment, as shown in FIG. 2, a hydraulic power generation device 34 is provided in the vertical pipe 14B on the downstream side of the on-off valve 26.

[0053] When drainage flows into the vertical pipe 14B, the waterwheel 36 of the power generation device 34 rotates, and electric power is generated by the generator 38 connected to the waterwheel 36. The electric power generated by the generator 38 can be stored in the storage battery 40. The electric power stored in the storage battery 40 can be used by the on-off valve 26, the control device 30, and the like.

[0054] In the siphon drainage system 10 of the present embodiment, since the electric power obtained by the power generation device 34 is used by the on-off valve 26, the control device 30, and the like, a commercial power supply is not required, and the siphon drainage system 10 can be used even during a power outage. Note that the storage battery 40 may store electric power supplied from a commercial power supply.

[0055] [Third Embodiment] Next, the siphon drainage system 10 according to the third embodiment of the present disclosure will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 3, in the siphon drainage system 10 of the present embodiment, the pressure sensor 28, the on-off valve 26, and the control device 30 provided in the first embodiment are not provided, and an on-off valve 42 is provided at the position where the on-off valve 26 is provided.

[0056] The on-off valve 42 is a valve that opens when the pressure exceeds a preset pressure and maintains a closed state when the pressure is below the preset pressure. The on-off valve 42 has a mechanism similar to, for example, a check valve, a relief valve, a safety valve, etc. As an example, it has a configuration in which a valve body disposed on the downstream side of the valve hole is biased by a spring so as to press against the valve hole.

[0057] The on-off valve 42 of the present embodiment is set to open when the pressure corresponding to the water head Hs of the drainage accumulated in the vertical pipe 14B (the first pressure of the present disclosure) is exceeded, and to maintain a closed state when the pressure is below the pressure.

[0058] In the initial state, drainage corresponding to the water head Hs is stored in the vertical pipe 14B. In this state, when hot water (water) is discharged from the drain outlet of the bathtub 18, a pressure exceeding the pressure corresponding to the water head Hs acts on the on-off valve 42, so the on-off valve 42 opens, and the drainage stored in the vertical pipe 14B falls, and the siphon force is immediately generated.

[0059] Therefore, also in the present embodiment, when hot water (water) is discharged from the drain outlet of the bathtub 18, the siphon force is immediately generated in the same manner as in the first embodiment, so that drainage can be performed quickly and efficiently in the same manner as in the first embodiment.

[0060] On the other hand, when all the hot water (water) in the bathtub 18 is discharged from the drain outlet of the bathtub 18 and air flows into the siphon drain pipe 14 from the drain outlet, the pressure from the upstream side acting on the on-off valve 42 decreases, the on-off valve 42 closes, and drainage can be stored in the vertical pipe 14B on the upstream side of the on-off valve 42. Therefore, next, the state in which the drainage is stored is maintained until the drainage is drained from the drain outlet of the bathtub 18. When the drainage is drained from the drain outlet of the bathtub 18, the on-off valve 42 opens, and quick and efficient drainage can be performed by the siphon force.

[0061] In the siphon drainage system 10 of the present embodiment, since the on-off valve 42 opens and closes according to the pressure change of the drainage, power is not used, and the siphon drainage system 10 can be used even during a power outage.

[0062] [Other Embodiments] As described above, one embodiment of the present disclosure has been described. However, the present disclosure is not limited to the above, and it goes without saying that various modifications can be made without departing from the gist thereof.

[0063] In the first embodiment, the pressure sensor 28 is provided adjacent to the on-off valve 26 in the vertical pipe 14B above the on-off valve 26. However, the pressure sensor 28 may be provided at a position away from the on-off valve 26, or may be provided in the horizontal pipe 14A. In other words, the pressure sensor 28 may be provided at any position as long as it can detect the pressure at the time of discharging the drainage.

[0064] In the above embodiment, the bathtub 18 is an example of the plumbing equipment. However, the plumbing equipment is not limited to the bathtub 18, and the plumbing equipment may be a kitchen sink, a washing machine, a dishwasher, a washbasin, or the like.

[0065] In the above first embodiment, the pressure sensor 28 is used as the detection device to detect the discharge of the drainage from the bathtub 18. However, a flow sensor may be used instead of the pressure sensor 28 as the detection device. By using the flow sensor, the discharge of the drainage from the bathtub 18 can be detected, and the on-off valve 26 can be opened and closed by the control device 30.

Description of Reference Numerals

[0066] 10... siphon drainage system, 14... siphon drainage pipe 14, 14A... horizontal pipe, 14B... vertical pipe, 18... bathtub (plumbing equipment), 26... on-off valve, 28... pressure sensor (detection device), 30... control device, 42... on-off valve

Claims

1. A siphon drain pipe provided on the downstream side in the drainage direction of the plumbing equipment, comprising a horizontal pipe extending horizontally and a vertical pipe extending downward from the downstream end of the horizontal pipe, a detection device for detecting the discharge of drainage from the plumbing equipment, a switching valve provided in the middle part of the vertical pipe and capable of storing the drainage on the upstream side, a control device for controlling the switching valve based on the drainage discharge detection result detected by the detection device, A siphon drainage system having the above components.

2. A siphon drain pipe provided on the downstream side in the drainage direction of the plumbing equipment, comprising a horizontal pipe extending horizontally and a vertical pipe extending downward from the downstream end of the horizontal pipe to generate siphon force, a switching valve provided on the downstream side of the vertical pipe, The siphon drainage system is provided with the above components. When the pressure received from the drainage in the vertical pipe located upstream of the switching valve is higher than a first pressure corresponding to the water head required to generate siphon force in the vertical pipe, the switching valve is in an open state. A siphon drainage system.

3. The detection device is a pressure sensor for detecting the pressure in the vertical pipe, The control device controls the switching valve based on the pressure detection result detected by the pressure sensor. The siphon drainage system according to Claim 1.

4. A rotating body provided in the siphon drain pipe and rotated by the drainage flowing inside, a generator driven by the rotating body to generate electric power, a storage battery for storing the electric power generated by the generator, The siphon drainage system is provided with the above components. The control device and the switching valve are driven by the electric power stored in the storage battery. The siphon drainage system according to Claim 3.

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