Drainage system

Abstract

To provide a drainage system, in a case where a non-general drain duct for sending non-general wastewater is provided in addition to a general drain duct for sending general wastewater, capable of reducing production cost while enabling maintenance work without interrupting general drainage or non-general drainage.SOLUTION: A drainage system comprises: a general drain duct 3 that sends general wastewater to a general drain tank 2; a non-general drain duct 5 that sends non-general wastewater to a non-general drain tank 4; a general drain branching duct 10 that branches from the general drain duct 3 and sends the general wastewater to the non-general drain tank 4; a non-general drain branching duct 11 that branches from the non-general drain duct 5 and sends the non-general wastewater to the general drain tank 2; a general wastewater destination switching part 12 switchable between a state where a destination of the general wastewater is the general drain tank 2 and a state where the destination of the general wastewater is the non-general drain tank 4; and a non-general wastewater destination switching part 13 switchable between a state where a destination of the non-general wastewater is the non-general drain tank 4 and a state where the destination of the non-general wastewater is the general drain tank 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a drainage system having a general drainage channel for sending general drainage to a general drainage tank, and a non-general drainage channel for sending non-general drainage other than the general drainage to the non-general drainage tank. [Background technology]

[0002] Patent Document 1 shows a water supply system that is provided with a first water tank 1 and a second water tank 2 to which water is supplied via a water supply path, and that is equipped with a switching valve 5 in the water supply path that can freely switch the water supply destination to only the first water tank 1 or only the second water tank 2. In such a water supply system, because water is supplied to only one of the first water tank 1 or the second water tank 2, maintenance work can be performed on the other water tank without interrupting the water supply.

[0003] Such a water supply system could be used in a drainage system, for example, to provide a first and second general drainage tanks to which wastewater from ordinary households, etc. is sent via a general drainage channel, and the general drainage channel could be equipped with a general drainage destination switching unit that can freely switch the destination of the general drainage to either the first general drainage tank or the second general drainage tank. In such a drainage system, maintenance work on the first general drainage tank and the second general drainage tank can be performed without interrupting the general drainage. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 04-085421 Summary of the Invention [Problem to be solved by the invention]

[0005] However, since it is necessary to provide multiple general drainage tanks for the general drainage channel, the manufacturing cost tends to be high. In addition, in some drainage systems, in addition to general drainage channels that carry general wastewater, non-general drainage channels that carry non-general wastewater such as wastewater from kitchens are also provided.When non-general drainage channels are provided in addition to general drainage channels, the number of drainage tanks increases further, which tends to further increase manufacturing costs.

[0006] In view of this situation, the main object of the present invention is to provide a drainage system that can reduce manufacturing costs while allowing maintenance work to be performed without interrupting the general drainage or non-general drainage, in a case where a general drainage channel that carries general drainage is provided in addition to a non-general drainage channel that carries non-general drainage that is not general drainage, such as drainage from a kitchen. [Means for solving the problem]

[0007] A first characteristic configuration of the present invention is a general drainage channel that sends general drainage to a general drainage tank; kitchen Drainage kitchen Send to drain tank kitchen Drainage channels and Branching off from the general drainage channel, kitchen A general drainage branch that sends the water to a drainage tank; The aforementioned kitchen Branching off from the drainage channel kitchen Send the wastewater to the general wastewater tank kitchen A drainage channel and A drainage system is provided at a branch point from the general drainage channel to the general drainage branch channel, and is configured to send the general drainage to the general drainage tank as a destination of the general drainage in a general drainage normal state and a general drainage system configured to send the general drainage to the kitchen a general drainage destination switching unit that can be freely switched between a general drainage branch state and a drainage tank; The aforementioned kitchen From the drainage channel kitchen It is provided at the branch point to the drainage branch, kitchen The destination of the wastewater is as mentioned above. kitchen Use as a drainage tank kitchen Normal drainage state and kitchen The destination of the wastewater is the general wastewater tank. kitchen Freely switchable between drainage and branching states kitchenThe feature is that it is equipped with a wastewater destination switching unit.

[0008] According to this configuration, the general wastewater destination switching unit is switched to the general wastewater normal state, kitchen Wastewater destination switching unit kitchen By switching to normal drainage, general drainage is sent to the general drainage tank. kitchen Drainage kitchen It can be sent to a drain tank. From this state, by switching the general wastewater destination switching unit to the general wastewater branch state, the general wastewater can be kitchen Since the general wastewater can be sent to the drainage tank and the general wastewater will no longer be sent to the general drainage tank, maintenance work on the general drainage tank can be performed while continuing to send the general wastewater to the drainage tank. kitchen Wastewater destination switching unit kitchen By switching to the drainage branch state, kitchen The wastewater can be sent to a general drainage tank, kitchen In the drain tank kitchen Because wastewater cannot be sent, kitchen While continuing to send wastewater to the drainage tank kitchen This allows for maintenance work on the drainage tank. And during maintenance work, kitchen Since there is no need to prepare a separate drainage tank for continuously sending wastewater, the manufacturing costs of the drainage system can be reduced compared to when a separate drainage tank is prepared.

[0009] A second characteristic configuration of the present invention is a general drainage tank discharge means that includes a plurality of general drainage tank pumps and discharges drainage water from the general drainage tank; Multiple units kitchen Equipped with a drainage tank pump kitchen Discharge wastewater from the drain tank kitchen and a drainage tank discharge means, The general drainage is sent to the general drainage tank, and kitchen In the drain tank kitchenIn a normal drainage state in which drainage water is sent, the general drainage tank discharge means operates a number of general drainage tank pumps, which are a part of the plurality of general drainage tank pumps, for normal use in general drainage, to discharge drainage water from the general drainage tank, and kitchen The drainage tank discharge means is kitchen Part of the drainage tank pump kitchen The number of normal drainage units mentioned above kitchen Operate the drainage tank pump to kitchen Discharge wastewater from the drain tank, The general drainage tank is filled with the general drainage and the kitchen In a general drainage tank combined drainage state in which both the drainage water and the drainage water are sent, the general drainage tank discharge means operates the general drainage tank pumps for combined general drainage, which number is greater than the number of general drainage normal drainage pumps, among the plurality of general drainage tank pumps, to discharge the drainage water from the general drainage tank, The aforementioned kitchen The general drainage and the kitchen Both the water and the wastewater are sent kitchen In the drainage tank combined drainage state, kitchen The drainage tank discharge means is kitchen The above mentioned drainage tank pump kitchen More than the usual number of drainage units kitchen Number of drainage confluence units kitchen Operate the drainage tank pump to kitchen The feature is that the system is configured to discharge wastewater from the drainage tank.

[0010] According to this configuration, the general drainage tank discharge means can select a normal drainage state in which only general drainage is sent to the general drainage tank, and a normal drainage state in which both general drainage and kitchen By changing the number of pumps in operation, it is possible to discharge the amount of wastewater that matches the amount of wastewater sent to the general drainage tank. kitchen The drain tank discharge means is kitchen In the drain tank kitchen Normal drainage state where only wastewater is sent and general drainage and kitchen Both wastewater and kitchen By changing the number of pumps in operation depending on the drainage tank confluence drainage status, kitchen It is possible to discharge the wastewater in an amount commensurate with the amount of wastewater sent to the drainage tank.

[0011] The third characteristic configuration of the present invention is the general drainage tank discharge means and kitchen a control unit for controlling the drainage tank discharge means; The control unit is configured to switch between the general wastewater destination switching unit and the kitchen Based on the switching state with the drainage destination switching unit, the normal drainage state, the general drainage tank combined drainage state, or the kitchen The drainage tank discharge means and the drainage tank discharge means are determined to be in a combined drainage state. kitchen The point is to control the drain tank discharge means.

[0012] According to this configuration, the general wastewater destination switching unit and kitchen Depending on the switching of the drainage destination switching unit, kitchen The operation of the drainage tank discharge means can be automatically changed, so the general drainage destination switching unit and kitchen Even though the drainage destination switch unit has been switched, kitchen This makes it possible to avoid forgetting to change the operation of the drain tank discharge means.

[0013] The fourth characteristic configuration of the present invention is the above kitchen The wastewater is high-temperature wastewater having a higher temperature than the general wastewater, The inner surface of the general drainage tank and the kitchen The difference is that both the inside of the drainage tank and the drainage tank are made of waterproof specifications that can withstand high-temperature drainage.

[0014] According to this configuration, high-temperature wastewater kitchen for storing wastewater kitchen The inner surface of the drainage tank as well as the inner surface of the general drainage tank for storing general wastewater are made of waterproof specifications that can withstand high temperature drainage. kitchen There is no problem if the wastewater is sent to a general drainage tank. kitchen Wastewater can be stored. [Brief explanation of the drawings]

[0015] [Figure 1] Diagram showing the drainage system in normal drainage state [Figure 2] A diagram showing a drainage system with a general drainage tank combined drainage system [Figure 3] A diagram showing the drainage system with the kitchen drainage tank combined drainage DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a drainage system according to the present invention will be described with reference to the drawings. As shown in Figures 1 to 3, the drainage system 1 includes a general drainage channel 3 that sends general drainage to a general drainage tank 2, and a kitchen drainage channel 5 (an example of a non-general drainage channel) that sends kitchen drainage (an example of non-general drainage that is not general drainage) to a kitchen drainage tank 4 (an example of a non-general drainage tank). In this embodiment, the non-general drainage is kitchen drainage, and the non-general drainage is high-temperature drainage that has a higher temperature than general drainage. In Figures 1 to 3, the water channels through which the drainage flows are indicated by thick lines.

[0017] The general drainage tank 2 and the kitchen drainage tank 4 are provided on the lower floors of the building, and the general drainage channel 3 is configured to discharge general wastewater into the general drainage tank 2 by natural discharge, and the kitchen drainage channel 5 is configured to discharge kitchen wastewater into the kitchen drainage tank 4 by natural discharge. The drainage system 1 also includes a general drainage tank discharge means 7 that includes a plurality of general drainage tank pumps 7A and discharges drainage water from the general drainage tank 2, and a kitchen drainage tank discharge means 8 (an example of a non-general drainage tank discharge means) that includes a plurality of kitchen drainage tank pumps 8A (an example of a non-general drainage tank pump) and discharges drainage water from the kitchen drainage tank 4. In this embodiment, two general drainage tank pumps 7A are provided as the plurality of general drainage tank pumps 7A, and two kitchen drainage tank pumps 8A are provided as the plurality of kitchen drainage tank pumps 8A. The general drainage tank discharge means 7 is composed of two general drainage tank pumps 7A and a general drainage tank drainage channel 7B, and is configured to pump up and discharge drainage water stored in the general drainage tank 2 into a sewer pipe. The kitchen drainage tank discharge means 8 is composed of two kitchen drainage tank pumps 8A and a kitchen drainage tank drainage channel 8B, and is configured to pump up and discharge drainage water stored in the kitchen drainage tank 4 into a sewer pipe.

[0018] The drainage system 1 also includes a general drainage branch 10 that branches off from the general drainage channel 3 and sends general drainage to the kitchen drainage tank 4, a kitchen drainage branch 11 (an example of a non-general drainage branch) that branches off from the kitchen drainage channel 5 and sends kitchen drainage to the general drainage tank 2, a general drainage destination switching unit 12 provided at the branch point from the general drainage channel 3 to the general drainage branch 10, and a kitchen drainage destination switching unit 13 (an example of a non-general drainage destination switching unit) provided at the branch point from the kitchen drainage channel 5 to the kitchen drainage branch 11.

[0019] The general drainage destination switching unit 12 is configured to be freely switchable between a general drainage normal state (see Figures 1 and 2) in which the destination of general drainage is the general drainage tank 2, and a general drainage branch state (see Figure 3) in which the destination of general drainage is the kitchen drainage tank 4. Specifically, for example, the general drainage destination switching unit 12 has a rotatable plug built in, and by rotating the plug, it is possible to switch between a state in which general drainage flowing from the general drainage channel 3 is directly discharged into the general drainage channel 3 (general drainage normal state), and a state in which general drainage flowing from the general drainage channel 3 is discharged into the general drainage branch channel 10 (general drainage branch state).

[0020] Kitchen wastewater destination switching unit 13 is configured to be freely switchable between a kitchen wastewater normal state (non-general drainage normal state, see Figures 1 and 3) in which the destination of kitchen wastewater is kitchen wastewater tank 4, and a kitchen wastewater branch state (non-general drainage branch state, see Figure 2) in which the destination of kitchen wastewater is general drainage tank 2. Specifically, for example, kitchen wastewater destination switching unit 13 has a rotatable plug built in, and by rotating the plug, it is possible to switch between a state in which kitchen wastewater flowing from kitchen drainage channel 5 is directly discharged into kitchen drainage channel 5 (general drainage normal state), and a state in which kitchen wastewater flowing from kitchen drainage channel 5 is discharged into kitchen drainage branch channel 11 (general drainage branch state).

[0021] As shown in Figure 1, the drainage system 1 can be switched to a normal drainage state in which general drainage is sent to the general drainage tank 2 and kitchen drainage is sent to the kitchen drainage tank 4 by switching the general drainage destination switching unit 12 to a normal general drainage state and switching the kitchen drainage destination switching unit 13 to a normal kitchen drainage state. In addition, as shown in Figure 2, the drainage system 1 can be switched to a general drainage tank combined drainage state in which both general drainage and kitchen drainage are sent to the general drainage tank 2 by switching the general drainage destination switching unit 12 to a normal general drainage state and switching the kitchen drainage destination switching unit 13 to a kitchen drainage branch state. In addition, as shown in Figure 3, the drainage system 1 can be switched to a kitchen drainage tank combined drainage state (non-general drainage tank combined drainage state) in which both general drainage and kitchen drainage are sent to the kitchen drainage tank 4 by switching the general drainage destination switching unit 12 to a general drainage branch state and switching the kitchen drainage destination switching unit 13 to a normal kitchen drainage state.

[0022] Kitchen wastewater is high-temperature wastewater with a higher temperature than general wastewater. Therefore, the inner surface of the kitchen wastewater tank 4 is constructed with a waterproof specification that can withstand high-temperature wastewater. Furthermore, in the general wastewater tank combined discharge state, the high-temperature kitchen wastewater is also sent to the general wastewater tank 2. Therefore, the inner surface of the general wastewater tank 2 is also constructed with a waterproof specification that can withstand high-temperature wastewater. In this way, both the inner surface of the general wastewater tank 2 and the inner surface of the kitchen wastewater tank 4 are constructed with a waterproof specification that can withstand high-temperature wastewater. In this embodiment, the inner surface of the general drainage tank 2 is waterproofed by lining with an organic acid-resistant epoxy resin, and the inner surface of the kitchen drainage tank 4 is waterproofed by lining with a vinyl ester resin.

[0023] As shown in Figures 1 to 3, the general drainage tank 2 is equipped with a general drainage tank pump stop water level detection unit 15 that detects whether the water level in the general drainage tank 2 is equal to or higher than the general drainage tank pump stop water level, and a general drainage tank pump operating water level detection unit 16 that detects whether the water level in the general drainage tank 2 is equal to or higher than the general drainage tank pump operating water level. The drainage system 1 detects the water level in the general drainage tank 2 based on the detection information from the general drainage tank pump stop water level detection unit 15 and the general drainage tank pump operation water level detection unit 16.

[0024] In this way, a general drainage tank pump stop water level and a general drainage tank pump operating water level are set for the general drainage tank 2. The general drainage tank pump operating water level is a water level higher than the general drainage tank pump stop water level. In addition, the general drainage tank pump stop water level detection unit 15 and the general drainage tank pump operation water level detection unit 16 are provided with floats that rise when the drainage water level in the general drainage tank 2 reaches or exceeds the corresponding water level.

[0025] As shown in Figures 1 to 3, the kitchen drainage tank 4 is also provided with a kitchen drainage tank pump stop water level detection unit 18 that detects whether the water level in the kitchen drainage tank 4 is equal to or higher than the kitchen drainage tank pump stop water level, and a kitchen drainage tank pump operating water level detection unit 19 that detects whether the water level in the kitchen drainage tank 4 is equal to or higher than the kitchen drainage tank pump operating water level. The drainage system 1 detects the water level in the kitchen drainage tank 4 based on the detection information from the kitchen drainage tank pump stop water level detection unit 18 and the kitchen drainage tank pump operation water level detection unit 19.

[0026] In this way, a kitchen drainage tank pump stop water level and a kitchen drainage tank pump operating water level are set for the kitchen drainage tank 4. The kitchen drainage tank pump operating water level is a water level higher than the kitchen drainage tank pump stop water level. In addition, the kitchen drainage tank pump stop water level detection unit 18 and the kitchen drainage tank pump operation water level detection unit 19 are provided with floats that rise when the drainage water level in the kitchen drainage tank 4 reaches or exceeds the corresponding water level.

[0027] As shown in Figure 1, in the drainage system 1, in the normal drainage state, the general drainage tank discharge means 7 operates a number of general drainage tank pumps 7A, which are a part of the multiple general drainage tank pumps 7A, for normal general drainage use, to discharge drainage water from the general drainage tank 2, and the kitchen drainage tank discharge means 8 operates a number of kitchen drainage tank pumps 8A, which are a part of the multiple kitchen drainage tank pumps 8A, for normal kitchen drainage use (an example of a number of non-general drainage normal use units), to discharge drainage water from the kitchen drainage tank 4. Specifically, in this embodiment, the drainage system 1 is configured such that, in the normal drainage state, the general drainage tank discharge means 7 operates only one of the two (multiple) general drainage tank pumps 7A (the number of pumps normally used for general drainage) to discharge drainage from the general drainage tank 2, and the kitchen drainage tank discharge means 8 operates only one of the two (multiple) kitchen drainage tank pumps 8A (the number of pumps normally used for kitchen drainage) to discharge drainage from the kitchen drainage tank 4.

[0028] In addition, as shown in FIG. 2, in the drainage system 1, in the general drainage tank combined drainage state, the general drainage tank discharge means 7 is configured to discharge wastewater from the general drainage tank 2 by operating a number of general drainage tank pumps 7A for combined general drainage that is greater than the number of pumps for normal general drainage among the multiple general drainage tank pumps 7A. Specifically, in this embodiment, the drainage system 1 is configured such that, in the general drainage tank combined drainage state, the general drainage tank discharge means 7 operates both of the two (multiple) general drainage tank pumps 7A (the number for general drainage combined drainage) to discharge drainage from the general drainage tank 2.

[0029] Furthermore, as shown in Figure 3, in the drainage system 1, in the kitchen drainage tank combined drainage state, the kitchen drainage tank discharge means 8 is configured to discharge wastewater from the kitchen drainage tank 4 by operating a number of kitchen drainage tank pumps 8A for combined kitchen drainage (an example of the number of non-general combined drainage pumps) that is greater than the number of units for normal kitchen drainage among the multiple kitchen drainage tank pumps 8A. Specifically, in this embodiment, the drainage system 1 is configured such that, in the kitchen drainage tank combined drainage state, the kitchen drainage tank discharge means 8 operates both of the two (multiple) kitchen drainage tank pumps 8A (the number of kitchen drainage combined pumps) to discharge drainage water from the kitchen drainage tank 4.

[0030] To explain the operation of the drainage system 1, the drainage system 1 is equipped with a control unit H that determines whether the system is in a normal drainage state, a general drainage tank combined drainage state, or a kitchen drainage tank combined drainage state based on the switching status of the general drainage destination switching unit 12 and the kitchen drainage destination switching unit 13, and controls the general drainage tank discharge means 7 and the kitchen drainage tank discharge means 8.

[0031] The drainage system 1 is equipped with a general drainage detection unit 22 that detects the switching state of the general drainage destination switching unit 12, and a kitchen drainage tank detection unit 23 that detects the switching state of the kitchen drainage destination switching unit 13. In this embodiment, the general drainage detection unit 22 is configured to detect the rotation position of a plug installed inside the general drainage destination switching unit 12, and the kitchen drainage tank detection unit 23 is configured to detect the rotation position of a plug installed inside the kitchen drainage destination switching unit 13. The control unit H determines the switching states of the general drainage destination switching unit 12 and the kitchen drainage destination switching unit 13 based on the detection information from the general drainage detection unit 22 and the kitchen drainage tank detection unit 23.

[0032] Then, as shown in Figure 1, when the general drainage destination switching unit 12 is in the normal general drainage state and the kitchen drainage destination switching unit 13 is in the normal kitchen drainage state, the control unit H determines that the state is normal drainage and controls the general drainage tank discharge means 7 and the kitchen drainage tank discharge means 8 to perform normal drainage control. In addition, as shown in Figure 2, when the general drainage destination switching unit 12 is in the normal general drainage state and the kitchen drainage destination switching unit 13 is in the kitchen drainage branching state, the control unit H determines that the general drainage tank combined drainage state is in effect and controls the general drainage tank discharge means 7 to execute general drainage tank combined drainage control. In addition, as shown in Figure 3, when the general drainage destination switching unit 12 is in the general drainage branching state and the kitchen drainage destination switching unit 13 is in the kitchen drainage normal state, the control unit H determines that the state is the kitchen drainage tank combined drainage state and controls the kitchen drainage tank discharge means 8 to execute kitchen drainage tank combined drainage control.

[0033] Normal drainage control is control executed in a normal drainage state. In normal drainage control, the control unit H controls the general drainage tank discharge means 7 so that, as the water level in the general drainage tank 2 rises to the general drainage tank pump operating water level, only one of the two general drainage tank pumps 7A is operated to start discharging wastewater from the general drainage tank 2, and as the water level in the general drainage tank 2 drops to the general drainage tank pump stop water level, the one general drainage tank pump 7A that was operating is stopped to stop discharging wastewater from the general drainage tank 2. In addition, the control unit H controls the kitchen drainage tank discharge means 8 so that, as the water level in the kitchen drainage tank 4 rises to the kitchen drainage tank pump operating water level, only one of the two kitchen drainage tank pumps 8A is operated to start discharging wastewater from the kitchen drainage tank 4, and as the water level in the kitchen drainage tank 4 drops to the kitchen drainage tank pump stop water level, the one kitchen drainage tank pump 8A that was operating is stopped to stop discharging wastewater from the kitchen drainage tank 4.

[0034] Moreover, the general drainage tank combined drainage control is a control executed in the general drainage tank combined drainage state. In the general drainage tank combined drainage control, the control unit H controls the general drainage tank discharge means 7 so that, as the water level in the general drainage tank 2 rises to the general drainage tank pump operating water level, both of the two general drainage tank pumps 7A are operated to start discharging the wastewater from the general drainage tank 2, and as the water level in the general drainage tank 2 falls to the general drainage tank pump stop water level, the two operating general drainage tank pumps 7A are stopped to stop discharging the wastewater from the general drainage tank 2. Moreover, the kitchen drainage tank combined drainage control is a control executed in the kitchen drainage tank combined drainage state. In the kitchen drainage tank combined drainage control, the control unit H controls the kitchen drainage tank discharge means 8 so that, as the water level in the kitchen drainage tank 4 rises to the kitchen drainage tank pump operating water level, both of the two kitchen drainage tank pumps 8A are operated to start discharging the drainage water from the kitchen drainage tank 4, and as the water level in the kitchen drainage tank 4 falls to the kitchen drainage tank pump stop water level, the two kitchen drainage tank pumps 8A that had been operating are stopped to stop discharging the drainage water from the kitchen drainage tank 4.

[0035] In this way, by switching the general drainage destination switching unit 12 from the normal drainage state to the general drainage branch state, the drainage system 1 can send general drainage to the kitchen drainage tank 4, and general drainage will no longer be sent to the general drainage tank 2 (the state becomes a general drainage tank combined drainage state), making it possible to perform maintenance work on the general drainage tank 2 while continuing to send general drainage to the drainage tank. Also, by switching the kitchen drainage destination switching unit 13 from the normal drainage state to the kitchen drainage branch state, kitchen drainage will no longer be sent to the kitchen drainage tank 4 (the state becomes a kitchen drainage tank combined drainage state), making it possible to perform maintenance work on the kitchen drainage tank 4 while continuing to send kitchen drainage to the drainage tank. Furthermore, since there is no need to prepare a separate drainage tank to continuously send general drainage or kitchen drainage during maintenance work, it is possible to reduce the manufacturing costs of the drainage system 1 compared to when a separate drainage tank is prepared.

[0036] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0037] (1) In the above embodiment, an example has been described in which the control performed by the control unit H is automatically switched based on detection information from the general drainage detection unit 22 and the kitchen drainage tank detection unit 23. However, the present invention is not limited to such a configuration. For example, the administrator who manages the drainage system 1 may check the status of the general drainage destination switching unit 12 and the kitchen drainage destination switching unit 13 and operate a control panel or the like to switch the control performed by the control unit H.

[0038] (2) In the above embodiment, an example has been described in which only some of the multiple general drainage tank pumps 7A (the number of pumps for normal general drainage) are operated in the normal drainage state, and all of the multiple general drainage tank pumps 7A (the number of pumps for combined general drainage) are operated in the general drainage tank combined drainage state. However, the number of pumps for normal general drainage in the normal drainage state and the number of pumps for combined general drainage in the general drainage tank combined drainage state may be changed as appropriate. For example, only one general drainage tank pump 7A may be provided, and only one general drainage tank pump 7A (number of pumps for normal general drainage and number of pumps for combined general drainage) may be operated in both the normal drainage state and the general drainage tank combined drainage state. Note that when only one general drainage tank pump 7A is provided in this manner, the general drainage tank pump 7A may be operated at a low speed in the normal drainage state and at a high speed in the general drainage tank combined drainage state, so that the amount of wastewater discharged per unit time may be changed between the normal drainage state and the general drainage tank combined drainage state. Also, for example, three or more general drainage tank pumps 7A may be provided as the multiple general drainage tank pumps 7A, and in the normal drainage state, only some of the three or more general drainage tank pumps 7A (for example, one or two general drainage tank pumps 7A) may be operated, and in the general drainage tank combined drainage state, a greater number of general drainage tank pumps 7A (for example, three general drainage tank pumps 7A) may be operated than the general drainage tank pumps 7A that were operating in the normal drainage state. Similarly, in the example described above, in the normal drainage state, only a portion of the multiple kitchen drainage tank pumps 8A (the number of units for normal kitchen drainage) are operated, and in the combined kitchen drainage tank drainage state, all of the multiple kitchen drainage tank pumps 8A (the number of units for combined kitchen drainage) are operated, but the number of units for normal kitchen drainage in the normal drainage state and the number of units for combined kitchen drainage in the combined general drainage tank drainage state may be changed as appropriate.

[0039] (3) In the above embodiment, an example was described in which the waterproof specifications were different between the inner surface of the general drainage tank 2 and the inner surface of the kitchen drainage tank 4. However, the waterproof specifications may be the same for the inner surface of the general drainage tank 2 and the inner surface of the kitchen drainage tank 4.

[0040] (4) In the above embodiment, the non-general drainage is kitchen drainage. However, the present invention is not limited to this configuration. For example, the non-general drainage may be drainage of a different type from the general drainage other than kitchen drainage. [Explanation of symbols]

[0041] 1. Drainage system 2 General drainage tank 3 General drainage canal 4 Kitchen drain tank (non-general drain tank) 5 Kitchen drain (non-general drain) 7 General drainage tank discharge means 8 Kitchen drain tank discharge means (non-general drain tank discharge means) 10 General drainage branch 11 Kitchen drainage branch (non-general drainage branch) 12 General wastewater destination switching unit 13 Kitchen wastewater destination switching unit (non-general wastewater destination switching unit) H control section

Claims

1. a general drainage channel for sending general wastewater to a general drainage tank; a kitchen drainage channel that sends kitchen wastewater to a kitchen wastewater tank; a general drainage branch line that branches off from the general drainage line and sends the general drainage to the kitchen drainage tank; a kitchen drainage branch channel that branches off from the kitchen drainage channel and sends the kitchen drainage to the general drainage tank; a general drainage destination switching unit that is provided at a branch point from the general drainage channel to the general drainage branch channel and that can be switched between a general drainage normal state in which the general drainage channel is sent to the general drainage tank and a general drainage branch state in which the general drainage channel is sent to the kitchen drainage tank; A drainage system comprising a kitchen drain destination switching unit provided at the branch point from the kitchen drainage channel to the kitchen drainage branch channel, which can be freely switched between a normal kitchen drain state in which the kitchen drainage destination is the kitchen drainage tank, and a kitchen drainage branch state in which the kitchen drainage destination is the general drainage tank.

2. a general drainage tank discharge means including a plurality of general drainage tank pumps for discharging drainage water from the general drainage tank; a kitchen drainage tank discharge means having a plurality of kitchen drainage tank pumps for discharging drainage water from the kitchen drainage tank; In a normal drainage state in which the general drainage tank is supplied with the general drainage tank and the kitchen drainage tank is supplied with the kitchen drainage tank, the general drainage tank discharge means operates a number of general drainage tank pumps that are a part of the plurality of general drainage tank pumps and are for normal general drainage to discharge the drainage from the general drainage tank, and the kitchen drainage tank discharge means operates a number of kitchen drainage tank pumps that are a part of the plurality of kitchen drainage tank pumps and are for normal kitchen drainage to discharge the drainage from the kitchen drainage tank, In a general drainage tank combined drainage state in which both the general drainage and the kitchen drainage are sent to the general drainage tank, the general drainage tank discharge means operates a number of the general drainage tank pumps for combined general drainage that is greater than the number of the general drainage pumps for normal general drainage, among the plurality of general drainage tank pumps, to discharge drainage from the general drainage tank, The drainage system of claim 1, wherein in a combined kitchen drainage tank drainage state in which both the general drainage and the kitchen drainage are sent to the kitchen drainage tank, the kitchen drainage tank discharge means is configured to discharge wastewater from the kitchen drainage tank by operating a number of kitchen drainage tank pumps for combined kitchen drainage that is greater than the number of kitchen drainage pumps for normal kitchen drainage among the plurality of kitchen drainage tank pumps.

3. a control unit for controlling the general drainage tank discharge means and the kitchen drainage tank discharge means; The drainage system described in claim 2, wherein the control unit determines whether the drainage state is normal, the general drainage tank combined drainage state, or the kitchen drainage tank combined drainage state based on the switching state of the general drainage destination switching unit and the kitchen drainage destination switching unit, and controls the general drainage tank discharge means and the kitchen drainage tank discharge means.

4. The kitchen wastewater is high-temperature wastewater having a higher wastewater temperature than the general wastewater, The drainage system according to any one of claims 1 to 3, wherein both the inner surface of the general drainage tank and the inner surface of the kitchen drainage tank are constructed to be waterproof to withstand high-temperature drainage.

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