JP6219766B2 - Pressure drainage system - Google Patents

Description

  The present invention relates to a pressure drainage system.

  There is a pumping drainage system in which drainage discharged from sanitary equipment such as a toilet installed inside a building is temporarily stored in a drainage tank and then pumped by a pump. Since this drainage tank has a sealed structure, the air pressure in the drainage tank fluctuates at the time of drainage inflow or drainage discharge. Therefore, in order to alleviate the fluctuation of the air pressure, in the conventional pumping and draining system, a vent pipe is provided in the drain tank, and the air in the drain tank is released to the outside through the vent pipe.

  However, when the above-described pressure-feeding / draining system is installed in an existing apartment house such as a condominium, a large-scale construction may be required because the vent pipe is extended to communicate indoors and outdoors. In view of this, there has been proposed a pressure drainage system in which a telescopic container is provided indoors, and the telescopic container is provided for each drainage tank so as to reduce fluctuations in air pressure in the drainage tank without communicating indoors and outdoors. (Patent Document 1).

Japanese Patent No. 4396933

  However, in the pressure-feed drainage system described in Patent Document 1, when draining wastewater from a plurality of sanitary equipment facilities such as a toilet and a unit bath, it is necessary to connect an extendable container to each drainage tank of the plurality of sanitary equipment facilities. The volume of the telescopic container is as large as the volume of the drainage tank at the maximum. Therefore, when the number of drainage tanks increases, the installation location of the telescopic container also increases.

  This invention is made | formed in view of such a situation, The objective is to provide the pumping drainage system which can reduce the installation place of an extendable container, without connecting indoors and outdoors.

  One aspect of the present invention is a pumping drainage system including a plurality of drainage tanks that temporarily store drainage discharged from a sanitary equipment facility installed in a building and then pump the pumping with a pump. And a telescopic container connected to at least one of the plurality of drainage tanks or the vent pipe, and the number of the telescopic containers is the number of the drainage tanks. It is a pressure drainage system characterized by being less than the total number.

One aspect of the present invention is the above-described pressure-feeding drainage system, and when the water levels of at least two or more drainage tanks out of the plurality of drainage tanks exceed the second water level at substantially the same timing, The operation of the pumps is sequentially shifted.

One aspect of the present invention is the above-described pressure drainage system, wherein the first water level in which the water level of at least two of the plurality of drainage tanks is lower than the second water level . When it falls below at substantially the same timing, the stoppage of the pump in the drainage tank is sequentially shifted.

  One aspect of the present invention is the above-described pressure-feed drainage system, and when any internal pressure in the drain tank exceeds a predetermined value, one of the pumps in the plurality of drain tanks is started.

  As described above, according to the present invention, it is possible to provide a pressure-feeding / draining system that can reduce the installation location of an extendable container without communicating indoors and outdoors.

It is a figure which shows the structural example of the pumping drainage system of 1st Embodiment. It is a flowchart figure which shows the basic operation | movement of the pumping / draining system 1 of 1st Embodiment. It is a flowchart explaining the 1st operation | movement of the pumping drainage system 1 of 1st Embodiment. It is a flowchart explaining the 2nd operation | movement of the pumping drainage system 1 of 1st Embodiment. It is a figure explaining the pumping drainage system 1 effect of a 1st embodiment. It is a figure which shows the internal pressure at the time of the driving | operation start of one pump 6, or an operation stop. It is a figure which shows the structural example of the pumping drainage system of 2nd Embodiment. It is a figure which shows the structural example of the pumping drainage system of 3rd Embodiment.

(First embodiment)
Hereinafter, the pressure drainage system of the 1st embodiment of the present invention is explained with reference to figures. FIG. 1 is a diagram illustrating a configuration example of a pressure drainage system 1 according to the first embodiment.

The pumping drainage system 1 includes sanitary equipment 2 (2-1 to 2-4), a drainage tank 3 (3-1 to 3-3), an inflow pipe 4 (4-1 to 4-2), and expansion and contraction. It has a universal container 20 and a control device 30.
The pumping / draining system 1 of the first embodiment includes an inflow pipe 4 (4-1 to 4-3) from a plurality of sanitary equipment facilities 2 (2-1 to 2-4) such as a toilet installed inside a building. The drainage discharged through the tank is temporarily stored in the drainage tank 3 (3-1 to 3-3) and then pumped.

The sanitary equipment 2 is, for example, a toilet, a bath, a wash basin, a sink, a kitchen, and a washing machine installed inside a building such as an apartment house. The sanitary equipment 2-1 and the drain tank 3-1 are connected by an inflow pipe 4-1. The wastewater discharged from the sanitary equipment facility 2-1 flows into the drainage tank 3-1 through the inflow pipe 4-1, and is temporarily stored.
The sanitary equipment 2-2 and the drainage tank 3-2 are connected by an inflow pipe 4-2. The wastewater discharged from the sanitary equipment facility 2-2 flows into the drainage tank 3-2 through the inflow pipe 4-2 and is temporarily stored.
The sanitary equipment 2-3 and the drainage tank 3-2 are connected by an inflow pipe 4-3. The waste water discharged from the sanitary ware equipment 2-3 flows into the drain tank 3-2 through the inflow pipe 4-3 and is temporarily stored.
The sanitary equipment 2-4 and the drainage tank 3-3 are connected by an inflow pipe 4-4. The wastewater discharged from the sanitary equipment 2-4 flows into the drainage tank 3-3 through the inflow pipe 4-4 and is temporarily stored.

Each of the drainage tanks 3 is connected to a vent pipe 10 communicating with the telescopic container 20 at a predetermined position in the upper part. That is, since each of the drainage tanks 3 and the telescopic container 20 are communicated with each other through the vent pipe 10, the inside of each of the drainage tanks 3 and the telescopic container 20 is kept at the same pressure.
The vent pipe 10 is a pipe made of metal or synthetic resin, a tube made of synthetic resin or rubber, or the like.
The drainage tank 3-1 includes a water level sensor 5-1, a pump 6-1, a discharge pipe 7-1 connected to the pump 6-1, and a pressure sensor 8.
The drainage tank 3-2 includes a water level sensor 5-2, a pump 6-2, and a discharge pipe 7-2 connected to the pump 6-2.
The drainage tank 3-3 includes a water level sensor 5-3, a pump 6-3, and a discharge pipe 7-3 connected to the pump 6-3.

The water level sensors 5 (5-1 to 5-3) are connected to the control device 30. The water level sensor 5 detects the water level of the waste water in the drain tank 3 and outputs the detected water level to the control device 30 at a constant cycle.
For example, the water level sensor 5 has a float that moves up and down according to the water level, uses a pressure sensor that measures the water pressure received from the stored drainage, irradiates a laser or ultrasonic wave toward the water surface, and based on the reflection For detecting the water level, and for detecting the water level by measuring the capacitance using the dielectric constant difference between water and air.

The pumps 6 (6-1 to 6-3) are installed inside each drainage tank 3. Each of the pumps 6 is connected to the control device 30. When the pump 6 receives the control signal from the control device 30, the pump 6 pumps the wastewater stored in the drainage tank 3 provided with the pump 6 to the outside such as a sewer through the discharge pipe 7-1.
The pressure sensor 8 is installed inside the drainage tank 3-1. The pressure sensor 8 is connected to the control device 30. The pressure sensor 8 detects the internal pressure (hereinafter referred to as “internal pressure”) of the drainage tank 3-1 as a gauge pressure, and outputs the detected internal pressure to the control device 30. The pressure sensor 8 is arranged to detect the internal pressure of the drainage tank 3, and need not necessarily be arranged inside the drainage tank 3-1. For example, the pressure sensor 8 may be any one of the drain tanks 3-1 to 3-3, the telescopic container 20, and the vent pipe 10. In the present embodiment, the pressure measured by the pressure sensor 8 is used as the internal pressure.

  The telescopic container 20 is a sealed telescopic container connected to at least one of the plurality of drain tanks 3 or the vent pipe 10. The telescopic container 20 can freely change the air storage volume. The portion of the expandable container 20 that is connected to the vent pipe 10 is an opening. The telescopic container 20 is exposed and installed outside the drainage tank 3. Alternatively, the telescopic container 20 is installed in an indoor maintainable space.

  In the telescopic container 20, air moves between the drain tank 3 and the telescopic container 20 as the water level of the drainage in the drain tank 3 changes. The telescopic container 20 is freely deformed in conjunction with the movement of the air. As a result, when the wastewater discharged from the sanitary ware equipment 2 flows into the drainage tank 3 or when the wastewater stored in the drainage tank 3 is pumped outside by the pump 6 through the discharge pipe 7, the drainage tank 3. Even if the internal air pressure fluctuates, the air in the drainage tank 3 can be taken in and out. The material of the stretchable container 20 can be, for example, a thin synthetic resin or rubber that has low resistance when expanding and contracting and that is corrosion resistant to odors and harmful substances. The telescopic container 20 is installed in a space where it can be maintained separately from the drainage tank 3, so that it can be easily replaced when it is deteriorated, and maintenance work is easy.

The control device 30 has a plurality of input ports. At least a water level sensor 5-1, a water level sensor 5-2, a water level sensor 5-3, and a pressure sensor 8 are connected to the input port of the control device 30. At least the pump 6-1, the pump 6-2, and the pump 6-3 are connected to the output port of the control device 30. The control device 30 is an arithmetic device including a storage device (not shown), a CPU (Central Processing Unit), an input / output port, and the like.
The control device 30 transmits a control signal to the pump 6 based on the water level of the drainage in the drainage tank 3. Thereby, the control device 30 controls driving or stopping of the pump 6. Further, the control device controls driving or stopping of the pump 6 based on the internal pressure.

When the water levels in the plurality of drain tanks 3 exceed the second water level L2 at substantially the same timing, the control device 30 sequentially shifts the operations of the pumps 6 in the plurality of drain tanks. That is, the operation timing is assigned so that the start time is separated by a certain time or more. Further, when the water levels of the plurality of drain tanks 3 are lower than the first water level L1 (L1 <L2) at substantially the same timing, the control device 30 sequentially shifts the pumps in the plurality of drain tanks. That is, the stop timing is assigned so that the stop time is more than a certain time. Note that the first water level L1 is a water level used for stopping the pumping of the drainage stored in the drainage tank 3. The second water level L <b> 2 is a water level used for pumping the wastewater stored in the drainage tank 3. The order of the pump 6 that sequentially shifts the operation or stop every predetermined time is set in advance, and is determined according to the sanitary ware equipment 2, for example. For example, in the kitchen and toilet, since the toilet has a larger amount of drainage per unit time, the pump 6 in the drainage tank 3 connected to the toilet is driven first.
When the internal pressure in the drainage tank 3 exceeds a predetermined value, the control device 30 starts one of the pumps 6 in the plurality of drainage tanks 3.

Next, the basic operation of the pumping / draining system 1 of the present embodiment will be described with reference to the drawings. FIG. 2 is a flowchart showing the basic operation of the pressure drainage system 1 of the present embodiment.
In step S <b> 101, the control device 30 acquires the water level detected by each of the water level sensors 5 for each water level sensor 5 at a constant period.
In step S102, the control device 30 obtains the water level (hereinafter referred to as “acquired water level”) L from each of the water level sensors 5, the acquired water level L <the first water level L1, and the first water level L1 ≦ the acquired water level. It is determined which of the four ranges of L <second water level L2, second water level L2 ≦ acquired water level L <third water level L3, and third water level L3 ≦ acquired water level L.

  In step S103, when the acquired water level L is lower than the first water level L1 (acquired water level L <first water level L1), the control device 30 is a pump disposed in the drainage tank 3 where the acquired water level L is measured. 6 does not output a control signal. Therefore, the pump 6 to which no control signal is output stops its operation. When the acquired water level L is equal to or higher than the second water level L1 and lower than the second water level L2 (first water level L1 ≦ acquired water level L <second water level L2), the control device 30 has a drainage tank 3 of the acquired water level L. The driving or stopping of the pump 6 arranged in the above is maintained. Therefore, the pump 6 maintains the current state (driving or stopping).

  When the acquired water level L is equal to or higher than the second water level L2 and lower than the third water level L3 (second water level L2 ≦ acquired water level L <third water level L3), the control device 30 supplies the drainage tank 3 of the acquired water level. A control signal is output to the arranged pump 6. Therefore, the pump 6 starts operation. The third water level L3 is a water level indicating that the drainage stored in the drainage tank 3 is full.

  When the acquired water level is equal to or higher than the third water level L3 (third water level L3 ≦ acquired water level L), the control device 30 stops the sanitary equipment facility 2 from draining into the drainage tank 3. Thereby, the control apparatus 30 suppresses that an internal pressure rises.

  Next, an operation when the water level obtained from each of the plurality of pumps 6 exceeds the second water level L2 at substantially the same timing (hereinafter referred to as “first operation”) will be described. FIG. 3 is a flowchart for explaining a first operation of the pumping / draining system according to the first embodiment.

  FIG. 3A shows a state in which the sanitary equipment 2-3 and the sanitary equipment 2-4 are drained into the drainage tank 3-2 and the drainage tank 3-3. FIG.3 (b) shows the state which pump 6-2 pumps the waste_water | drain currently stored in the inside of the waste_water | drain tank 3-2. FIG.3 (c) shows the state which pump 6-3 pumps the waste_water | drain currently stored in the inside of the waste_water | drain tank 3-3. It is assumed that the internal pressure does not exceed a predetermined value.

  First, as shown to Fig.3 (a), for example, the sanitary ware equipment 2-3 drains to the drainage tank 3-2, and the sanitary ware equipment 2-4 drains to the drainage tank 3-3. Then, the water level of the drainage tank 3-2 and the drainage tank 3-3 rises. At this time, since the internal pressure rises, the telescopic container 20 swells as the water level of the drainage tank 3 rises.

  The control device 30 acquires the water level detected by each of the water level sensors 5 and the measurement results of each of the water level sensors 5 at a constant period. When it is determined that the acquired water level has exceeded the second water level L2 at substantially the same timing (within a range shorter than the predetermined time interval) from the water level sensor 5-2 and the water level sensor 5-3, A control signal is transmitted to the pump 6-2. Therefore, when receiving the control signal from the control device 30, the pump 6-2 pumps the wastewater stored in the drainage tank 3-2 (FIG. 3B).

  And the control apparatus 30 transmits a control signal to the pump 6-3 after a fixed time. Therefore, when receiving the control signal from the control device 30, the pump 6-3 pumps the wastewater stored in the drainage tank 3-3 (FIG. 3C). Thereby, it is prevented that the several pump 6 starts a pumping simultaneously. Further, since the internal pressure is reduced by the pumping of the drainage in the drainage tank 3, the telescopic container 20 is deflated.

  Next, an operation when the internal pressure exceeds a predetermined value (hereinafter referred to as “second operation”) will be described. FIG. 4 is a flowchart for explaining a second operation of the pumping / draining system according to the first embodiment. FIG. 4A shows a state where the sanitary equipment 2-3 drains into the drain tank 3-2 and the internal pressure exceeds a predetermined value. FIG. 4B shows a state in which the pump 6-1 pumps the wastewater stored in the drainage tank 3-1. 4 (c) shows a state in which the pump 6-2 pumps the wastewater stored in the drainage tank 3-2.

  First, as shown in FIG. 4A, for example, when the sanitary equipment 2-3 drains into the drainage tank 3-2, the water level of the drainage tank 3-2 rises. At this time, since the internal pressure rises at the same time as the water level rises, the telescopic container 20 swells.

  The control device 30 acquires the water level detected by each of the water level sensors 5 for each water level sensor 5 at a constant period. Further, the control device 30 acquires the internal pressure detected by the pressure sensor 8. The control device 30 calculates a water level subtraction value for each drainage tank 3 when the acquired water level L from the water level sensor 5-2 is equal to or lower than the second water level L2 and the internal pressure becomes equal to or higher than a predetermined value. The water level subtraction value is a value obtained by subtracting the first water level L1 from the acquired water level L.

  The control device 30 compares the water level subtraction value for each drainage tank 3. However, when the control device 30 outputs a control signal to at least one of the pumps 6, the control device 30 excludes the water level subtraction value of the drainage tank 3 in which the pump 6 outputting the control signal is disposed from the comparison target. . That is, the control device 30 compares the water level subtraction value for each drainage tank in which the pump 6 that is not in operation is disposed. And the control apparatus 30 outputs a control signal to the pump 6-1 of the drainage tank 3-1 having the largest water level subtraction value. Therefore, when receiving the control signal from the control device 30, the pump 6-1 pumps the wastewater stored in the wastewater tank 3-1 (FIG. 4B). The control device 30 stops transmitting the control signal to the pump 6-1 when the internal pressure becomes less than a predetermined value. Moreover, the control apparatus 30 may stop transmitting a control signal to the pump 6-1 when a fixed time elapses.

  When the acquired water level L exceeds the second water level L2 from the water level sensor 5-2, the control device 30 transmits a control signal to the pump 6-2. Therefore, when receiving the control signal from the control device 30, the pump 6-2 pressure-feeds the wastewater stored in the drainage tank 3-2 to the outside (FIG. 4C). In addition, since the internal pressure is reduced by the pumping of the drainage in the drainage tank 3, the telescopic container 20 is deflated.

Next, the effect of this embodiment will be described. FIG. 5 is a diagram illustrating the internal pressure and the internal volume. FIG. 5A shows that the pressure of the air in the drain tank is P ₀ and the volume of the air is the sum of the volume Va ₀ of the telescopic container and the volume V _{0 of the} drain tank. FIG.5 (b) is a figure which shows that the waste_water | drain from sanitary ware equipment was discharged | emitted by the drainage tank. As shown in FIG. 5 (b), the internal pressure _{P 1.} Further, the drainage in the drainage tank shown in FIG. 5 (b) increased by ΔV compared to FIG. 5 (a). As the amount of drainage in the drainage tank increased by ΔV, that ΔV of air moved to the telescopic container, and the volume of the telescopic container increased by αΔV. Α is a resistance coefficient of the telescopic container and takes a value from 0 to 1. When α is 0, the telescopic container does not expand and contract. On the other hand, when α is 1, the expandable container expands and contracts without resistance.

An air pressure change ΔP due to the drainage stored in the drainage tank is calculated. When the temperature of air is constant, the equation of state of air can be expressed by equation (1) from Boyle's law.
P ₀ (V ₀ + V _a0 ) = P ₁ (V ₀ −ΔV + V _a0 + αΔV) (1)
The air pressure change ΔP due to the drainage stored in the drainage tank can be obtained by the following equation (2). Therefore, substituting Equation (1) to the pressure P ₁ of the air of the formula (2), the pressure change ΔP of the air can be determined by the formula shown in Equation (3).
ΔP = P ₁ −P ₀ (2)
ΔP = P ₀ (1−α) ΔV / {(V ₀ + V _a0 ) − (1−α) ΔV} (3)

As shown in Expression (3), the change in air pressure ΔP (hereinafter referred to as “air pressure change ΔP”) due to the storage of the wastewater in the drainage tank is proportional to the increase or decrease in the drainage ΔV in the drainage tank. That is, when the water level of the wastewater stored in the drainage tank rises, the air pressure change ΔP increases. On the other hand, when the water level of the drainage stored in the drainage tank decreases, the air pressure change ΔP decreases. The air pressure change ΔP is inversely proportional to the volume V _{0 of the} drain tank. That is, by increasing the volume V _{0 of the} drain tank, the volume of air is increased and the pressure change ΔP of the air can be reduced.

  In the conventional pressure-feeding drainage system, a telescopic container is connected to an independent drainage tank for each of a plurality of sanitary equipment facilities, thereby reducing fluctuations in air pressure in the connected drainage tanks. However, in the pressure drainage system of the present embodiment, by providing the ventilation pipes 10 for communicating each air in the drainage tank 3, the volume of the air is the drainage tank 3-1, the drainage tank 3-2, and the drainage tank 3. -3 and the total volume. As a result, the volume of the air in the drainage tank becomes larger than that of the conventional pressure-feeding drainage system, and the air pressure change ΔP can be reduced. Moreover, in the pressure drainage system of this embodiment, since the air pressure change ΔP is reduced by increasing the volume of air in the drainage tank, the volume of the telescopic container can be reduced as compared with the conventional pressure drainage system. . That is, the space occupied by the telescopic container can be reduced.

  Moreover, FIG. 6 is a figure which shows the change of the internal pressure at the time of the driving | operation start of one pump 6, or an operation stop. In FIG. 6, the horizontal axis represents time (seconds), and the vertical axis represents internal pressure (Pa). In FIG. 6, the solid line indicates the actually measured value of the internal pressure, and the dotted line indicates the theoretical value of the internal pressure.

  As shown in FIG. 6, when drainage flows into the drainage tank, the control device 30 starts or stops the pump 6 according to the water level from the water level sensor. At that time, when the pump 6 is started, a positive internal pressure higher than the theoretical value is generated. Further, when the pump 6 is stopped, a negative internal pressure higher than the theoretical value is generated.

  Therefore, if the plurality of pumps 6 are started or stopped at substantially the same timing, that is, when a sudden change in internal pressure occurs, for example, within less than 0.5 seconds in the system shown in FIG. The peaks of internal pressure at the time of stop overlap. That is, when all the three pumps 6 are started at substantially the same timing, an internal pressure fluctuation that is three times the internal pressure fluctuation during the single operation of the pump 6 occurs in the drainage tank 3. If the internal pressure fluctuation exceeds ± 250 Pa, for example, the sealing water of the trap of the sanitary equipment 2 may be broken.

  In the first embodiment, when the acquired water level L exceeds the second water level L2 from each of the plurality of pumps 6 at substantially the same timing, the control device 30 transmits a control signal to each of the plurality of pumps 6. This is sequentially delayed at regular intervals. The fixed time is, for example, a time during which peaks of internal pressure fluctuations at the time of starting or stopping the plurality of pumps 6 do not overlap, and is about 0.5 seconds. Thereby, the peaks of fluctuations in the internal pressure fluctuation at the start and stop of the pump 6 do not overlap. That is, the internal pressure fluctuation caused by starting or stopping the plurality of pumps 6 at substantially the same timing can be suppressed, and the sealing water in the trap of the sanitary equipment facility 2 due to the internal pressure fluctuation can be prevented from being broken.

  In the first embodiment, when the water from the sanitary equipment is drained into the drainage tank, the internal pressure rises, and when the internal pressure exceeds a predetermined value, the drainage tank with a small water level subtraction value. 3 pump 6 is driven. As a result, the control device 30 increases the internal pressure even when the internal water pressure rises to such an extent that the sealing water in the trap of the sanitary ware equipment 2 is broken before the acquired water level L becomes equal to or higher than the second water level L2. And can prevent the sealing water from being broken.

(Second Embodiment)
Next, the pressure drainage system 1A of the second embodiment will be described. In addition, the same code | symbol is attached | subjected to the structure similar to FIG. Hereinafter, differences in configuration and operation from the first embodiment will be described.

FIG. 7 is a diagram illustrating a configuration example of a pressure drainage system 1A according to the second embodiment. The pressure drainage system 1 </ b> A includes a sanitary equipment facility 2, a drainage tank 3, an inflow pipe 4, a telescopic container 21, a telescopic container 22, and a control device 30.
Each of the drainage tanks 3 is connected to a vent pipe 11 at a predetermined position in the upper part. Accordingly, each air in the drainage tank 3 can be moved through the vent pipe 11. Further, the drainage tank 3-2 is connected to a vent pipe 12 communicating with the telescopic container 21 at a predetermined position on the upper part. The drainage tank 3-3 is connected to a vent pipe 13 communicating with the telescopic container 22 at a predetermined upper position.

  The stretchable container 21 and the stretchable container 22 are sealed and stretchable bags, like the stretchable container 20, and can freely change the volume for storing air. However, the volume of each of the telescopic container 21 and the telescopic container 22 is smaller than the volume of the telescopic container 20 (see FIG. 1).

The portion of the expandable container 21 that is connected to the vent pipe 12 is an opening. The telescopic container 21 is exposed and installed outside the drainage tank 3. In the telescopic container 21, air moves through a vent pipe between the drain tank 3-2 and the telescopic container 21 as the water level of the drainage in the drain tank 3 changes. The telescopic container 21 is freely deformed in conjunction with the movement of the air.
The portion of the expandable container 22 that is connected to the vent pipe 13 is an opening. The telescopic container 22 is exposed and installed outside the drainage tank 3. In the telescopic container 22, air moves through a vent pipe between the drain tank 3-3 and the telescopic container 22 as the level of drainage in the drain tank 3 changes. The telescopic container 22 is freely deformed in conjunction with the movement of the air.

In the present embodiment described above, each of the drain tanks 3 communicates with the vent pipe 11. Further, the drainage tank 3-2 communicates with the extendable container 21 and the vent pipe 12. The drain tank 3-3 communicates with the telescopic container 22 and the vent pipe 13. For this reason, the inside of each of the drainage tank 3, the telescopic container 21 and the telescopic container 22 are all kept at the same pressure.
Note that the basic operation, the first operation, and the second operation of the present embodiment are the same as those of the first embodiment, and a description thereof will be omitted.

  As described above, in this embodiment, the same effect as that of the first embodiment can be obtained. In addition, when a pumping drainage system is introduced into an existing house such as a condominium, even if there is not enough space to install the telescopic container 20 inside the existing house, if there are a plurality of spaces, it is more than the telescopic container 20 A retractable container 21 and a retractable container 22 having a small volume can be disposed. Therefore, the freedom degree of the installation position of an extendable container becomes high.

(Third embodiment)
Next, the pressure drainage system 1B of 3rd Embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the structure similar to FIG.1 and FIG.7. Hereinafter, differences in configuration and operation from the first embodiment and the second embodiment will be described.

  The pressure drainage system 1 </ b> B includes a sanitary appliance facility 2, a drainage tank 3, an inflow pipe 4, a telescopic container 21, a telescopic container 22, and a control device 30.

  Each of the drainage tanks 3 is connected to a vent pipe 14 communicating with the telescopic container 21 at a predetermined position in the upper part. Further, the drainage tank 3-3 is connected to a vent pipe 13 communicating with the telescopic container 22 at a predetermined position on the upper part. That is, each of the drainage tanks 3, the telescopic container 21, and the telescopic container 22 are in communication with each other, so that the interior of each of the drainage tanks 3, the telescopic container 21 and the telescopic container 22 is kept at the same pressure. It is. Since the basic operation, the first operation, and the second operation of this embodiment are the same as those of the first embodiment, description thereof is omitted.

  As described above, in this embodiment, the same effect as that of the first embodiment can be obtained, and furthermore, the number of vent pipes is smaller than that of the second embodiment, so that the pumping is performed in a narrower space. A drainage system can be applied. Therefore, the degree of freedom of the installation position of the telescopic container is increased as compared with the second embodiment.

In addition, this invention is not restricted to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, what added the various change to the above-mentioned embodiment is included.
For example, in the above-described embodiment, a valve may be provided between the telescopic container and the drain tank 3. From this, when you want to replace the telescopic container, such as when the telescopic container is damaged, replace the telescopic container by closing the valve without releasing the odor of the wastewater stored in the drainage tank 3 to the outside. can do.

  For example, in the above-described embodiment, a vent valve may be provided in any of the drainage tanks 3. Thereby, when internal pressure becomes negative pressure, it can prevent that the sealing water by a negative pressure is torn by taking in air from a ventilation valve.

  In the above-described embodiment, the pressure sensor 8 can be replaced with a sensor that measures the size of the telescopic container. This is because the volume of the retractable container and the air pressure change ΔP due to the drainage stored in the drainage tank are both proportional to the amount of change ΔV in the drainage tank.

  Further, for example, in the above-described embodiment, the third water level L3 is a water level indicating that the drainage stored in the drainage tank 3 is full, but is not limited thereto. For example, the water level that hinders the drainage of the sanitary equipment 2 such as the height of the sealing water of the trap of the sanitary equipment 2 and the water level indicating that the drainage stored in the drainage tank 3 is full. The lower water level may be set as the third water level L3.

DESCRIPTION OF SYMBOLS 1 Pressure drainage system 2 Sanitary ware equipment 3 Drain tank 4 Inflow pipe 5 Water level sensor 6 Pump 7 Discharge pipe 8 Pressure sensor 10-15 Vent pipe 20-22 Telescopic container 30 Control apparatus

Claims (4)

A pumping and drainage system comprising a plurality of drainage tanks that temporarily store drainage discharged from sanitary equipment installed in a building and then pump it with a pump.
A vent pipe communicating between the plurality of drainage tanks;
A telescopic container connected to at least one of the plurality of drainage tanks or the vent pipe;
Have
The number of the extendable containers is less than the total number of the drain tanks. The operation of the pump in the drainage tank is sequentially shifted when the water level of at least two of the drainage tanks exceeds the second water level at substantially the same timing among the plurality of drainage tanks. The pumping drainage system described in When the water levels of at least two of the plurality of drain tanks are below the first water level that is lower than the second water level at substantially the same timing, the pumps in the drain tanks are stopped. 3. The pressure drainage system according to claim 2, which is sequentially shifted.   4. The pump according to claim 1, wherein when the internal pressure in the drainage tank exceeds a predetermined value, one of the pumps in the plurality of drainage tanks is started. 5. Pressure drainage system.

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