JP6626401B2 - Negative pressure suction toilet - Google Patents

Description

  The present invention relates to a negative pressure suction toilet.

  For example, Japanese Patent Application Laid-Open No. 2014-125719 proposes a negative pressure suction toilet. The negative pressure suction toilet proposed in this publication uses a bottomed container having a drain port at the bottom as a toilet body, and a drain pipe is provided in the toilet body. The drainage line has a rising portion in which the bottom of the drainage line is set at the height so that the height of the drainage accumulated in the toilet body is regulated to a predetermined height. It is provided. Such a drain pipe is connected to a negative pressure tank. The negative pressure tank is a container having a required pressure resistance, and is provided with a vacuum pump. In the negative pressure suction type toilet proposed here, the drainage collected in the toilet bowl is drained through the drainage line by opening the negative pressure tank and the drainage line with the negative pressure tank having a predetermined vacuum formed. Can be drawn into negative pressure tank. The negative pressure tank is disposed on a sewage pipe or a sewage tank. The drainage drawn into the negative pressure tank is configured to be discharged to a sewage pipe or a sewage tank.

JP 2014-125719 A

  In some cases, the drainage pipe is provided with an upward pipe extending upward from the toilet body to the negative pressure tank. In such an upstream pipe portion, since the resistance of the drainage increases, the drainage may remain during suction. The residual wastewater flows backward and accumulates in the lower part of the up pipe part and the upstream side thereof. At this time, if the remaining drainage accumulates to block the drainage line, the next time when suctioning, the negative pressure of the negative pressure tank acts on the drainage collected to block the drainage line, causing It becomes difficult to act on accumulated drainage. Then, negative pressure energy is consumed to draw in the drainage that has accumulated so as to close the drainage pipeline.

  The proposed vacuum suction toilet has a toilet bowl having a drain port at the bottom, a negative pressure tank having a suction port, a drain pipe connected to the drain port and the suction port, and extending from the drain port to the suction port. And a vacuum pump connected to the negative pressure tank. The drainage pipe is provided at one end of the drainage pipe connected to the drainage port, and extends upward from the drainage port to a predetermined height of the toilet, and from the toilet to the negative pressure tank. In the flow direction of the drain water, the upstream pipe portion provided downstream of the rising portion and a receiving portion disposed immediately upstream of the upstream pipe portion and having a larger volume than the upstream pipe portion. . In this case, the drainage remaining in the up pipe at the time of suction flows down the up pipe and flows into the receiving section after the suction is completed. At this time, since the receiving portion has a larger volume than the upward pipe portion, the receiving portion is not filled with the drainage flowing down the upward pipe portion. Then, the negative pressure in the negative pressure tank easily acts on the drainage accumulated in the toilet.

  The cross-sectional area of the receiving section perpendicular to the pipe axis of the drainage pipe may be wider than the cross-sectional area of the upgoing pipe section perpendicular to the pipe axis of the drainage pipe. In this case, the drainage pipe in the receiving portion can be shortened.

  The receiving part may be a pipe in which the pipe axis is arranged horizontally. The horizontal arrangement of the pipe shaft makes it difficult for the receiving portion to be filled with the drainage even if the drainage flows from the upward pipe portion into the receiving portion. Further, the drainage pipe in the receiving portion may be a circular pipe having a circular cross section orthogonal to the pipe axis. The circular tube has a uniform cross section, so it can be installed without worrying about the top and bottom of the cross section. Therefore, the workability is good.

  The receiving part may be a deformed pipe in which, in a cross section orthogonal to the pipe axis, an area below the center in the height direction on the inner surface of the pipe is wider than above. According to such a deformed conduit, the area below the center in the height direction on the inner surface of the conduit is wider than the upper part. Therefore, even if drainage flows from the up pipe to the receiving part, a gap is formed at the upper part of the receiving part. Easy to occur.

  In the case where the cross-sectional shape orthogonal to the pipe axis is the same in the receiving section and the upgoing pipe section, the receiving section may be longer than the upgoing pipe section. This may embody the configuration of the receiving portion having a larger volume than the up pipe portion.

  The receiving section may be arranged in parallel on the side of the drainage pipe in the receiving section, and may have a bypass pipe horizontally connected to the drainage pipe in the receiving section. By having such a bypass pipe, the drain pipe in the receiving portion can be shortened.

  The receiving part may be arranged on the side of the drainage line in the receiving part, and may have an intermediate tank connected horizontally to the drainage line in the receiving part. By having such an intermediate tank, the drainage line in the receiving portion can be shortened.

  The drain pipe may have a plurality of up pipes. In this case, it is preferable that a receiving portion is provided for each of the upstream pipe portions.

FIG. 1 is a perspective view schematically showing a state in which a toilet of a negative pressure suction type toilet is arranged in a room on the second floor of a two-story house. FIG. 2 is a side view schematically showing the flow path of the drainage pipe of the negative pressure suction type toilet. FIG. 3 is a plan view schematically showing a receiving portion provided with a bypass conduit. FIG. 4 is a plan view schematically showing a receiving portion provided with an intermediate tank.

  Hereinafter, a negative pressure suction type toilet according to one embodiment of the present invention will be described with reference to the drawings. The embodiments and examples described here exemplify a preferred embodiment of the present invention, but do not limit the present invention unless otherwise specified.

  FIG. 1 is a perspective view schematically showing a state in which a toilet of a negative pressure suction type toilet is arranged in a room on the second floor of a two-story house. FIG. 2 is a side view schematically showing the flow path of the drainage pipe of the negative pressure suction type toilet.

  The basic configuration of the negative pressure suction toilet is also described in Japanese Patent Application Laid-Open No. H11-157, and therefore, a duplicate description will be omitted here. As shown in FIGS. 1 and 2, the negative pressure suction type toilet 10 includes a toilet 11, a negative pressure tank 12, a drain pipe 13, and a vacuum pump 14.

  The toilet 11 is placed indoors near a bed 20, for example, as shown in FIG. The toilet 11 has a drain port 11a at the bottom as shown in FIG. In this embodiment, the toilet 11 includes a toilet body 11b composed of a bottomed container, and the drain port 11a is provided at the bottom of the toilet body 11b. The toilet body 11b may be housed in, for example, an outer frame 11c having feet, armrests, and a backrest. In addition, the negative pressure suction toilet 10 may include a water supply tank 21 and a water supply pump 22 for supplying water to the toilet body 11b.

  The negative pressure tank 12 is a container having a suction port 12a, and preferably has a pressure resistance enough to withstand a required negative pressure and a required corrosion resistance to accommodate drainage. The negative pressure tank 12 is connected to a vacuum pump 14. In this embodiment, the negative pressure tank 12 and the vacuum pump 14 are placed outdoors, and are placed inside a cover 16 as shown in FIG.

  As shown in FIG. 2, a drain port 11 a provided at the bottom of the toilet 11 and a suction port 12 a of the negative pressure tank 12 are connected by a drain pipe 13. In this embodiment, a valve 12b is provided at the suction port 12a of the negative pressure tank 12. Further, the negative pressure tank 12 is provided with an atmosphere release valve 12c for releasing the negative pressure tank 12 to the atmosphere. Further, a valve 12 d is provided at the bottom of the negative pressure tank 12. The negative pressure tank 12 is installed on a sewage facility 40 (for example, a sewage basin or a sewage pipe) buried underground. When the valve 12d is opened, the negative pressure tank 12 and the sewage equipment 40 are connected. A two-dot chain line GL in FIG. 2 indicates the ground. The two-dot chain line WL indicates the wall surface of the building. A two-dot chain line FL indicates a floor surface on which the toilet 11 is placed. A valve 14a is also provided between the vacuum pump 14 and the negative pressure tank 12. Although not shown, the vacuum pump 14 may include, for example, a pressure gauge, and form a predetermined negative pressure in the negative pressure tank 12 based on a measurement value of the pressure gauge.

  The drain pipe 13 is a pipe that is connected to the drain port 11a and the suction port 12a and that forms a flow path from the drain port 11a to the suction port 12a. The drainage pipe 13 has a rising portion 13a provided at one end of the drainage pipe 13 connected to the drainage port 11a and extending upward from the drainage port 11a to a predetermined height of the toilet bowl 11. are doing. In the negative pressure suction type toilet 10, water is poured into the toilet body 11b at the time of drainage. In this embodiment, water is poured from the water supply tank 21 to the toilet body 11b by operating the water supply pump 22. At this time, drainage is accumulated in the toilet body 11b to a predetermined height defined by the rising portion 13a. In this state, the vacuum pump 14 operates.

  When the vacuum pump 14 operates, the valve 12b provided at the suction port 12a of the negative pressure tank 12, the atmosphere release valve 12c, and the valve 12d provided at the bottom are each closed. The valve 14a provided in the vacuum pump 14 is opened when the vacuum pump 14 sucks air in the negative pressure tank 12 and generates a negative pressure. In this state, the air in the negative pressure tank 12 is sucked out by the vacuum pump 14 and the pressure is reduced to a predetermined pressure (for example, 0.08 MPa). The valve 14a is opened when the vacuum pump 14 sucks air in the negative pressure tank 12 and creates a negative pressure. Valve 14a is closed when negative pressure tank 12 is depressurized to a predetermined pressure and negative pressure tank 12 draws in drainage.

  When the valve 12 b provided at the suction port 12 a of the negative pressure tank 12, which has been reduced to a predetermined pressure, is opened, the drainage accumulated in the toilet body 11 b is drawn into the negative pressure tank 12 through the drainage line 13. At this time, when passing through the bent conduit forming the rising portion 13a, solid components such as stool and toilet paper contained in the drainage are pulverized. When the drainage is drawn into the negative pressure tank 12, the valve 14a provided in the vacuum pump 14 is closed to prevent the drainage from rebounding and entering the vacuum pump 14. In the negative pressure suction type toilet 10, when the valve 12d at the bottom of the negative pressure tank 12 is opened, the drainage accumulated in the negative pressure tank 12 flows out to the sewage equipment 40. When opening the valve 12d at the bottom of the negative pressure tank 12, the atmosphere release valve 12c of the negative pressure tank 12 is opened. As a result, the wastewater accumulated in the negative pressure tank 12 flows out to the sewage equipment 40 smoothly.

  The negative pressure suction toilet 10 includes a control device 30 that controls the operation of the water supply pump 22 to the toilet 11, the valves 12 b to 12 d of the negative pressure tank 12, the vacuum pump 14, and the like according to a predetermined program. Good to be. In this case, the toilet 11 is provided with an operation unit 31 that sends an operation signal for operating the water supply pump 22 to the toilet 11, the valves 12 b to 12 d of the negative pressure tank 12, and the operation of the vacuum pump 14 to the control device 30. Good to be.

  By the way, when temporarily installing the negative pressure suction toilet 10 in a house, the present inventor is studying disposing the toilet body 11b indoors and disposing the negative pressure tank 12 and the vacuum pump 14 outdoors. In this case, as shown in FIG. 2, the drainage pipe 13 is laid from the indoor to the negative pressure tank 12 outdoors through the wall surface WL. At this time, a through hole 60 for passing the drainage pipe 13 may be provided at a position higher than the floor surface FL due to a structural limitation of the wall surface WL. Further, for example, a through hole may be provided in the wall surface WL to allow a pipe of an air conditioner such as an air conditioner to pass therethrough. Use of such an existing through-hole as the through-hole 60 is also under study. The piping hole of the air conditioner may be provided in the room at a position as high as about 2.5 m from the floor surface FL.

  In the drainage pipe 13 of the negative pressure suction type toilet 10, a rising portion 13a is provided continuously from the drainage port 11a of the toilet body 11b. The drainage pipe 13 is laid down from the rising portion 13a and along the floor FL to the wall WL. When passing through the through-hole 60 provided at a height of about 2.5 m from the floor surface FL in the room, the drainage line 13 rises in the room along the wall surface WL (inner wall). Through the through hole 60. The drainage pipe 13 is lowered to the level of the ground GL along the wall surface WL (outer wall) outside the room. The drainage pipe 13 is laid along the ground GL, and is connected to the suction port 12 a of the negative pressure tank 12 disposed above the sewage system 40. The drain pipe 13 is also connected to the negative pressure tank 12 by being raised from the ground GL.

  As described above, in the flow direction of the drainage pipe 13, one or more (two in the embodiment of FIG. 2) ascending pipe portions 13b and 13c may be provided downstream of the rising portion 13a. That is, in the embodiment shown in FIG. 2, the rising pipe portion 13 b is provided in a portion that is raised up along the wall surface WL in the room. In addition, an ascending pipe portion 13c is provided at a portion which is started up from a place where the drainage pipe 13 is laid along the ground GL and connected to the negative pressure tank 12. In addition, in FIG. 1, the up pipe part 13c of the part connected to the negative pressure tank 12 is hidden by the cover 16, and the whole is not shown. As shown in FIG. 2, the up pipe portion 13 c connected to the negative pressure tank 12 rises so as to be connected from the ground GL to the suction port 12 a of the negative pressure tank 12 arranged in the cover 16. The rise pipe portion 13c may rise from about 0.5 m to about 2 m.

  In the negative pressure suction type toilet 10, the negative pressure in the negative pressure tank 12 acts on the drain pipe 13, so that the drainage accumulated in the toilet 11 is sucked into the negative pressure tank 12. When the drainage accumulated in the toilet 11 is sucked, energy is consumed in the upward pipe portions 13b and 13c to lift the drainage. The suction by the negative pressure tank 12 gradually weakens, and ends in the process of returning the negative pressure tank 12 to the atmospheric pressure. For this reason, when the suction ends, a part of the drainage may remain in the upward pipe portions 13b and 13c.

  After the suction is completed, the drainage pipe 13 becomes at atmospheric pressure, so that the drainage remaining in the upstream pipes 13b and 13c naturally flows down and drains upstream of the upstream pipes 13b and 13c. Flow into At this time, a part of the drainage pipe 13 may be filled with the drainage flowing into the upstream side of the up pipes 13b and 13c. In particular, as shown in FIG. 2, when the intake pipe 13 b rises to a position as high as about 2 m such as the upward pipe section 13 b along the indoor wall WL, a large amount of water flows into the upward pipe section 13 b when the suction is completed. Wastewater may remain. In addition, a portion of the upward pipe portion 13c connected to the negative pressure tank 12 is far from the toilet bowl 11, and is a portion through which drainage sucked into the negative pressure tank 12 passes last. The suction force of the negative pressure tank 12 gradually decreases after suction starts. In addition, in the upward pipe portion 13c, since the energy is required to pull up the drainage, the drainage sucked into the negative pressure tank 12 may remain.

  If a large amount of wastewater remains in the upgoing pipe portions 13b, 13c, a large amount of wastewater may flow into a pipe upstream of the upgoing pipe portions 13b, 13c. In this case, depending on the configuration of the pipeline on the upstream side of the upstream pipes 13b and 13c, a part of the pipeline on the upstream side of the upstream pipes 13b and 13c is filled with the drainage flowing from the upstream pipes 13b and 13c. . That is, on the side of the negative pressure tank 12 with respect to the rising portion 13a, a part of the drainage pipe 13 is filled with the drainage.

  On the downstream side of the rising portion 13a, when a part of the drainage pipe 13 is filled with the drainage, the negative pressure from the negative pressure tank 12 is discharged to the drainage accumulated in the toilet 11 when sucking the drainage. It is difficult to work. That is, when a part of the drainage pipe 13 is filled with the drainage when the drainage is sucked into the toilet 11, first, a negative pressure acts on the drainage filling the part of the drainage pipe 13, and this Aspirate. Thereafter, a negative pressure acts on the drainage accumulated in the toilet 11. At this time, the negative pressure in the negative pressure tank 12 is weakened. For this reason, a sufficient suction force does not act on the wastewater accumulated in the toilet 11, and the wastewater may remain in the toilet 11. In this case, it is necessary to supply water again to the toilet 11, operate the vacuum pump 14 to generate a negative pressure in the negative pressure tank 12, and repeat a series of steps for sucking the drainage remaining in the toilet 11. The present inventor has found that such a problem occurs in the negative pressure suction type toilet 10 in a case where there are the rising pipe portions 13b and 13c rising to a certain height on the downstream side from the rising portion 13a.

  In the negative pressure suction type toilet 10, the present inventor has a receiving portion 13b1, which has a larger volume than the ascending tube portions 13b, 13c, immediately upstream of the ascending tube portions 13b, 13c downstream of the rising portion 13a. It is proposed to provide 13c1. That is, in the negative pressure suction toilet 10 proposed here, as shown in FIG. 2, the receiving portions 13b1 and 13c1 are provided in the drainage pipe 13 immediately upstream of the upward pipe portions 13b and 13c. The receiving portions 13b1 and 13c1 have a larger volume than the upstream pipe portions 13b and 13c. According to such a configuration, when the drainage remains at the time of suction in the upstream pipe portions 13b and 13c when the suction is completed, the drainage remaining in the upstream pipe portions 13b and 13c after the suction is completed. It flows down naturally and flows into the upstream side of the upward pipe portions 13b and 13c. In this case, receiving portions 13b1 and 13c1 are provided immediately upstream of the upstream pipe portions 13b and 13c, and the receiving portions 13b1 and 13c1 have a larger volume than the upstream pipe portions 13b and 13c.

  For this reason, even if the drainage remaining in the upstream pipe portions 13b and 13c flows into the receiving portions 13b1 and 13c1, the receiving portions 13b1 and 13c1 are not filled with the drainage. In this case, since the drainage does not accumulate up to the upper portions of the receiving portions 13b1 and 13c1, a gap is generated in the upper portions of the receiving portions 13b1 and 13c1. The negative pressure from the negative pressure tank 12 can pass through the voids generated in the receiving portions 13b1 and 13c1, and act on the drainage collected from the toilet 11 in the rising portion 13a. Therefore, the drainage of the toilet 11 is more smoothly sucked. And it is difficult for the drainage to remain in the toilet 11 after suction. In particular, a required flow velocity is secured in the rising portion 13a through which the drainage passes at the beginning of suction. For this reason, even when there are the upstream pipe portions 13b and 13c, the function of appropriately crushing solids such as stool and toilet paper is maintained in the rising portion 13a, so that the stool and toilet paper are hardly clogged.

  Various forms can be adopted for the receiving portions 13b1 and 13c1.

  For example, in the drainage pipe 13 between the upstream pipe sections 13b and 13c and the receiving sections 13b1 and 13c1, the change in the cross-sectional area orthogonal to the pipe axis is preferably 100% or less. In other words, in the main pipeline from the toilet 11 to the negative pressure tank 12, the change of the cross-sectional area between the upward pipes 13b and 13c and the receiving portions 13b1 and 13c1 is 100% or less (double or less), for example, 80% or less. (1.8 times or less), and more preferably 60% (1.6 times or less) or less. Here, the “drain pipe in the receiving section” does not include a pipe parallel to the drain pipe in the receiving section, an intermediate tank, and the like, as described later. Further, the “pipe axis” is a line connecting the center of the inner surface of the pipe in the cross section of the pipe orthogonal to the flow direction in the flow direction. For example, in a circular pipe having a circular cross section orthogonal to the flow direction of the pipe, the pipe axis is a line connecting the centers of the pipe cross sections. Also in a pipe having a modified cross section, a line connecting the center of the inner surface of the pipe in the cross section orthogonal to the flow direction of the pipe in the flow direction is referred to as “pipe axis”. When the change in the cross-sectional area between the upgoing pipe portions 13b and 13c and the receiving portions 13b1 and 13c1 is 100% or less, the suction by the action of the negative pressure can be performed smoothly.

  Further, it is desirable that the cross-sectional area of the drainage pipe in the receiving portions 13b1 and 13c1 is wider than the cross-sectional area of the drainage pipe in the upgoing pipe portions 13b and 13c. For example, a PVC pipe having a circular cross section with an inner diameter of 20 mm may be used as a drain pipe in the upward pipe sections 13b and 13c, and a PVC pipe having a circular cross section with an inner diameter of 25 mm may be used as a drain pipe in the receiving sections 13b1 and 13c1. In this case, the cross-sectional areas of the receiving portions 13b1 and 13c1 are about 56% larger than those of the upgoing pipe portions 13b and 13c. In this case, even if the receiving portions 13b1 and 13c1 are shorter than the upstream pipe portions 13b and 13c, a large volume is secured. In this case, the distance from the toilet 11 to the rising of the rising pipe 13b can be shortened as compared with the case where a PVC pipe having the same inner diameter as the rising pipe 13b is used for the receiving part 13b1.

  Further, the receiving portions 13b1 and 13c1 may be arranged so that the tube axis is horizontal. If the tube axes of the receiving portions 13b1 and 13c1 are horizontal, it is difficult for the receiving portions 13b1 and 13c1 to be filled with the drainage even if the drainage flows from the upward pipes 13b and 13c. Further, the drainage pipes in the receiving portions 13b1 and 13c1 may be circular pipes having a circular cross section orthogonal to the pipe axis. The circular tube has a uniform cross section, so it can be installed without worrying about the top and bottom of the cross section. Therefore, the workability is good.

  In addition, the receiving portions 13b1 and 13c1 may be deformed pipes in which, in a cross section orthogonal to the pipe axis, the area below the center in the height direction on the inner surface of the pipe is larger than above. In such a deformed pipeline, the area below the center in the height direction on the inner surface of the pipeline is larger than the area above. For this reason, even if drainage flows into the receiving portions 13b1 and 13c1 from the upstream pipe portions 13b and 13c, a gap is likely to be formed above the receiving portions 13b1 and 13c1.

  When the cross-sectional shape orthogonal to the pipe axis is the same between the receiving portions 13b1 and 13c1 and the upgoing pipe portions 13b and 13c, the receiving portions 13b1 and 13c1 may be longer than the upgoing pipe portions 13b and 13c. That is, when the length of the receiving portion 13b1 is A and the length of the upstream pipe portion 13b is a, A> a may be satisfied. When the length of the receiving portion 13c1 is B and the length of the upstream pipe portion 13c is b, it is preferable that B> b. Thereby, the configuration with the receiving portions 13b1 and 13c1 having a larger volume than the upstream pipe portions 13b and 13c may be realized.

  FIG. 3 is a plan view schematically showing the receiving portion 13b1 provided with the bypass conduit 18. The arrow A1 along the drain pipe 13 is on the negative pressure tank 12 side of the drain pipe 13 and is a direction in which the up pipe 13b is provided with respect to the receiving part 13b1. The arrow B1 is on the toilet 11 side, and corresponds to the upstream side in the direction in which drainage flows. Arrows A1 and B1 are the same in FIG.

  In the embodiment shown in FIG. 3, the receiving portion 13b1 is disposed in parallel on the side of the drainage line 13 in the receiving portion 13b1, and connects the bypass line 18 horizontally connected to the drainage line 13 in the receiving portion 13b1. Have. In this case, the drainage collected in the toilet 11 is mainly sucked along the drainage line 13 in the receiving portion 13b1. For this reason, the drainage accumulated in the toilet 11 is smoothly sucked. After the suction is completed, the drainage remaining in the up pipe 13b flows into the drain pipe 13 and the bypass pipe 18 in the receiving portion 13b1. Since the drainage remaining in the up pipe 13b flows into the bypass pipe 18, the drain pipe 13 in the receiving section 13b1 can be configured to be shorter. The bypass pipe 18 arranged in parallel with the drain pipe 13 is connected to the drain pipe 13 in the horizontal direction. For this reason, the drainage that has entered the bypass pipe 18 does not stay in the bypass pipe 18 but returns to the drain pipe 13 in the receiving portion 13b1 at an appropriate timing. Then, at the time of the next suction, etc., it is sucked into the negative pressure tank 12.

  FIG. 4 is a plan view schematically showing the receiving portion 13b1 including the intermediate tank 19. As shown in FIG. 4, the receiving portion 13b1 has an intermediate tank 19 that is disposed on a side of the drainage line 13 in the receiving portion 13b1 and is connected to the drainage line 13 in the receiving portion 13b1 in a horizontal direction. It may be. In this case, the drainage collected in the toilet 11 is mainly sucked along the drainage line 13 in the receiving portion 13b1. For this reason, the drainage accumulated in the toilet 11 is smoothly sucked. After the suction is completed, the drainage remaining in the up pipe 13b flows down and flows into the drain pipe 13 and the intermediate tank 19 in the receiving section 13b1. Since the drainage remaining in the up pipe 13b flows into the intermediate tank 19, the drain pipe 13 in the receiving portion 13b1 can be configured to be short. Further, the drainage that has entered the intermediate tank 19 does not stay in the intermediate tank 19 but returns to the drainage line 13 in the receiving portion 13b1 at an appropriate timing. Then, at the time of the next suction, etc., it is sucked into the negative pressure tank 12.

  In addition, the drainage remaining in the up pipe 13b may flow into the bypass pipe 18 and the intermediate tank 19 as a part of the receiving portion 13b1 after the suction is completed. By providing such a bypass conduit 18 and an intermediate tank 19 in the receiving portion 13b1, the drain conduit 13 in the receiving portion 13b1 can be shortened. From this viewpoint, the bypass pipe 18 and the intermediate tank 19 do not necessarily have to be arranged on the side of the drain pipe 13 in the receiving portion 13b1. However, from the viewpoint that the wastewater that has entered the bypass pipe 18 and the intermediate tank 19 returns to the drain pipe 13 at an appropriate timing, the bypass pipe 18 and the intermediate tank 19 are connected to the drain pipe 13 in the receiving portion 13b1. It is better to be arranged on the side and to be connected horizontally to the drainage line 13. Note that the bypass pipe 18 and the intermediate tank 19 are not limited to the above-described embodiments as long as the above-described functions and effects are not hindered.

  As shown in FIGS. 1 and 2, when the drainage pipe 13 includes a plurality of upgoing pipes 13b and 13c, receiving sections 13b1 and 13c1 are provided for each of the upgoing pipes 13b and 13c. Good to be. Each of the receiving portions 13b1 and 13c1 may have a larger volume than the upstream pipe portions 13b and 13c according to the volumes of the upstream pipe portions 13b and 13c provided on the respective downstream sides.

  As described above, the negative pressure suction type toilet according to one embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment and modifications unless otherwise specified, and further includes various modifications.

  For example, as shown in FIG. 3 or FIG. 4, a parallel bypass pipe 18 and an intermediate tank 19 may be provided in the drain pipe 13 in the receiving portions 13b1 and 13c1. In such a case, a valve (not shown) may be provided in a pipe connecting the drain pipe 13 and the bypass pipe 18 or a pipe connecting the drain pipe 13 and the intermediate tank 19. For example, when the drainage collected in the toilet 11 is sucked into the negative pressure tank 12, the drainage is not affected by the bypass pipe 18 and the intermediate tank 19 and is drained to the drain pipe 13 by closing the valve. Flows smoothly along. Then, when the valve is opened after the end of the suction, the drainage flowing down from the up pipes 13b, 13c to the receiving portions 13b1, 13c1 flows into the bypass pipe 18 and the intermediate tank 19 parallel to the drain pipe 13. As described above, the valves provided in the bypass pipe 18 and the intermediate tank 19 may be opened or closed at an appropriate timing in a series of steps in which the drainage is sucked into the negative pressure tank 12. Therefore, the valves provided in the bypass pipe 18 and the intermediate tank 19 may be controlled by the control device 30.

  INDUSTRIAL APPLICATION This invention is industrially applicable as a negative pressure suction type toilet.

DESCRIPTION OF SYMBOLS 10 Negative pressure suction type toilet 11 Toilet bowl 11a Drainage port 11b Toilet bowl main body 11c Outer frame 12 Negative pressure tank 12a Suction port 12b Valve 12c Atmospheric release valve 12d Valve 13 Drainage pipe 13a Rising sections 13b, 13c Up pipe sections 13b1, 13c1 Receiving section 14 Vacuum pump 14a Valve 16 Cover 18 Bypass line 19 Intermediate tank 20 Bed 21 Water supply tank 22 Water supply pump 30 Controller 31 Operation unit 40 Sewage equipment 60 Through hole FL Floor GL Ground WL Wall

Claims (9)

A toilet bowl having a drain at the bottom,
A negative pressure tank having a suction port,
A drain pipe connected to the drain port and the suction port and extending from the drain port to the suction port;
A vacuum pump connected to the negative pressure tank,
The drainage line,
A rising portion provided at one end of the drainage pipe connected to the drainage port, and extending upward from the drainage port to a predetermined height of the toilet;
In the flow direction of the drainage from the toilet to the negative pressure tank, an upward pipe portion provided downstream from the rising portion,
A receiving portion, which is disposed immediately upstream of the upstream pipe portion, is configured of a pipeline in which a pipe axis is horizontally disposed, and has a volume larger than a volume of a drainage pipeline in the upstream pipe portion ,
Negative pressure toilet.   The negative pressure suction toilet according to claim 1, wherein a cross-sectional area of the receiving section orthogonal to a pipe axis of the drainage pipe is wider than a cross-sectional area of the upgoing pipe section orthogonal to a pipe axis of the drainage pipe. The negative pressure suction toilet according to claim 1 , wherein the drainage pipe in the receiving part is a circular pipe having a circular cross section orthogonal to a pipe axis. 2. The negative pressure suction according to claim 1 , wherein, in a cross section orthogonal to the pipe axis, the receiving section is a deformed pipe whose area below the center in the height direction on the inner surface of the pipe is wider than above. 3. Toilet. The receiving unit is disposed on the side of the drainage pipe in the receiving portion, an intermediate tank connected to a horizontal direction with respect to the drain line at the receiving unit, one of the claims 1 to 4 The negative pressure suction toilet described in one item. A toilet bowl having a drain at the bottom,
A negative pressure tank having a suction port,
A drain pipe connected to the drain port and the suction port and extending from the drain port to the suction port;
A vacuum pump connected to the negative pressure tank,
The drainage line,
A rising portion provided at one end of the drainage pipe connected to the drainage port, and extending upward from the drainage port to a predetermined height of the toilet;
In the flow direction of the drainage from the toilet to the negative pressure tank, an up pipe portion provided downstream from the rising portion,
Wherein disposed immediately upstream of the upstream pipe portion, possess a receiving portion having a greater volume than the uplink tube portion,
The receiving portion is a pipeline in which a pipe axis is horizontally arranged, and the cross-sectional shape orthogonal to the pipe axis is the same between the receiving portion and the upgoing pipe portion. A long, negative pressure suction toilet. A toilet bowl having a drain at the bottom,
A negative pressure tank having a suction port,
A drain pipe connected to the drain port and the suction port and extending from the drain port to the suction port;
A vacuum pump connected to the negative pressure tank,
The drainage line,
A rising portion provided at one end of the drainage pipe connected to the drainage port, and extending upward from the drainage port to a predetermined height of the toilet;
In the flow direction of the drainage from the toilet to the negative pressure tank, an upward pipe portion provided downstream from the rising portion,
Wherein disposed immediately upstream of the upstream pipe portion, possess a receiving portion having a greater volume than the uplink tube portion,
The receiving portion is a pipeline in which a pipe axis is horizontally arranged, is arranged in parallel on a side of the drainage channel in the receiving portion, and is horizontally connected to the drainage channel in the receiving portion. A negative pressure suction toilet with a bypass line . A toilet bowl having a drain at the bottom,
A negative pressure tank having a suction port,
A drain pipe connected to the drain port and the suction port and extending from the drain port to the suction port;
A vacuum pump connected to the negative pressure tank,
The drainage line,
A rising portion provided at one end of the drainage pipe connected to the drainage port, and extending upward from the drainage port to a predetermined height of the toilet;
In the flow direction of the drainage from the toilet to the negative pressure tank, an upward pipe portion provided downstream from the rising portion,
Wherein disposed immediately upstream of the upstream pipe portion, possess a receiving portion having a greater volume than the uplink tube portion,
A negative pressure suction toilet , wherein a cross-sectional area of the receiving section perpendicular to the pipe axis of the drainage pipe is wider than a cross-sectional area of the upgoing pipe section perpendicular to the pipe axis of the drainage pipe .   The negative pressure suction type according to any one of claims 1 to 8, wherein the drainage pipe includes a plurality of the upward pipe sections, and the receiving section is provided for each of the upward pipe sections. toilet.

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