JP2016168152A - Suction tank and negative pressure type toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the scatter of waste water inside a tank.SOLUTION: In a suction tank 100, a bulging part 121 which continues in a circumferential direction and bulges to an inner diameter side from an inner peripheral surface of a tank body 120 is provided in an intermediate part in a height direction of the tank body 120. A suction outlet 122 is provided above the bulging part 121. A suction device 140 is connected to the suction outlet 122 in the outside of the tank body 120. A suction inlet 123 is provided below the bulging part 121. The suction inlet 123 penetrates through the tank body 120 along the inner peripheral surface of the tank body 120.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a suction tank and a negative pressure suction toilet.

  For example, Japanese Patent Laid-Open No. 10-195960 proposes a suction device. The suction device proposed in the publication includes a suction tank and a suction mechanism. The suction mechanism sucks the gas in the suction tank and places the suction tank in a negative pressure state. The suction tank includes a suction port and a discharge port. A suction inlet is a site | part which sucks a to-be-sucked object in the suction tank in a negative pressure state. The discharge port is a part that is provided below the suction tank and discharges the suction object stored in the suction tank to the outside of the suction tank. An opening / closing valve is provided at the discharge port. The on-off valve has a discharge port closed when the suction tank is in a negative pressure state. The on-off valve is opened to discharge the suction object after the suction tank is released from the negative pressure state and the suction target is stored in the suction tank.

JP-A-10-195960

  Here, the suction tank is used, for example, for the purpose of sucking dirty water. At this time, the sucked sewage vigorously flows into the tank, and the sewage scatters in any direction in the tank. For this reason, sewage is stuck everywhere in the tank, which may cause a bad odor in the tank or make it difficult to clean the tank.

  The suction tank proposed here includes a tank main body having a cylindrical inner peripheral surface and a suction device for sucking out gas in the tank main body to the outside. The tank main body is provided at the intermediate portion in the height direction of the tank main body, and is provided on the upper side of the overhanging portion and the overhanging portion that projects continuously from the inner peripheral surface of the tank main body to the inner diameter side. A suction port to which a suction device is connected outside, and a suction port which is provided below the overhanging portion and penetrates the tank body along the inner peripheral surface of the tank. According to such a configuration, the liquid sucked from the suction port flows so as to swirl in the tank body below the overhanging portion. For this reason, the flow of the sucked liquid can be controlled by the projecting portion, and the liquid can be suppressed from being scattered in an arbitrary direction within the tank body.

  Here, the lower surface of the overhang portion may extend downward as it goes inward of the tank body. The cross-sectional shape of the inner peripheral surface of the tank body may be circular, for example. In this case, the height K at which the projecting portion projects from the inner peripheral surface of the tank body toward the inner diameter side of the tank body is 0.05R ≦ T ≦ 0 with respect to the inner diameter R of the tank body from the inner peripheral surface of the tank body. .9R relationship may be provided. The overhanging portion is perpendicular to the tangent to the inner peripheral surface of the tank main body, and the height K protruding from the inner peripheral surface of the tank main body to the inside of the tank main body is preferably 2 cm or more. The overhanging height K can also be referred to as overhang amount or overhang length.

  Moreover, the overhang | projection part may be provided separately from the tank main body. In this case, the overhang portion may be an annular member that is attached to an intermediate portion between the suction port and the suction port of the tank body. Moreover, the overhang | projection part may have the sealing material which seals the clearance gap with the internal peripheral surface of a tank main body.

  Moreover, the partition which partitions off the upper side and lower side of an overhang | projection part may be attached to the internal diameter side of an overhang | projection part. The partition to be attached can be ventilated between the upper side and the lower side of the overhanging part and should block the liquid.

  Further, a waste outlet may be provided at the bottom of the tank body. In this case, it is preferable that the bottom surface of the tank body is gradually lowered toward the disposal port at least around the disposal port.

  In addition, the suction device may be an intake device that uses the back pressure of a blower operated by an electric motor, for example. The suction device may be a vacuum pump.

  Moreover, the negative pressure suction-type toilet is good to be provided with the suction tank mentioned above, the toilet bowl main body, and the piping which connects a toilet bowl main body and a tank main body. The toilet body may have a discharge port at the bottom. The pipe may connect the outlet of the toilet body and the suction port of the tank body, and an opening / closing valve may be provided in at least one of the outlet, the suction port, and the pipe. In this case, a control device that operates the suction device and the on-off valve is provided, and the control device starts the suction of the suction device with the on-off valve closed, for example, and determines in advance from the timing at which the suction of the suction device is started. The on-off valve may be opened after a predetermined time has elapsed.

FIG. 1 is a schematic view of a suction tank 100 and a negative pressure suction toilet 1000. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is an enlarged view of an enlarged portion of the intermediate portion of the tank body 120 where the annular member 200 constituting the overhang portion 121 is attached. FIG. 4 is a partial cross-sectional view of the tank main body 120, showing the IV-IV cross section of FIG. FIG. 5 is a modification in which the arrangement of the suction ports 123 with respect to the inner peripheral surface of the tank body 120 is changed. FIG. 6 is a modification in which the arrangement of the suction ports 123 with respect to the inner peripheral surface of the tank main body 120 is changed. FIG. 7 is a modification in which the arrangement of the suction ports 123 with respect to the inner peripheral surface of the tank body 120 is changed. FIG. 8 is a modification in which the arrangement of the suction ports 123 with respect to the inner peripheral surface of the tank body 120 is changed. FIG. 9 is a schematic view showing another form of the suction tank 100 and the negative pressure suction toilet 1000 proposed here.

  Hereinafter, a suction tank and a negative pressure suction toilet according to an embodiment of the present invention will be described with reference to the drawings. In addition, although embodiment and Example described here illustrate the suitable one form of this invention, this invention is not limited unless there is particular mention.

<< Suction tank 100, negative pressure suction toilet 1000 >>
FIG. 1 is a schematic view of a suction tank 100 and a negative pressure suction toilet 1000 proposed here. The suction tank 100 includes a cylindrical tank body 120 and a suction device 140. The negative pressure suction toilet 1000 includes such a suction tank 100. In FIG. 1, the suction tank 100 is connected to the toilet body 500 by a pipe 600. The negative pressure suction toilet 1000 is controlled by the control device 700. Hereinafter, the structure of each member is demonstrated in order.

<Tank body 120>
The tank body 120 is a bottomed container having a cylindrical inner peripheral surface. In this embodiment, it has a substantially cylindrical shape in which the cross-sectional shape of the inner peripheral surface is circular in a cross section. By making the inner peripheral surface of the tank main body 120 circular, distortion of the tank side surface tends to be uniform, and it becomes easy to ensure required pressure resistance. In this embodiment, the tank body 120 is formed of resin. The cylindrical tank body 120 is arranged with the central axis D oriented vertically. The tank body 120 only needs to have a cylindrical inner peripheral surface. The cross-sectional shape of the inner peripheral surface of the tank main body 120 is not limited to a circular shape, but is an elliptical shape or a regular polygonal shape having corners formed into arcs (for example, octagonal, hexagonal, pentagonal, quadrilateral, triangular, etc.) But you can. Furthermore, the cross-sectional shape of the inner peripheral surface of the tank body 120 is not particularly limited to a regular polygonal shape.

  Further, the tank body 120 may be made of metal, but in this embodiment, a resin is adopted in that the weight can be reduced, the corrosion resistance is ensured, and the shape can be easily formed into an arbitrary shape. ing. As the resin used for the tank body 120, thermoplastic resins such as polyvinyl chloride, polycarbonate, polyamide, polypropylene, and polyester, thermosetting resins such as phenol resin and epoxy resin, various engineering plastics, and the like can be used. Those reinforced with fibers can also be used. Among these, polyvinyl chloride is preferable in that it can be molded by injection molding and has excellent chemical resistance and mechanical strength. In this embodiment, polyvinyl chloride is employed.

  The tank body 120 includes an overhang portion 121, a suction port 122, a suction port 123, a disposal port 124, and a lid 125. The overhanging portion 121 is provided at an intermediate portion in the height direction of the tank main body 120. The suction port 122 is provided above the overhanging portion 121. The suction port 123 is provided below the overhang portion 121. The disposal port 124 is provided at the bottom of the tank body 120. The lid 125 is provided on the upper part of the tank body 120.

<< overhang part 121 >>
The overhanging part 121 projects continuously from the inner peripheral surface of the tank body 120 to the inner diameter side in the circumferential direction. For example, in this embodiment, the cross-sectional shape of the inner peripheral surface of the tank body 120 is a circle. The height K of the overhanging portion 121 is set to about 0.5 R with respect to the inner diameter R (radius) of the tank main body 120 from the inner peripheral surface of the tank main body 120. Here, the inner diameter R of the tank main body 120 is an inner diameter on the lower side of the overhanging portion 121, and it is preferable to evaluate mainly the inner diameter of the portion where the liquid flowing into the tank main body 120 from the suction port 123 turns. The height K of the overhang portion 121 will be further described later. The center of the overhang portion 121 is open, and the upper region S1 and the lower region S2 of the tank main body 120 sandwiching the overhang portion 121 are connected through the opening 121a so as to allow ventilation.

<< annular member 200 >>
In this embodiment, the overhang portion 121 is provided separately from the tank body 120. That is, the overhang portion 121 is an annular member 200 that is attached to an intermediate portion of the tank body 120. The annular member 200 includes a base portion 210 and a flange portion 220. FIG. 3 is an enlarged view of an enlarged portion of the intermediate portion of the tank body 120 where the annular member 200 constituting the overhang portion 121 is attached. In this embodiment, a support portion 120 a that supports the annular member 200 that constitutes the overhang portion 121 is provided at an intermediate portion of the tank body 120. The support part 120 a is a step projecting inward from the inner peripheral surface of the tank body 120. The inner diameter of the tank body 120 is slightly smaller on the lower side than the step as the support portion 120a.

  As shown in FIGS. 1 and 3, the base portion 210 is an annular portion that is attached to the inner peripheral surface of the tank body 120. The flange portion 220 projects continuously from the base portion 210 toward the inner diameter side in the circumferential direction. At the upper part of the base 210, a flange 210 a placed on the step as the support part 120 a of the tank body 120 projects outward. That is, the diameter of the flange 210a is larger than the inner diameter (diameter) of the tank body 120 below the step 120a and smaller than the inner diameter (diameter) of the tank body 120 above the step 120a. The inner diameter of the lower part of the base 210 is slightly smaller than the inner diameter (diameter) of the tank body 120 below the step 120a. As a result, the annular member 200 constituting the overhanging portion 121 is accommodated in the tank main body 120 from the upper opening of the tank main body 120, and is placed on the step 120a. The lower part of the base 210 is opposed to the inner peripheral surface of the tank body 120 below the step 120a.

<< Sealant 231 >>
A sealing material 231 that seals a gap with the inner peripheral surface of the tank main body 120 is attached to the outer peripheral portion of the overhang portion 121. In this embodiment, the lower part of the base part 210 of the annular member 200 constituting the overhang part 121 is opposed to the inner peripheral surface of the tank main body 120 on the lower side of the step 120a. The sealing material 231 is attached to the outer peripheral side surface of the base portion 210.

  As shown in FIG. 3, a groove 232 continuous in the circumferential direction is provided on the outer peripheral side surface of the base 210. The sealing material 231 is attached to the groove 232. In this embodiment, the sealing material 231 is a rubber member and includes a base portion 231a and a protruding portion 231b. The base portion 231 a is a portion that is attached to the groove 232. The protruding portion 231b is a portion that extends in the outer diameter direction continuously from the base portion 231a in the circumferential direction. As shown in FIG. 3, when the annular member 200 constituting the projecting portion 121 is attached to the tank main body 120, the protruding portion 231 b of the sealing material 231 is deformed along the inner wall of the tank main body 120 and is in close contact. The sealing material 231 fills a gap between the lower portion of the base portion 210 of the annular member 200 and the inner peripheral surface of the tank body 120 below the step 120a.

  In this embodiment, the lower surface of the overhang portion 121 extends downward as it goes inward of the tank body 120. Similarly, the upper surface of the overhanging portion 121 extends downward as it goes inward of the tank body 120. That is, the flange portion 220 of the annular member 200 constituting the overhang portion 121 extends from the outside toward the center. Further, a knob portion 220 a protruding upward is provided on the inner diameter side of the upper surface of the collar portion 220. The knob part 220a is a part that is left when the annular member 200 constituting the projecting part 121 is attached or detached. In this embodiment, an opening 121 a is provided at the center of the annular member 200. When removing the annular member 200, the annular member 200 can be pulled up from the tank main body 120 by putting a hand in the opening 121a.

  In this embodiment, the overhang portion 121 is constituted by an integral annular member 200 that is continuous in the circumferential direction. For example, when the annular member 200 is used for a large tank, a plurality of arc-shaped (in other words, fan-shaped) members may be combined. In this embodiment, the overhang portion 121 is provided separately from the tank main body 120, but may be provided integrally with the tank main body 120 on the inner peripheral surface of the tank main body 120.

<Suction port 122>
The suction port 122 of the tank body 120 is provided above the overhanging portion 121, and the suction device 140 is connected to the outside of the tank body 120 by a pipe 142. The suction device 140 is a device that sucks out the gas in the tank body 120 to the outside. Examples of the suction device 140 include an intake device and a vacuum pump. The suction device 140 is connected to the control device 700 and is electrically controlled. In this embodiment, an on-off valve 144 is attached to the pipe 142. The on-off valve 144 is opened when, for example, the suction device 140 is operated to suck gas from the tank body 120 to the outside, but is closed when the suction device 140 is stopped. In this embodiment, the on-off valve 144 is provided in the pipe 142, but may be provided in the suction port 122 or the suction device 140. In addition to the illustrated objects, a check valve, an on-off valve, an air release valve, and the like may be appropriately attached to the pipe 142 and the tank body 120.

  In this embodiment, as shown in FIG. 1, the pipe 142 includes a mist separator 143 (also referred to as a mist trap) that separates liquid. Further, the drain pipe 143 a of the mist separator 143 is connected to the tank body 120. Accordingly, even when sewage enters the pipe 142 from the suction port 122, the mist separator 143 separates the sewage. In this embodiment, an air release valve 150 is provided in the pipe 142 to which the mist separator 143 is attached. The drain pipe 143a is provided with an on-off valve 151. In this case, when operating the suction device 140 to suck out the gas from the tank body 120 to the outside, it is preferable that the on-off valve 144 is opened and the air release valve 150 and the on-off valve 151 are closed. Thereby, the air in the tank can be sucked by the suction device 140 through the pipe 142. At this time, moisture contained in the sucked air is separated by the mist separator 143. Then, after the suction device 140 is stopped, when the opening / closing valve 144 is closed and the atmosphere release valve 150 is opened, the inside of the tank is opened to the atmosphere. The on-off valve 151 is opened when the atmosphere is released. As a result, the water separated by the mist separator 143 returns to the tank body 120 from the return port 143b through the drain pipe 143a. In this embodiment, the pipe 142 is provided with the mist separator 143, but the pipe 142 is not necessarily provided with the mist separator 143 as in other embodiments described later shown in FIG. Also good.

<Suction port 123>
The suction port 123 is provided below the overhanging portion 121 of the tank body 120. The suction port 123 passes through the tank body 120 along the inner peripheral surface of the tank body 120. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 and is a cross-sectional view of the suction tank 100 crossing the tank body 120 at the height position where the suction port 123 is provided. In this embodiment, as shown in FIG. 2, the suction port 123 passes through the tank body 120 along the direction of the tangent T of the inner peripheral surface of the tank body 120. That is, in this embodiment, the suction port 123 is provided in the tank body 120 so that the liquid flows into the tank body 120 along the tangent line T of the inner peripheral surface of the tank body 120.

  One end of a pipe 600 is attached to the suction port 123. The other end of the pipe 600 is connected to the toilet body 500. In this embodiment, a discharge port 510 is provided at the bottom of the toilet body 500. The other end of the pipe 600 is connected to the outlet 510 at the bottom of the toilet body 500. The pipe 600 may be provided with an on-off valve 610 at least at one place. The on-off valve 610 is composed of, for example, an electromagnetic valve, is connected to the control device 700, and is opened and closed by electrical control.

<< Disposal port 124 >>
As shown in FIGS. 1 and 2, the waste outlet 124 is provided at the bottom of the tank body 120. The bottom surface 120 b of the tank main body 120 is gradually lowered toward the disposal port 124 at least around the disposal port 124. With this configuration, the liquid sucked into the tank main body 120 gathers toward the disposal port 124 and is smoothly discharged from the disposal port 124 when the disposal port 124 is opened.

《Cover 125》
The lid 125 is attached to the upper part of the tank body 120. The lid 125 includes a lid part 125 a that covers the upper part of the tank body 120 and an insertion part 125 b that is inserted into the tank body 120. The insertion portion 125b is provided with a groove 125b1 on the outer peripheral surface, and a sealing material 125b2 is attached thereto. The gap between the lid 125 and the tank body 120 is filled with the sealing material 125b2, and the airtightness of the tank body 120 is maintained.

  Here, as shown in FIG. 1, a case where sewage is connected to the toilet body 500 and sucks sewage from the toilet body 500 will be described. As described above, in the suction tank 100, as shown in FIG. 1, the suction device 140 is attached to the suction port 122 through the pipe 142, and the toilet body 500 is connected to the suction port 123 through the pipe 600. Has been. An annular member 200 as the overhanging part 121 and a lid 125 are attached to the tank body 120.

<< Control Device 700 >>
The control device 700 first operates the suction device 140 with the on-off valve 610 on the toilet body 500 side closed. Since the suction device 140 sucks out the air in the tank body 120, the tank body 120 has a negative pressure (a pressure lower than the atmospheric pressure). In order to increase the suction force in the initial movement by the suction tank 100, the control device 700 operates the suction device 140 to open the on-off valve 610 in a state where the pressure inside the tank main body 120 is somewhat negative.

  When the on-off valve 610 is opened, dirty water collected in the toilet body 500 is drawn into the tank body 120 through the pipe 600. The tank main body 120 is provided with an overhang portion 121 that continuously protrudes from the inner peripheral surface of the tank main body 120 in the circumferential direction toward the inner diameter side in the intermediate portion in the height direction of the tank main body 120. The suction port 123 is provided below the overhanging portion 121 and penetrates the tank body 120 along the inner peripheral surface of the tank body 120. As described above, in this suction tank 100, the suction device 140 is operated by the control device 700, the inside of the tank main body 120 is brought to a certain negative pressure, the on-off valve 610 is opened, and sewage is supplied to the tank main body 120 from the suction port 123. Pull in. At this time, since the tank body 120 has a negative pressure, the sewage is sucked in through the suction port 123.

  The suction port 123 of the suction tank 100 is provided below the overhanging portion 121 and penetrates the tank body 120 along the inner peripheral surface of the tank body 120. For this reason, the sewage flowing from the suction port 123 turns in the tank body 120 along the inner peripheral surface of the cylindrical tank body 120. In this embodiment, the inner peripheral surface of the tank body 120 has a cylindrical shape. For this reason, the sewage flowing into the tank body 120 smoothly turns along the inner peripheral surface of the tank body 120.

  Furthermore, an overhang portion 121 is provided at an intermediate portion in the height direction of the tank body 120. The overhanging portion 121 prevents the sewage flowing into the tank main body 120 from scattering to the upper side of the tank main body 120 (above the overhanging portion 121). Moreover, in this embodiment, the collar part 220 of the annular member 200 that constitutes the overhanging part 121 extends from the outside toward the center side. That is, the lower surface of the overhanging portion 121 extends downward as it goes inward of the tank main body 120, and the swirling flow of the sewage is directed downward along the overhanging portion 121 (the flange portion 220). For this reason, sewage is led to the bottom of the tank body 120 for air supply. Further, the upper surface of the overhanging portion 121 also extends downward as it goes inward of the tank main body 120. For this reason, even if sewage enters the upper side of the overhanging portion 121, it flows down toward the bottom of the tank main body 120 along the side surface of the tank main body 120 and the upper surface of the overhanging portion 121.

  As described above, in the suction tank 100, the overhanging portion 121 projects from the inner peripheral surface of the tank main body 120 to the inner diameter side continuously in the circumferential direction at the intermediate portion in the height direction of the tank main body 120. The suction port 122 is provided above the overhang portion 121. A suction device 140 is connected to the suction port 122 outside the tank body 120. The suction port 123 is provided below the overhanging part 121. The suction port 123 passes through the tank body 120 along the inner peripheral surface of the tank body 120.

  According to the suction tank 100, when the air in the tank main body 120 is discharged by the suction device 140, dirty water can be sucked into the tank main body 120 from the toilet main body 500 through the suction port 123. At this time, if the inside of the tank main body 120 is in a negative pressure state to some extent and then the on-off valve 610 is opened, the sewage can be sucked in vigorously. 1 and 2, arrows W indicate the inflow direction of sewage. In the suction tank 100, the suction port 123 passes through the tank body 120 along the inner peripheral surface of the tank body 120.

  With this structure, the sewage flowing from the suction port 123 turns along the inner peripheral surface of the tank main body 120 below the overhanging portion 121. Further, the flow of sewage is controlled by the overhanging part 121 and is not easily scattered on the upper side of the tank body 120 (above the overhanging part 121). For this reason, cleaning and maintenance of the tank body 120 are easy. The suction port 122 is provided on the upper side of the overhanging portion 121 of the tank body 120. As described above, since the sewage hardly scatters to the upper side of the tank body 120 (above the overhanging part 121), the suction port 122 is less likely to get dirty. Moreover, sewage does not easily enter the suction port 122, and the suction port 122 is not easily clogged. Further, the liquid flowing in from the suction port 123 swirls along the inner peripheral surface of the tank main body 120 below the overhanging portion 121. The position where the sewage flows and the position where the sewage scatters in the tank body 120 is substantially the same. For this reason, the inside of the tank main body 120 can be cleaned by sucking the cleaning water into the tank main body 120 from the suction port 123. Therefore, it is advisable to perform such cleaning after use or periodically. Moreover, since the position where sewage flows or scatters within the tank main body 120 is in a limited region within the tank main body 120, the amount of cleaning water used for one cleaning can be reduced.

<Height K of the overhanging portion 121>
Here, the height K of the overhanging portion 121 is defined by the distance overhanging from the inner peripheral surface of the tank main body 120 to the inside of the tank main body 120 in a direction orthogonal to the tangent line T of the inner peripheral surface of the tank main body 120. The In addition, when the height of the overhang portion 121 is not uniform in the circumferential direction of the tank main body 120, the arithmetic average in the circumferential direction may be the height K of the overhang portion 121.

  For example, in this embodiment, the cross-sectional shape of the inner peripheral surface of the tank body 120 is a circle. The height K of the overhanging portion 121 is set to 0.5R from the inner peripheral surface of the tank main body 120 to the inner diameter R (radius) of the tank main body 120 (that is, half of the inner diameter R (radius) of the tank main body 120). Has been.

  The height of the overhanging portion 121 is, for example, 0.05R (1/1 of the inner diameter R (radius) of the tank main body 120) with respect to the inner diameter R (radius) of the tank main body 120 from the inner peripheral surface of the tank main body 120. 20) It may be set above. By setting the inner peripheral surface of the tank main body 120 to 0.05 R or more with respect to the inner diameter R (radius) of the tank main body 120, the liquid flowing into the tank main body 120 from the suction port 123 is allowed to flow into the inner periphery of the tank main body 120. The function of turning stably along the surface is recognized. From this viewpoint, the height K of the overhang portion 121 is preferably higher. Further, from this viewpoint, for example, it may be set to 0.1R or more, or 0.2R or more.

  Moreover, the opening 121a at the center of the overhanging portion 121 only needs to have air permeability so that air can be smoothly sucked out of the tank body 120 by the suction device 140. For this reason, the opening 121a may be small. Further, in view of preventing the liquid flowing into the tank main body 120 from the suction port 123 from splashing upward from the overhanging portion 121, the height K of the overhanging portion 121 is preferably high. For this reason, the height of the overhanging portion 121 is 0.9R from the inner peripheral surface of the tank main body 120 to the inner diameter R (radius) of the tank main body 120 (that is, 90% of the inner diameter R (radius) of the tank main body 120). ) May be set to a degree.

  Further, the height K of the overhang portion 121 is preferably 2 cm or more, for example. By setting the height K of the overhanging portion 121 to be 2 cm or more, a function of allowing the liquid flowing into the tank main body 120 from the suction port 123 to stably rotate along the inner peripheral surface of the tank main body 120 is recognized. From this viewpoint, the height K of the overhang portion 121 is preferably higher. The height K of the overhang portion 121 is more preferably 3 cm or more, further preferably 5 cm or more, for example, about 10 cm. If the overhanging part 121 becomes high, the liquid flowing in from the suction port 123 is less likely to scatter upward than the overhanging part 121.

<< Arrangement of Suction Port 123 >>
The suction port 123 penetrates the tank body 120 along the inner peripheral surface of the cylindrical tank body 120. The suction port 123 may be provided so that the liquid flowing into the tank main body 120 turns along the inner peripheral surface of the cylindrical tank main body 120.

  In the form shown in FIG. 2, the cylindrical tank body 120 is arranged with the central axis D oriented vertically. FIG. 4 is a partial cross-sectional view of the tank main body 120, showing the IV-IV cross section of FIG. In FIG. 4, the tank main body 120 is in a state before the suction port 122 and the reflux port 143b are formed. In the illustrated example of FIG. 4, the tank body 120 is provided with thick protrusions 126 at portions where the suction port 122 and the reflux port 143 b are planned to be formed. In this embodiment, when the tank main body 120 is disposed, the protrusion 126 may be processed to appropriately form the suction port 122 and the reflux port 143b. As shown in FIG. 2, in a cross section that horizontally crosses the tank main body 120, a position X set on the inner diameter side of the distance corresponding to the inner diameter (radius) of the suction port 123 with respect to the inner peripheral surface of the tank main body 120. The center axis C of the suction port 123 is set along a line T1 parallel to the tangent line T of the inner peripheral surface of the tank body 120 with reference to (reference position X).

  In this embodiment, as shown in FIGS. 2 and 4, the suction port 123 penetrates horizontally to the tank body 120 in parallel with the tangent line T of the inner peripheral surface of the cylindrical tank body 120. In the suction port 123, the inner side surface of the suction port 123 and the inner peripheral surface of the tank body 120 are approximately smoothly continuous. For this reason, the sewage flowing from the suction port 123 turns smoothly along the inner peripheral surface of the tank body 120.

  The suction port 123 is good to penetrate the tank main body 120 along the inner peripheral surface of the cylindrical tank main body 120, and is not limited to this form. In the suction tank 100, the suction port 123 penetrates the tank body 120 along the inner peripheral surface of the cylindrical tank body 120, so that sewage flowing from the suction port 123 is allowed to flow inside the tank body 120. It is good to turn smoothly along the surface. Thereby, the sewage flowing into the tank main body 120 can be easily controlled, and the sewage can be hardly scattered in the tank main body 120 by the overhanging portion 121.

  Thus, in view of smoothly turning the sewage flowing from the suction port 123 along the inner peripheral surface of the tank main body 120, the suction port 123 is formed along the inner peripheral surface of the cylindrical tank main body 120. The tank body 120 may be penetrated. The form shown in FIG. 2 is a preferred form in which the suction port 123 penetrates the tank body 120 along the inner peripheral surface of the cylindrical tank body 120. However, the suction port 123 provided in the tank main body 120 is not limited to such a form.

  The suction port 123 may penetrate the tank body 120 along the inner peripheral surface of the cylindrical tank body 120. For example, the angle through which the suction port 123 penetrates the tank body 120 is not limited to the form shown in FIG. 5 to 8 are modifications in which the arrangement of the suction ports 123 with respect to the inner peripheral surface of the tank body 120 is changed based on the arrangement of the form of FIG.

  For example, in the form shown in FIG. 5, the central axis C of the suction port 123 that penetrates the tank main body 120 is tilted downward with respect to the reference position X so that the inflow direction W is directed downward. Even in this configuration, the sewage flowing from the suction port 123 can be smoothly swung along the inner peripheral surface of the tank main body 120. In addition, although illustration is abbreviate | omitted, the central axis C of the suction inlet 123 which penetrates the tank main body 120 may be inclined upwards with respect to the reference position X so that the inflow direction W may face upwards.

  In the form shown in FIG. 6, the central axis C of the suction port 123 that penetrates the tank main body 120 is inclined in the outer diameter direction with respect to the reference position X so that the inflow direction W faces the outer diameter side. . Even in this configuration, the sewage flowing from the suction port 123 can be smoothly swung along the inner peripheral surface of the tank main body 120. In this case, the sewage flowing in from the suction port 123 turns along the inner peripheral surface of the tank main body 120 while slightly colliding with the inner wall of the tank main body 120.

  In the form shown in FIG. 7, the central axis C of the suction port 123 that penetrates the tank main body 120 is inclined in the inner diameter direction with respect to the reference position X so that the inflow direction W faces the inner diameter side. Even in this configuration, the sewage flowing from the suction port 123 can be smoothly swung along the inner peripheral surface of the tank main body 120. In this case, the sewage flowing from the suction port 123 slightly flows into the tank main body 120, collides with the inner wall of the tank main body 120, and turns along the inner peripheral surface of the tank main body 120.

  In the form shown in FIG. 8, the central axis C of the suction port 123 that penetrates the tank body 120 penetrates the tank body 120 in a direction parallel to the tangent line T of the inner peripheral surface of the tank body 120. In the form shown in FIG. 8, the suction port 123 is provided in the tank body 120 by shifting (offset) in the outer diameter direction as compared with the form of FIG. 2. Even in this configuration, the sewage flowing from the suction port 123 can be smoothly swung along the inner peripheral surface of the tank main body 120. In addition, although illustration is abbreviate | omitted, you may provide the suction inlet 123 in the tank main body 120 by shifting to an internal diameter direction compared with the form of FIG.

  Moreover, the position of the height direction which provides the suction inlet 123 can also be changed suitably, for example, you may provide in a high position so that it may approach the overhang | projection part 121 compared with the form of FIG. Moreover, you may provide in a low position so that it may leave | separate from the overhang | projection part 121 compared with the form of FIG.

  In this way, the suction port 123 is arranged with respect to the tank body 120 upward, downward, inclined in the inner diameter direction, inclined in the outer diameter direction, shifted in the radial direction, or in the height direction. The positions may be changed, and these arrangements may be combined. Further, when the central axis C of the suction port 123 penetrating the tank body 120 is inclined in the vertical direction or the radial direction, the angle of the central axis C of the suction port 123 with respect to the horizontal plane H or the central axis C of the suction port 123 with respect to the vertical plane. The angle may be 45 degrees or less, more preferably 30 degrees or less, and still more preferably 20 degrees or less. Such an angle, an offset amount, and the like may be appropriately set according to the degree of negative pressure when sewage is drawn into the tank body 120. Here, the suction port 123 is exemplified by a through hole attached to a straight pipeline, but the pipeline 123a attached to the suction port 123 may be curved.

<< Partition 234 >>
FIG. 9 is a schematic view showing another form of the suction tank 100 and the negative pressure suction toilet 1000 proposed here. In the suction tank 100 shown in FIG. 9, a partition 234 is attached to the opening 121 a in the center portion of the overhang portion 121. The partition 234 is attached to the opening 121 a of the overhang portion 121 and partitions the upper side and the lower side of the overhang portion 121. The partition 234 can be ventilated and blocks liquid. As the partition 234, for example, a coarse sponge, a composite material in which sheet materials having air permeability are stacked, a nonwoven fabric sheet, or the like may be used.

  That is, the partition 234 has a structure in which the sewage sucked to the lower side of the suction tank 100 does not rise to the upper side, and has air permeability so that the air in the suction tank 100 can be sucked by the suction device 140. It is good to have. Although not shown, a support material that supports the partition 234 may be disposed above or below the partition. The support material may be, for example, a lattice-like member that is attached to the opening 121a of the overhang portion 121. The support material may be made of a hard plastic material, for example. Although not shown, one opening 121a provided in the overhang portion 121 may be provided in the center portion of the overhang portion 121, or a plurality of openings 121a may be provided in the center portion. For example, a plurality of small-diameter holes for ensuring air permeability may be provided in the central portion of the overhang portion 121.

<Suction device 140>
The suction device may be an intake device, for example. Here, the intake device is a device that uses the back pressure of a blower operated by an electric motor, and a mechanism that is generally employed in a vacuum cleaner can be employed. For example, an apparatus that includes an electric fan driven by an electric motor and supplies air in a certain direction can be used. The function as the suction device 140 is better as the suction power of the suction device 140 is higher. The suction power of the suction device 140 may be evaluated according to the suction power measurement method of JIS C9108. As a standard of the suction power of the suction device 140, when the internal capacity of the tank body 120 is 20L or less, the suction power of the suction device 140 is preferably 70W or more, for example. Moreover, when the internal volume of the tank main body 120 is 20 L or more, the suction power of the suction device 140 is preferably, for example, 100 W or more.

  The suction device 140 may be a vacuum pump, for example. Here, the vacuum pump is only required to be able to realize a vacuum degree of about −30 kPa or more, more preferably a vacuum degree of −50 kpa or more with respect to the atmospheric pressure. Good.

《Negative pressure suction toilet 1000》
Further, as described above, the negative pressure suction toilet 1000 may include the suction tank 100, the toilet body 500, and the pipe 600 that connects the toilet body 500 and the tank body 120. In this case, the toilet body 500 may be provided with an outlet 510 at the bottom. The pipe 600 connects the discharge port 510 of the toilet body 500 and the suction port 123 of the tank body 120, and an opening / closing valve 610 is provided in at least one of the discharge port 510, the suction port 123 and the pipe 600. It is good to be.

  Further, as described above, the control device 700 starts the suction of the suction device 140 with the on-off valve 610 being closed, and the on-off valve after a predetermined time elapses from the timing at which the suction of the suction device 140 is started. The on-off valve 610 and the suction device 140 may be controlled to open 610. As a result, the on-off valve 610 is opened in a state in which the tank body 120 has a certain negative pressure, so that the suction force by the suction tank 100 can be increased, and the negative pressure suction toilet 1000 can be more reliably filthated from the toilet body 500. Can inhale. Further, the control device 700 starts the suction of the suction device 140 in a state where the on-off valve 610 is closed, appropriately changes the time from when the suction of the suction device 140 is started until the on-off valve 610 is opened, Modes with different forces may be provided. In this case, the negative pressure suction type toilet 1000 can select a mode in which the suction force is different between when sucking filth containing stool and when sucking filth not containing stool based on the user's operation. May be provided.

  As described above, the suction tank 100 and the negative pressure suction toilet 1000 according to an embodiment of the present invention and various modifications have been described. However, the present invention is not limited to the above-described embodiments and modifications unless specifically mentioned. Further, various modifications are included.

  The present invention is industrially applicable as a suction tank and a negative pressure suction toilet.

100 Suction tank 120 Tank body 120a Supporting part (step)
120b Bottom surface 121 Overhang portion 121a Opening 122 Suction port 123 Suction port 123a Pipe 124 Disposal port 125 Lid 125a Lid portion 125b Insertion portion 125b1 Groove 125b2 Sealing material 140 Suction device 142 Pipe 143 Mist separator 143a Drain pipe 143b Recirculation port 144 On-off valve 200 annular member 210 base 210a flange 220 flange 220a knob 231 seal material 231a base 231b protrusion 232 groove 234 partition 500 toilet bowl body 510 outlet 600 pipe 610 on-off valve 700 controller 1000 negative pressure suction toilet C inlet 123 Center axis D center axis H of tank body 120 horizontal plane K height of overhanging portion 121 inner diameter S1 of tank body 120 upper region S2 lower region T tangent line W inflow direction X reference position

Claims (15)

A tank body with a cylindrical inner peripheral surface;
A suction device for sucking out the gas in the tank body to the outside,
The tank body is
In the intermediate portion of the tank body in the height direction, an overhanging portion that projects continuously from the inner circumferential surface of the tank body to the inner diameter side in the circumferential direction;
A suction port provided on the upper side of the overhang, and connected to the suction device on the outside of the tank body;
Provided below the projecting portion, and provided with a suction port penetrating the tank body along the inner peripheral surface of the tank body,
Suction tank.   2. The suction tank according to claim 1, wherein a lower surface of the overhang portion extends downward as it goes inward of the tank body.   The suction tank according to claim 1 or 2, wherein a cross-sectional shape of an inner peripheral surface of the tank body is circular.   The height K at which the projecting portion projects from the inner peripheral surface of the tank body toward the inner diameter side of the tank body is 0.05R ≦ T with respect to the inner diameter R of the tank body from the inner peripheral surface of the tank body. The suction tank according to claim 3, which has a relationship of ≦ 0.9R.   The overhanging portion is perpendicular to a tangent to the inner peripheral surface of the tank main body, and a height K protruding from the inner peripheral surface of the tank main body to the inside of the tank main body is 2 cm or more. The suction tank described in any one of 4 to 4.   The suction tank according to any one of claims 1 to 5, wherein the overhang portion is provided separately from the tank main body.   The suction tank according to claim 6, wherein the projecting portion is an annular member attached to an intermediate portion between the suction port and the suction port of the tank body.   The suction tank according to claim 6 or 7, wherein the overhanging portion includes a sealing material that seals a gap with an inner peripheral surface of the tank main body.   The partition which partitions the upper side and lower side of an overhang | projection part is attached to the internal diameter side of the said overhang | projection part, The said partition can ventilate and blocks | interrupts a liquid, The suction tank described in any one of the items.   The suction tank according to any one of claims 1 to 9, wherein a disposal port is provided at a bottom of the tank body.   The suction tank according to claim 10, wherein a bottom surface of the tank body is gradually lowered toward the disposal port at least around the disposal port.   The suction tank according to any one of claims 1 to 11, wherein the suction device is an intake device that uses a back pressure of a blower operated by an electric motor.   The suction tank according to any one of claims 1 to 11, wherein the suction device is a vacuum pump. A suction tank according to any one of claims 1 to 13;
The toilet body,
A pipe connecting the toilet body and the tank body;
The toilet body has a discharge port at the bottom,
The piping is
Connecting the outlet of the toilet body and the suction port of the tank body;
An opening / closing valve is provided in at least one of the discharge port, the suction port, and the pipe;
Negative pressure suction toilet. A control device for operating the on-off valve;
The control device starts suction of the suction device in a state where the on-off valve is closed,
The negative pressure suction type toilet according to claim 14, wherein the on-off valve is opened after a predetermined time elapses from a timing at which suction of the suction device is started.

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