TW202003970A - Storage tank comprising a peripheral wall and a partition wall erected relative to a bottom surface - Google Patents

Abstract

Provided is a novel storage tank that allows multiple liquids to smoothly and quickly flow out. The storage tank, which comprises an inlet for entry of a liquid and an outlet for exit of the liquid so as to store the liquid entering through the inlet in an interior thereof, includes a peripheral wall that is erected relative to a bottom surface and a partition wall that is erected relative to the bottom surface. The peripheral wall includes an inlet portion formed with the inlet and an outlet portion that is opposite to the inlet portion and formed with the outlet. The partition wall is extended in a direction toward the outlet.

Description

Storage tank (1)

The invention relates to a storage tank.

As a drainage system for a housing complex, there is a system called the siphon drainage system that utilizes the siphon principle. According to the siphon drainage system, when draining water from a water-using machine, the drainage can be promoted by the siphon force generated by the siphon drain. On the other hand, in the siphon drainage system, if it is assumed that a large amount of liquid is drained at a time, it must be installed upstream of the siphon drain pipe to temporarily store the water until the start of drainage (siphoning) Storage tank for liquids. Such a storage tank has a storage channel provided with a flow channel narrowing portion between the outlet of the storage tank and the storage tank body, and a part of the flow channel narrowing portion is provided with a storage tank that swells to the outside of the inner wall surface (refer to For example, Patent Document 1.).

[Prior Technical Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2016-108749

According to the above-mentioned storage tank, the liquid staying in the vicinity of the outflow port will be guided along the inner wall surface of the narrowing portion of the flow path away from the outflow port. Thereby, according to the above-mentioned storage tank, the flow of liquid is not hindered near the outflow port, and most of the liquid can flow out quickly and smoothly.

However, for example, even in the case of using the storage tank described above, there is still room for improvement to allow a large amount of liquid to flow out more quickly and smoothly.

The object of the present invention is to provide a novel storage tank that allows most liquids to flow out quickly and smoothly.

The storage tank according to the present invention is focused on the point that when the head of the liquid near the outlet is rapidly raised, a large amount of liquid can flow out quickly and smoothly.

The storage tank related to the present invention has: an inflow port for allowing liquid to flow in; and an outflow port for allowing the liquid to flow out, and a storage tank for storing the liquid flowing in from the inflow port in the interior; equipped with: a peripheral wall, Standing with respect to the bottom surface; and partition wall, standing with respect to the bottom surface; the peripheral wall is provided with: an inlet portion formed with the inlet; and an outlet portion opposed to the inlet portion, and The outflow port is formed; the partition wall extends toward the outflow port.

According to the storage tank related to the present invention, the head of the liquid near the outflow port can be rapidly raised. Therefore, according to the storage tank of the present invention, most liquids can flow out quickly and smoothly.

In the storage tank related to the present invention, the partition wall preferably has a height that allows the liquid to overflow from the partition wall.

In this case, when the head of the liquid near the outlet is above a predetermined level, the liquid near the outlet can flow out from the partition wall. Therefore, it is difficult for the flow of liquid to be obstructed near the outflow port, and rapid and smooth drainage can be performed.

In the storage tank related to the present invention, the height of the partition wall preferably becomes higher toward the outflow port.

In this case, the head of liquid near the outflow port can be increased, and as the distance from the outflow port increases, the amount of liquid flowing out from the partition wall increases.

In the storage tank related to the present invention, the outflow port is preferably disposed at a position lower than the inflow port.

In this case, you can drain water more quickly and smoothly.

In the storage tank related to the present invention, preferably, the partition wall is configured as a part of the outflow port portion of the peripheral wall; the inner face of the outflow side adjacent portion of the peripheral wall adjacent to the outflow port portion of the peripheral wall is It is connected to the top surface of the partition wall of the area and forms the same surface as the top surface of the partition wall of the area. Here, the "same plane" refers to "smoothly connected continuous planes", and also includes any of "planar planes" and "curved planes".

In this case, the liquid flowing out from the partition wall can further flow out along the inner surface of the adjacent portion on the outflow side of the peripheral wall.

In the storage tank related to the present invention, the end edge portion of the top surface of the partition wall is preferably a curved surface protruding toward the inside of the storage tank.

In this case, the liquid in the vicinity of the outflow port can flow out more efficiently and smoothly from the partition wall along the inner surface of the adjacent portion on the outflow side of the peripheral wall.

In the storage tank related to the present invention, the inflow port portion of the peripheral wall is preferably recessed on the outflow side from the inflow side adjacent portion of the peripheral wall adjacent to the inflow port portion of the peripheral wall.

In this case, the liquid flowing in the storage tank will easily return to the direction of liquid outflow. Therefore, drainage can be performed more quickly and smoothly.

In the storage tank related to the present invention, the partition wall preferably stands from a position adjacent to the groove.

In this case, even a small amount of liquid can be quickly collected by the groove. Therefore, drainage can be performed more quickly and smoothly. In particular, in this case, since the partition wall will stand from the position adjacent to the groove, the liquid head near the outflow port can be raised more quickly.

The outflow port portion of the peripheral wall preferably protrudes from the outflow side to the outflow side abutting portion of the peripheral wall adjacent to the outflow port portion of the peripheral wall.

In this case, it becomes a structure that easily collects liquid near the outlet. Therefore, according to the storage tank of the present invention, most liquids can flow out quickly and smoothly.

In the storage tank according to the present invention, the cross-sectional shape of the inner surface of the peripheral portion adjacent to the outflow side in a plan view is preferably a curved surface formed by a curve protruding toward the outflow side.

In this case, the liquid flowing out of the partition wall can be convected (circulated) in the vertical direction (longitudinal direction) and further flow out along the inner surface of the adjacent portion of the peripheral wall on the outflow side.

The storage tank related to the present invention preferably includes: a liquid passage area extending between the inlet and the outlet; and a liquid retention area respectively disposed on both sides sandwiching the liquid passage area s position.

In this case, the liquid can flow to the liquid passage area, and the remaining liquid can be retained in the liquid retention area. Therefore, it is difficult for the flow of the liquid to be obstructed near the outflow port, and a given amount of drainage can be continuously performed more quickly and smoothly.

In the storage tank according to the present invention, in the inner surface of the peripheral wall, the contour of the inner surface of the peripheral wall in which a corner portion is formed inside the storage tank in a plan view is preferably constituted by a curve in a plan view Surface.

In this case, the liquid flowing through the liquid passage area can be more efficiently convected between the liquid passage area and the liquid retention area.

According to the present invention, it is possible to provide a novel storage tank that allows most liquid to flow out quickly and smoothly.

1A‧‧‧Storage tank

1B‧‧‧Storage tank

A1‧‧‧Flow inlet

P1‧‧‧Inflow path

A2‧‧‧Outlet

P2‧‧‧ Outflow path

1c‧‧‧vent

11‧‧‧Bottom wall

11a‧‧‧Lower part of bottom wall

11fa‧‧‧Inner surface of the lower part of the bottom wall

11fa1‧‧‧The deepest part of the lower part of the bottom wall

11fa2‧‧‧The side of the lower part of the bottom wall

11b‧‧‧The upper part of the bottom wall

11fb‧‧‧Inner surface of the lower part of the bottom wall

12‧‧‧ Zhoubi

12a‧‧‧The inlet part of the perimeter wall

12fa‧‧‧The inner surface of the inlet part of the peripheral wall

12fa1‧‧‧The deepest surface of the inner surface of the inlet part of the peripheral wall

12fa2‧‧‧The side of the inner surface of the inlet part of the peripheral wall

12b‧‧‧Outlet part of the wall

12fb‧‧‧The inner surface of the outlet of the peripheral wall

12fb1 The deepest surface of the inner surface of the outflow part of the peripheral wall

12fb2 Side surface of the inner surface of the outflow part of the peripheral wall

12c‧‧‧The adjoining part of the inlet of the perimeter wall

12fc‧‧‧The inner surface of the inlet part of the peripheral wall adjacent to the inner surface

12d‧‧‧ Adjacent to the outlet of the perimeter wall

12fd‧‧‧The inner surface of the adjacent part of the outlet of the peripheral wall

12e‧‧‧Side part of the perimeter wall

12fe‧‧‧Inner surface of the side part of the peripheral wall

12f‧‧‧The inflow side corner of the peripheral wall

12ff‧‧‧Inner surface of the inflow side corner of the peripheral wall

12i‧‧‧ Inflow side corner of the peripheral wall

12fi‧‧‧Inner surface of the inflow side corner of the peripheral wall

12j‧‧‧The inflow side corner of the peripheral wall

12fj‧‧‧The inner surface of the inflow side corner of the peripheral wall

12g‧‧‧The corner of the outflow side of the peripheral wall

12fg‧‧‧The inner surface of the corner part of the outflow side of the peripheral wall

13‧‧‧ next door

13f1‧‧‧Side next to the side

13f2‧‧‧The top surface next to the district

13e‧‧‧End of the top surface of the partition

R1‧‧‧Liquid passage area

G‧‧‧Ditch

F1‧‧‧Bottom surface of liquid passing area

R2‧‧‧Bottom surface of liquid retention area

100‧‧‧Drainage system

101‧‧‧Floor member

102‧‧‧Slab

110‧‧‧ water appliance

120‧‧‧Equipment drain

120a‧‧‧Upstream part of appliance drain

120b‧‧‧The downstream part of the appliance drain

121‧‧‧ Drainage and Capture Department

130‧‧‧siphon drain

130a ‧ ‧ ‧siphonic horizontal pipe

130b‧‧‧ riser of siphon drain

140‧‧‧pipe joint

150‧‧‧Riser

S‧‧‧Underfloor space

1 is a perspective view showing the inflow side of the storage tank according to the first embodiment of the present invention from above.

FIG. 2 is a perspective view showing the outflow side of the storage tank of FIG. 1 from above.

FIG. 3 is a front view showing the inflow side of the storage tank of FIG. 1. FIG.

4 is a rear view showing the outflow side of the storage tank of FIG. 1.

FIG. 5 is a top view showing the storage tank of FIG. 1 from above.

FIG. 6 is a bottom view showing the storage tank of FIG. 1 from below.

7 is a cross-sectional view taken along line A-A of FIG. 3.

Fig. 8 is a sectional view taken along the line B-B in Fig. 3.

9 is a cross-sectional view taken along line C-C in FIG. 4.

FIG. 10 is a right side view showing the storage tank of FIG. 1 from the right side.

11 is a left side view showing the storage tank of FIG. 1 from the left side.

Fig. 12 is a D-D cross-sectional view of Fig. 5.

Fig. 13 is an E-E cross-sectional view of Fig. 5.

Fig. 14 is a perspective view showing the F-F section of Fig. 5 from the inflow side.

FIG. 15 is a perspective view showing the G-G section of FIG. 5 from the inflow side.

FIG. 16 is a G-G cross-sectional view of FIG. 5.

Fig. 17 is a H-H cross-sectional view of Fig. 5.

18 is a perspective view showing the inflow side of the storage tank according to the second embodiment of the present invention from above.

FIG. 19 is a schematic system diagram showing an example of a drainage system applicable to the storage tank of the present invention in a partial section.

Hereinafter, the storage tanks related to the embodiments of the present invention will be described in detail with reference to the drawings.

[Drainage system applicable to the storage tank of the present invention]

FIG. 19 is a schematic system diagram showing an example of a drainage system applicable to the storage tank of the present invention in a partial section. In FIG. 19, symbol 100 is an example of a drainage system applicable to a storage tank according to an embodiment of the present invention. In this example, the drainage system 100 is a siphon drainage system. The siphon drainage system is a drainage system using the principle of siphon. According to the siphon drainage system, when draining water from a water-using machine, the drainage can be promoted by the siphon force generated by the siphon drain. The siphon drainage system is adopted as, for example, a drainage system that divides a building into a multiple-story housing complex.

In this example, the drainage system 100 includes a water appliance 110, an appliance drain pipe 120, a storage tank 1 according to an embodiment of the present invention, and a siphon drain pipe 130.

The water appliance 110 is arranged on each floor of the building. The water appliance 110 is exemplified by, for example, a bathtub (for example, a bathroom), a washstand, and a flow table. In this example, the water appliance 110 is a bathtub.

The appliance drain pipe 120 connects the water appliance 110 and the storage tank 1. In this example, the appliance drain 120 is arranged in the space S under the floor. In this example, the under-floor space S is the space formed between the floor member 101 and the floor slab 102 of a building. In this example, the appliance drain pipe 120 is composed of an upstream side portion 120a extending in the longitudinal direction and a downstream side portion 120b extending in the lateral direction. The upstream portion 120a is connected to the water appliance 110. The downstream portion 120b is connected to the upstream portion 120a. In this example, the downstream side portion 120b is inclined downward from the upstream side portion 120a toward the downstream. The downstream portion 120b is connected to the storage tank 1. In addition, in this example, the drain catching portion 121 is provided in the middle of the downstream portion 120b.

The siphon drain 130 is connected to the storage tank 1 and the riser 150. The riser 150 is a drainage pipe that penetrates each floor of the building in the up-down direction. In this example, the siphon drain pipe 130 is composed of a horizontal pipe 130a disposed in the under-floor space S and a vertical pipe 130b penetrating downwards through the floor 102. The horizontal tube 130a is connected to the storage tank 1. In this example, the lateral tube 130a extends laterally in an almost horizontal manner without tilting. In detail, the piping is installed along the floor 102 on the floor where the water appliance 110 is installed to be slightly horizontal without tilting. The vertical pipe 130b is connected to the horizontal pipe 130a. The vertical pipe 130b is connected to the stand pipe 150 through the pipe joint 140. In detail, the vertical tube 130b extends slightly vertically below the horizontal tube 130a, and forms a sag to generate a siphoning force (eg, negative pressure).

In the drainage system 100 of the present example, first, the liquid H flows out of the water appliance 110 from the height difference H1 between the outlet of the water appliance 110 and the horizontal pipe 130a of the siphon drain tube 130. The liquid (for example, water) flowing out of the water appliance 110 will flow into the storage tank 1 from the appliance drain pipe 120 due to the weight of the liquid (decrease squeezing force). The storage tank 1 will store a part of the liquid inside while letting the remaining liquid flow out to the siphon drain 130.

In this example, the siphon drain 130 forms a siphon drain path that can generate an attractive force using siphon force. In the siphon drainage path, the drainage of the liquid from the siphon drain 130 can be promoted by the siphon force generated in the siphon drain 130.

In the siphon drainage path of this example, the descending squeezing force of the drainage from the water appliance 110 is caused by the height difference H1 between the outflow port of the water appliance 110 and the lateral tube 130a of the siphon drain tube 130 to make the appliance drain tube 120 And the horizontal pipe 130a of the siphon drain 130 is filled with water, and by filling the horizontal pipe 130a of the siphon drain 130, the drainage of the vertical pipe 130b (sag length H2) reaching the siphon drain 130 starts at the The vertical pipe 130b falls, and the horizontal pipe 130a of the siphon drain pipe 130 becomes full of water to generate a siphon effect. With this siphon action as the drain power, the high-speed flow generated in the siphon drain path drains the water appliance 110, and the drain is discharged smoothly and quickly toward the inside of the pipe joint 140.

In this example, since the siphon drainage system is used as the drainage system 100, it will become a full-flow drainage filled with water inside the drainage pipe. In this way, if the siphon drainage system is used as the drainage system 100, since the drainage of the liquid will become full-flow drainage, it is possible to prevent the solid matter from adhering to the pipe and use a small-diameter pipe. In addition, in this example, since the siphon drainage system is adopted as the drainage system 100, the drainage pipe can be arranged without tilting. In this way, if a siphonic drainage system is used as the drainage system 100, by arranging the drainage pipe without tilting, the height of the space under the floor where the drainage pipe is arranged can be reduced. Also, in this example, since the siphon drainage system is used as the drainage system 100, the extended distance from the drainage source (such as various water appliances 110) to the riser 150 (such as from the outflow of the water appliance 110 to the siphon drainage) can be extended The horizontal length L of the vertical tube 130b of the tube 130 (refer to FIG. 17) can even increase the degree of freedom in the configuration of the living room.

However, in the drainage system 100 adopting the siphon drainage system, it is assumed that the water appliance 110 will drain a large amount of liquid at once, and the storage tank 1 according to an embodiment of the present invention is provided between the appliance drain pipe 120 and the siphon drain pipe 130 . The storage tank 1 may temporarily store a large amount of water drained from the water appliance 110 at a time until drainage promotion (siphoning force generation) starts.

[Storage tank according to the first embodiment of the present invention]

FIG. 1 is a perspective view showing the inflow side of the storage tank 1A according to the first embodiment of the present invention from above. FIG. 2 is a perspective view showing the outflow side of the storage tank 1A of FIG. 1 from above. The storage tank 1A has an inflow port A1 that allows liquid to flow in and an outflow port A2 that allows the liquid to flow out, and can store the liquid flowing in from the inflow port A1 inside.

FIG. 3 is a front view showing the storage tank 1A from the inflow side. 4 is a rear view showing the storage tank 1A from the outflow side. As shown in FIG. 4, the storage tank 1A has a bottom wall 11, a peripheral wall 12 standing against the bottom surface, and two partition walls 13 standing against the bottom surface. In this embodiment, the storage tank 1A has a top wall 14. The top wall 14 is connected to the upper end of the peripheral wall 12. Therefore, in this embodiment, a space defined by the bottom wall 11, the peripheral wall 12 and the top wall 14 is formed inside the storage tank 1A. In this embodiment, the peripheral wall 12 is formed with a vent H12. The vent H12 allows the internal space of the storage tank 1A to communicate with the outside world. This prevents the inside of the storage tank 1A from becoming negative pressure.

FIG. 5 is a top view showing the storage tank 1A from above. FIG. 6 is a bottom view showing the storage tank 1A from below. As shown in FIG. 6, in the storage tank 1A, the peripheral wall 12 includes: an inlet portion 12a formed with an inlet A1; and an outlet portion 12b formed with an outlet A2 facing the inlet portion 12a. In this embodiment, the peripheral wall 12 includes an inflow port portion 12a, an outflow port portion 12b, an inflow side adjacent portion 12c adjacent to the inflow port portion 12a, an outflow side adjacent portion 12d adjacent to the outflow port portion 12b, and a side surface portion 12e. Further, in the present embodiment, the peripheral wall 12 includes an inflow-side corner portion 12f that connects the inflow-side adjacent portion 12c and the side surface portion 12e, and an outflow-side corner portion 12g that connects the side surface portion 12e and the outflow-side adjacent portion 12d.

As shown in FIG. 6, in the storage tank 1A, the bottom wall 11 is divided by the peripheral wall 12. As shown in FIG. 5, the top wall 14 is also divided by the peripheral wall 12 in the same manner as the bottom wall 11. In this embodiment, the top wall 14 has two openings A3. The opening A3 allows the internal space of the storage tank 1A to communicate with the outside world. In this embodiment, the peripheral wall 12 is on the top wall 14 side, and has recesses 12h at positions of the inflow-side corner portion 12f and the outflow-side corner portion 12g, respectively.

7 is a cross-sectional view taken along line A-A of FIG. 3. 7 is the largest cross-section of the storage tank 1A. Fig. 8 is a sectional view taken along the line B-B in Fig. 3. FIG. 8 is a cross section through the center Oa of the inflow port A1. 9 is a cross-sectional view taken along line C-C in FIG. 4. Fig. 9 is a cross section through the center Ob of the outflow port A2. As shown in FIG. 7 and the like, the storage tank 1A includes a liquid passage area R1 extending between the inflow port A1 and the outflow port A2, and a liquid retention area R2 disposed at positions on both sides of the liquid passage area R1. In the storage tank 1A, the liquid passage area R1 connects the inflow port A1 and the outflow port A2, and guides the liquid flowing from the inflow port A1 to the outflow port A2. The liquid passage area R1 may extend into a curved shape or a zigzag shape when viewed from above. In this embodiment, the liquid passage region R1 extends linearly as shown in FIGS. 7 to 9. As a result, the liquid passage area R1 becomes the shortest path as the liquid passage connecting the inflow port A1 and the outflow port A2.

On the other hand, as shown in FIG. 7 and the like, the two liquid retention regions R2 are arranged at positions sandwiching both sides of the liquid passage region R1, and are adjacent to the liquid passage region R1. The two liquid retention regions R2 allow the liquid flowing in from the inlet A1 to be retained respectively.

As shown in FIG. 7 and the like, in the storage tank 1A, the inlet portion 12a of the peripheral wall 12 is recessed on the outflow side from the inlet-side abutting portion 12c adjacent to the inlet portion 12a. In this embodiment, as shown in FIG. 7 and the like, the inflow-side adjacent portion 12c of the peripheral wall 12 is connected to the inflow portion 12a through two inflow-side corner portions 12j and 12i.

In addition, in the storage tank 1A, the outflow port portion 12b of the peripheral wall 12 protrudes from the outflow side adjacent portion 12d. In this embodiment, as shown in FIG. 7 etc., the outflow side adjacent portion 12d of the peripheral wall 12 is connected to the outflow portion 12b.

10 is a right side view showing the right side of the storage tank 1A. FIG. 11 is a left side view showing the left side of the storage tank 1A. As shown in FIG. 10 and the like, in the storage tank 1A, the inflow port A1 is located below the peripheral wall 12 except for the inflow port portion 12a and the outflow port portion 12b of the peripheral wall 12. Like the inflow port A1, the outflow port A2 is located below the peripheral wall 12 except for the inflow port portion 12a and the outflow port portion 12b of the peripheral wall 12.

Fig. 12 is a D-D cross-sectional view of Fig. 5. FIG. 12 is a cross section that bisects the storage tank 1A. FIG. 12 shows the internal structure of the liquid passage region R1 and the liquid retention region R2 in the storage tank 1A. Fig. 13 is an E-E cross-sectional view of Fig. 5. FIG. 13 shows the internal structure of the liquid retention region R2 in the interior of the storage tank 1A. As shown in FIG. 12, in the storage tank 1A, the inflow port A1 is constituted by the inflow path P1 formed in the inflow port portion 12 a of the peripheral wall 12. In addition, the outflow port A2 is constituted by the outflow path P2 formed in the outflow port portion 12b of the peripheral wall 12. In the storage tank 1A, the liquid passage area R1 is defined by the inner surface 12fa of the inlet portion 12a of the peripheral wall 12, the inner surface (bottom surface) 11fa of the lower portion 11a of the bottom wall 11 and the outlet portion of the peripheral wall 12 The inner surface 12fb of 12b is comprised. In the storage tank 1A, as shown in FIG. 12, the bottom surface F1 of the liquid passage region R1 is constituted by a flat surface. In this embodiment, the bottom surface F1 of the liquid passage area R1 is the lowermost end of the inner surface 12fa of the inner surface 12fa of the inflow portion 12a of the peripheral wall 12 (extending the lowermost end of the liquid flow direction of the inflow portion 12a ) 12fa1, the lowermost end of the inner surface 11fa of the inner surface 11fa of the lower portion 11a of the bottom wall 11 (the lowermost extended end extending in the liquid flow direction of the lower portion 11a) 12fa1, and the outflow portion 12b of the peripheral wall 12 Of the inner surface 12fb of the innermost surface, the lowermost end of the inner surface 12fb (extending end extending to the lowermost side in the liquid flow direction of the outlet portion 12b) is constituted by the lowermost end 12fb1.

In addition, in FIG. 12, the symbol 12fp1 is the lowermost end of the inflow path P1 (the lowermost extension end extending in the liquid flow direction of the inflow path P1). In addition, the symbol 12fp2 is formed at the lowermost end of the outflow path P2 of the outflow port portion 12b (the lowermost extension end extending in the liquid flow direction of the outflow path P2). As shown in FIG. 12 and the like, in the storage tank 1A, the lowermost end (bottom surface) 11fa1 of the lower portion 11a of the bottom wall 11 is inclined downward toward the downstream, and the outlet A2 is provided at a position lower than the inlet A1.

On the other hand, as shown in FIG. 7 and the like, the two liquid retention regions R2 are viewed from above by the peripheral wall 12 of the peripheral wall 12 except for the inlet portion 12a and the outlet portion 12b, and the liquid passage region R1 Be divided. More specifically, the two liquid retention regions R2 are viewed from above in plan by the inner surface 12fi of the inflow-side corner portion 12i, the inner surface 12fj of the inflow-side corner portion 12j, the inner surface 12fc of the inflow-side adjacent portion 12c, and the inflow The inner surface 12ff of the side corner portion 12f, the inner surface 12fe of the side surface portion 12e, the inner surface 12fg of the outflow side corner portion 12g, the inner surface 12fd of the outflow side adjacent portion 12d, and the liquid are divided by the region R1. Further, as shown in FIG. 13 and the like, the two liquid retention regions R2 are composed of the inner surface (bottom surface) 11fb of the upper portion 11b of the bottom wall 11 in the bottom wall 11 and the inner surface (sky surface) of the top wall 14 Composed of 14f. In addition, in the storage tank 1A, as shown in FIG. 13, the bottom surface F2 of the liquid retention region R2 is constituted by a flat surface. In the present embodiment, the bottom surface F2 of the liquid retention region R2 is constituted by the inner surface 11fb of the upper portion 11b of the bottom wall 11.

Fig. 14 is a perspective view showing the F-F section of Fig. 5 from the inflow side. The F-F cross-section is a plane cross-section including the central axis of the two openings A3 of the top wall 14. As shown in FIG. 14, the groove G is arranged in the liquid passage region R1. The groove G is arranged between the inflow port A1 and the outflow port A2. As shown in FIG. 14 and the like, in the storage tank 1A, a part of the groove portion G is formed by the inner surface 11fa of the lower portion 11a of the bottom wall 11. In the storage tank 1A, the lower portion 11 a of the bottom wall 11 is recessed relative to the upper portion 11 b of the bottom wall 11. In this embodiment, the inner surface 11fa of the lower portion 11a of the bottom wall 11 is constituted by the deepest surface 11fa1 and the two side surfaces 11fa2. The deepest surface 11fa1 is the deepest surface (lowest end) in the bottom wall 11. The deepest surface 11fa1 is connected to the inner surface 11fb of the upper portion 11b of the bottom wall 11 through the side surface 11fa2. The deepest surface 11fa1 is viewed from the extending direction of the liquid passage region R1, and is connected with a curved surface formed by a curve with respect to the side surface 11fa2. The side surface 11fa2 is viewed from the extending direction of the liquid passage region R1, and is connected with a curved surface formed by a curve with respect to the inner surface 11fb of the upper portion 11b.

In the storage tank 1A, a part of the groove portion G is formed by the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12. As shown in FIG. 10 and the like, in the storage tank 1A, the outflow port portion 12b of the peripheral wall 12 extends to the lower side so that the outflow port A2 will be positioned lower than the outflow side adjacent portion 12d. As shown in FIG. 14, in this embodiment, the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12 includes the deepest surface 12fb1 and two side surfaces 11fb2. The deepest surface 12fb1 is viewed from the extending direction of the liquid passage region R1, and is connected with a curved surface formed by a curve with respect to the side surface 12fb2. The side surface 12fb2 forms the same plane as the side surface 11fa2 of the lower portion 11a of the bottom wall 11. The deepest surface 12fb1 is the deepest surface (lowest end) in the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12. The deepest surface 12fb1 forms the same plane as the deepest surface 11fa1 of the lower portion 11a of the bottom wall 11. The deepest surface 12fb1 is connected to the inner surface 13f1 of the partition wall 13 through the side surface 12fb2. The side surface 12fb2 forms the same plane as the inner surface 13f1 of the partition wall 13.

Further, as shown in FIG. 8 and the like, in the storage tank 1A, a part of the groove portion G is formed by the inner surface 11fa of the inlet portion 12a of the peripheral wall 12. As shown in FIG. 10 and the like, in the storage tank 1A, the inflow port portion 12a of the peripheral wall 12 extends to the lower side such that the inflow port A1 becomes a lower side than the inflow side adjacent portion 12c. As shown in FIG. 8, in the present embodiment, the inner surface 12fa of the inlet portion 12a of the peripheral wall 12 is composed of the deepest surface 12fa1 and two side surfaces 11fa2. The deepest surface 12fa1 is viewed from the extending direction of the liquid passage region R1, and is connected with a curved surface formed by a curve with respect to the side surface 12fa2. The side surface 12fa2 forms the same plane as the side surface 11fa2 of the lower portion 11a of the bottom wall 11. As shown in FIG. 12 and the like, the deepest surface 12fa1 is the deepest surface (lowest end) of the inner surface 12fa of the inlet portion 12a of the peripheral wall 12. The deepest surface 12fa1 forms the same plane as the deepest surface 11fa1 of the lower portion 11a of the bottom wall 11. As shown in FIG. 8 and the like, the deepest surface 12fa1 is connected to the inner surface 12fi of the inflow-side corner portion 12i through the side surface 12fa2.

As shown in FIG. 9 and the like, the two partition walls 13 extend toward the outlet A2. The storage tank 1A extends toward the outlet A2 so as to ensure the outlet A2. Here, the "guaranteed outlet A2" means "the opening of the outlet A2 is not closed".

Furthermore, as shown in FIG. 12, in the storage tank 1A, the partition wall 13 has a height H13 that allows the liquid to overflow from the partition wall 13. In this embodiment, the height H13 of the partition wall 13 is derived from the height of the bottom surface F1 of the liquid passage area R1. Thereby, the liquid passing through the liquid passage region R1 can flow to the liquid retention region R2 when the head of the liquid is higher than a predetermined value.

Also, as shown in FIG. 12 and the like, in the storage tank 1A, the height H13 of the partition wall 13 becomes higher toward the outflow port A2. As shown in FIG. 12 and the like, in this embodiment, the cross-sectional shape of the top surface 13f2 of the partition wall 13 when viewed from the side is a curved surface formed by a curve protruding toward the outflow side. As shown in FIG. 12, in the present embodiment, the curve of the top surface 13f2 of the partition wall 13 is constituted by the radius of curvature R13.

In the storage tank 1A, the partition wall 13 is formed as a part of the outlet portion 12b of the peripheral wall 12. The partition 13 will stand from a position adjacent to the groove G. FIG. 15 is a perspective view showing the G-G section of FIG. 5 from the inflow side. The G-G section is a section of a plane including the boundary between the peripheral wall 12 and the bottom wall 11. As shown in FIG. 15 and the like, in the storage tank 1A, the inner surface 13f1 of the partition wall 13 is connected to the side surface 12fb2 of the inner surface 12fb of the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12 and constitutes the same as the side surface 12fb2 flat. In addition, in the storage tank 1A, the inner surface 12fd of the outflow side adjacent portion 12d of the peripheral wall 12 adjacent to the outflow portion 12b of the peripheral wall 12 is connected to the top surface 13f2 of the partition wall 13 and the top surface of the partition wall 13 13f2 forms the same side. Here, the so-called "same plane" refers to "smoothly connected continuous planes" and also includes any planes of "planar" and "curved".

FIG. 16 is a G-G cross-sectional view of FIG. 5. As shown in FIG. 16, in the storage tank 1A, the edge 13e of the top surface 13f2 of the partition wall 13 is a curved surface that protrudes toward the inside of the storage tank 1A.

Further, as shown in FIG. 13, in the storage tank 1A, the cross-sectional shape of the inner surface 12fd of the outflow side abutting portion 12d of the peripheral wall 12 viewed from the side is a curved surface formed by a curve protruding toward the outflow side. As shown in FIG. 13, in the present embodiment, the inner surface 13fd of the outflow side abutting portion 13d is configured with a radius of curvature Rd11 that is larger than the curve on the bottom wall 11 side. In this embodiment, the radius of curvature Rd11 is the same as the radius of curvature R13 of the curve forming the top surface 13f2 of the partition 13. On the other hand, the curve on the top wall 14 side is composed of a radius of curvature Rd14 that is smaller than the curve on the bottom wall 11 side.

The inventor of this case has made great efforts through experiments and research and found that in the storage tank used in the siphon drainage system, when the liquid head near the outlet of the storage tank is rapidly increased, most of the liquid can be quickly and smoothly Outflow can even shorten the time until the siphon force is generated. The storage tank 1A according to this embodiment focuses on the case where the liquid head near the outflow port A2 is rapidly raised, and it can be accomplished that a large amount of liquid can flow out quickly and smoothly.

As shown in FIG. 12 and the like, the storage tank 1A according to this embodiment has an inflow port A1 for allowing liquid to flow in and an outflow port A2 for allowing the liquid to flow out, and the liquid flowing in from the inflow port A1 can be stored inside Of the storage tank. The storage tank 1A has a peripheral wall 12 standing with respect to the bottom surface, and two partition walls 13 standing with respect to the bottom surface, the peripheral wall 12 is provided with an inlet portion 12a formed with an inlet A1, and facing the inlet portion 12a The outflow port portion 12b of the outflow port A2 is formed. The two partition walls 13 extend toward the outlet A2.

According to the storage tank 1A according to the present embodiment, by providing the partition wall 13, the flow of liquid toward the outlet A2 can be ensured as indicated by the arrow D1, and the liquid head near the outlet A2 can be quickly raised. Even when the liquid (drainage) flowing in from the inlet A1 is a small amount, according to the present embodiment, by providing the partition wall 13 in the storage tank 1A, the liquid head near the outlet A2 can be quickly raised, As a result, siphoning action can easily occur. For example, even when a large amount of liquid flows in from the inflow port A1, in the initial stage, a small amount of liquid reaches the vicinity of the outflow port A2. In this way, even if the amount of liquid near the outlet A2 is small, according to the present embodiment, the partition head 13 can be provided in the storage tank 1A to quickly raise the liquid head near the outlet A2, resulting in easy generation Siphon action. Therefore, according to the storage tank 1A according to this embodiment, most of the liquid can flow out quickly and smoothly. In particular, as in the present embodiment, if the storage tank 1A is used for a siphon drainage system, even when a large amount of liquid is discharged, the time until the siphon force is generated can be shortened.

In addition, as shown in FIG. 12, in this embodiment, the partition wall 13 has a height H13 that allows the liquid to overflow from the partition wall 13. In this case, when the liquid head near the outlet A2 is more than a predetermined value, as shown by the arrow D2 in FIG. 15 and the like, the liquid near the outlet A2 can be allowed to flow out from the partition wall 13. Therefore, according to the present embodiment, the flow of liquid is hardly obstructed near the outlet A2, and drainage can be performed more quickly and smoothly.

In addition, as shown in FIG. 12, in the present embodiment, the height H13 of the partition wall 13 becomes higher as it goes toward the outlet A2. In this case, the liquid head near the outflow port A2 can be raised, and the amount of liquid flowing out from the partition wall 13 can be increased as it moves away from the outflow port A2. Therefore, according to this embodiment, the balance between the shortening of the time until the generation of the siphon force and the smooth drainage (at the same time) can be achieved.

In addition, as shown in FIG. 12, in this embodiment, the outlet A2 is provided at a position lower than the inlet A1. In this case, drainage can be performed more quickly and smoothly. Therefore, according to this embodiment, the time until the siphon force is generated can be further shortened.

Also, as shown in FIG. 15 and the like, in this embodiment, the partition wall 13 is configured as a part of the outflow port portion 12b of the peripheral wall 12, and the outflow side adjacent portion 12d of the peripheral wall 12 adjacent to the outflow port portion 12b of the peripheral wall 12 The inner surface 12fd is connected to the top surface 13f2 of the partition wall 13, and forms the same surface as the top surface 13f2 of the partition wall 13. In this case, as indicated by the arrow D2, the liquid flowing out from the partition wall 13 can be further discharged along the inner surface 12fd of the adjacent portion 12d on the outflow side of the peripheral wall 12. Therefore, according to the present embodiment, the flow of liquid is hardly obstructed near the outlet A2, and drainage can be performed more quickly and smoothly.

In addition, as shown in FIG. 16, in this embodiment, the edge 13e of the top surface 13f2 of the partition wall 13 is a curved surface that protrudes toward the inside of the storage tank 1A. In this case, as indicated by the arrow D2, the liquid in the vicinity of the outlet A2 can be efficiently and smoothly discharged from the partition wall 13 along the inner surface 12fd of the adjacent portion 12d on the outflow side of the peripheral wall 12. Therefore, according to this embodiment, quick and smooth drainage can be efficiently performed.

Further, as shown in FIG. 13 and the like, in this embodiment, the cross-sectional shape of the inner surface 12fd of the outflow side abutting portion 12d of the peripheral wall 12 viewed from the side is a curved surface formed by a curve protruding toward the outflow side. In this case, as indicated by the arrow D3, the liquid flowing out from the partition wall can be convected (circulated) in the vertical direction (longitudinal direction) while adjoining the inner surface 12fd of the portion 12d adjacent to the outflow side of the peripheral wall 12 Outflow. Therefore, according to this embodiment, drainage can be performed more quickly and smoothly.

In particular, as shown in FIG. 7 and the like, the storage tank 1A according to the present embodiment includes a liquid passage region R1 extending between the inlet A1 and the outlet A2, and is disposed on both sides of the sandwiched liquid passage region R1. Position of liquid retention area R2. In this case, as indicated by arrows D1 and D2, the liquid can be allowed to flow to the liquid passage region R1, and the remaining liquid can be retained in the liquid retention region R2. Therefore, according to this embodiment, it is possible to suppress the length of the liquid passing region R1 in the extending direction from increasing, and store more liquid in the liquid retention region R2. Therefore, with the storage tank 1A, it is possible to make it difficult for the flow of liquid to be hindered near the outlet A2, and allow more liquid to be continuously discharged in a fixed amount, quickly and smoothly. Furthermore, in this case, the liquid flowing out of the liquid passage region R1 can be convected (circulated) between the liquid passage region R1 and the liquid retention region R2 as indicated by the arrow D4. Therefore, according to the present embodiment, it is possible to suppress the length of the liquid passing region R1 in the extending direction from being longer, and to discharge more liquid quickly and smoothly. Further, in this case, since the liquid flowing out of the liquid passage region R1 convects between the liquid passage region R1 and the liquid retention region R2, it is difficult for dirt to adhere to the inside of the storage tank 1A. Thereby, the number of operations required for washing the storage tank 1A can be reduced.

Further, according to this embodiment, since the liquid retention region R2 is disposed at a position sandwiching both sides of the liquid passage region R1, in order to ensure the volume of the liquid retention region R2, for example, as long as the liquid retention region R2 is increased The dimension (area) in the extending direction may be sufficient without increasing the height of the liquid retention region R2, or even the height of the storage tank 1A. Therefore, as in the present embodiment, for example, the direction in which the liquid retention region R2 extends is the horizontal direction on both sides of the liquid passing region R1, and the standing direction of the peripheral wall 12 becomes the vertical direction. If the storage tank 1A is provided on the floor 102 or the like, there is no need to ensure that the height of the under-floor space S is large, and most of the liquid can be quickly and smoothly discharged. Here, the "height of the storage tank 1A" refers to the height (dimension) of the storage tank 1A in the vertical direction. In other words, it is the height (dimension) of the circumferential direction of the peripheral wall 12 of the storage tank 1A.

From the above point of view, more specifically, for example, in this embodiment, the height of the storage tank 1A may be lower than the width of the storage tank 1A, and the height of the storage tank 1A is preferably less than 1/2 of the width of the storage tank 1A The height of the storage tank 1A is more preferably 1/3 or less of the width of the storage tank 1A. Here, the so-called "width of the storage tank 1" refers to 2 in the direction orthogonal to the height direction of the storage tank 1A and the extending direction of the liquid passage region R1 in the peripheral wall 12 of the storage tank 1A facing each other The maximum width between the peripheral walls 12. That is, referring to FIG. 7, it is the width (dimension) between the outer surfaces of the two peripheral walls (side walls) 12 e of the storage tank 1A arranged in the vertical direction of the drawing.

As shown in FIG. 7 and the like, in the storage tank 1A, the inlet portion 12a of the peripheral wall 12 is recessed on the outflow side from the inlet-side adjacent portion 12c of the peripheral wall 12 adjacent to the inlet portion 12a. In this case, the liquid flowing in the storage tank 1A will easily return to the outflow direction of the liquid. Therefore, drainage can be performed more quickly and smoothly. Especially in this embodiment, since the liquid retention region R2 is disposed adjacent to the liquid passage region R1, the liquid flowing from the liquid passage region R1 easily returns to the liquid passage region R1. That is, in this embodiment, it is possible to efficiently convect between the liquid passage region R1 and the liquid retention region R2. Therefore, according to this embodiment, most of the liquid can be discharged more quickly and smoothly through the liquid passage area R1. Moreover, in this embodiment, dirt becomes more difficult to adhere to the inside of the storage tank 1A. Thereby, the number of operations required for washing the storage tank 1A can be further reduced.

As shown in FIG. 15 and the like, the partition wall 13 stands from a position adjacent to the groove G. In this embodiment, the groove G is arranged in the liquid passage region R1. In this case, even a small amount of liquid can be quickly collected by the groove portion G. Therefore, drainage can be performed more quickly and smoothly. In the present embodiment, the partition wall 13 stands from a position adjacent to the groove G where the liquid passage area R1 is arranged. In this case, even a small amount of liquid can quickly collect the liquid to the liquid passage area R1. Therefore, according to this embodiment, most of the liquid can be discharged more quickly and smoothly through the liquid passage area R1. In particular, in this case, since the partition wall 13 stands from a position adjacent to the groove portion G disposed in the liquid passage area R1, the liquid head near the outflow port A2 can be raised more quickly. Therefore, according to the present embodiment, most of the liquid can be discharged more quickly and smoothly through the liquid passage area R1.

In addition, as shown in FIG. 7 and the like, in the inner surface 12f of the peripheral wall 12 of the storage tank 1A, the inner surface 12f of the peripheral wall 12 forming a corner portion inside the storage tank 1A in plan view is viewed in plan view The outline shape is a curved surface formed by curves. In this embodiment, for example, the inner surface 12fi of the inflow-side corner portion 12i, the inner surface 12fj of the inflow-side corner portion 12j, the inner surface 12ff of the inflow-side corner portion 12f, and the inner surface 12fg of the outflow-side corner portion 12g are viewed from above The outline shapes below are the curved surfaces formed by the curves. In this case, the liquid flowing in from the liquid passage region R1 can be convected more efficiently between the liquid passage region R1 and the liquid retention region R2. Therefore, according to this embodiment, most of the liquid can be discharged more smoothly, and the number of operations required for washing the storage tank 1A can be further reduced.

However, the inventors of this case have worked hard to find that in the storage tank used in the siphon drainage system, even if the liquid is collected near the outlet of the storage tank, most of the liquid can flow out quickly and smoothly. , Can even shorten the time until the generation of siphon force. The storage tank 1A according to this embodiment focuses on the case where the liquid is collected near the outlet A2, and it is possible to allow a large amount of liquid to flow out quickly and smoothly.

In the storage tank 1A, the outflow port portion 12b of the peripheral wall 12 protrudes to the outflow side from the outflow side abutting portion 12d of the peripheral wall 12 adjacent to the outflow port portion 12b of the peripheral wall 12. In this case, it will be a structure that easily collects liquid near the outlet A2. Therefore, according to this embodiment, most of the liquid can flow out quickly and smoothly. In particular, as in the present embodiment, if the storage tank 1A is used for a siphon drainage system, even if a large amount of liquid is discharged, the time until the siphon force is generated can be shortened.

Fig. 17 is a H-H cross-sectional view of Fig. 5. The H-H cross section is a cross section including a plane of the upper end of the peripheral wall 12 on the outflow side abutting portion 12d. As shown in FIG. 17, in the storage tank 1A, the cross-sectional shape of the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12 as viewed in the liquid flow direction is a race track shape. In this case, it will be easier to collect liquid near the outlet A2. In this embodiment, the racing track shape is a flat shape extending in the lateral direction (horizontal direction). Exemplary racetrack shapes are a racetrack shape with a single-sided single-center circle with one center O1 on one side, and a racetrack shape with two-sided double-centered circles with one center O1 and center O2 on one side 1. On one side, there are three raceways with three centers O1, O2 and O3. Further, the shape of the raceway with one three-sided center circle is exemplified by three centers O1~O3, which are the shape of a racetrack with one centered three-centered circle on one side, and two center O1 and one center O3 are arranged on the outside The shape of a raceway with a sharp tricentric circle on one side of the center O2, and the shape of a blunt tricentric circle with a center O2 between the two centers O1 and the center O3 on the inside. In this embodiment, the cross-sectional shape of the outflow port A2 is a shape similar to the shape of a racetrack with a sharp tricentric circle on one side. In addition, in this embodiment, the two centers O1 and the center O2 sandwiching one center O2 are not aligned, and a straight line is formed between A-B. In addition, the other sections are curves.

In particular, in the storage tank 1A, as shown in FIG. 7 and the like, the inner surface 12fb of the outlet portion 12b of the peripheral wall 12 includes a curved surface whose front end becomes narrower toward the outlet A2. In this case, it becomes easier to collect liquid near the outlet A2.

In addition, as shown in FIG. 16, in the storage tank 1A, the bottom surface F2 of the liquid retention region R2 is viewed in the extending direction of the liquid passage region R1, and is inclined downward toward the liquid passage region R1 and is connected to the liquid passage region The plane of the bottom surface F1 of R1. In this case, the liquid in the liquid retention region R2 circulates through the bottom surface F2 of the liquid retention region R2 and easily flows into the liquid passage region R1. Therefore, according to the present embodiment, most of the liquid can be discharged more smoothly through the liquid passage area R1. In the present embodiment, the bottom surface F2 of the liquid retention region R2 is relative to the horizontal axis (in FIG. 16, it is represented by the straight line Oy that appears when the horizontal plane is observed in the extending direction of the liquid passing region R1.) and is represented by the angle θ11b To tilt it. The angle θ11b can be appropriately set according to the content, size, etc. of the storage tank 1. The angle θ11b may be, for example, an angle of 0.5° to 5°. In the case where the angle θ11b does not reach 0.5°, the effect of convection on the formation of drainage is weak. In addition, when the angle θ11b is 5° or more, it becomes too slanted, so when the liquid does not completely enter the outlet A2 and water overflows, the overflowed liquid cannot smoothly flow to the liquid retention region R2.

In addition, in the storage tank 1A, as shown in FIG. 16, the bottom surfaces F2 of the two liquid retention regions R2 are inclined downward as they approach each other. In this case, if the lower end of the bottom surface F2 connecting the two liquid retention regions R2 is connected, the liquid passage region R1 can be a V-shaped groove having the connecting portion of the two bottom surfaces F2 as the groove bottom. Alternatively, if the lower ends of the bottom surfaces F2 of the two liquid retention regions R2 are connected through a plane, the liquid passage region R1 may be a trapezoidal V-shaped groove with the plane as the bottom of the groove. The bottom surface F1 of the liquid passing region R1 is located at the same height position as the bottom surface F2 of the two liquid retention regions R2.

On the other hand, as shown in FIG. 12 and the like, in the storage tank 1A, the bottom surface F1 of the liquid passage region R1 is arranged at a position lower than the bottom surface F2 of the liquid retention region R2. In this case, most of the liquid can be collected in the liquid passage area R1. Therefore, according to the present embodiment, most of the liquid can be discharged more smoothly through the liquid passage area R1. In the present embodiment, the groove G is arranged in the liquid passage region R1. The lowermost end 12fP2 of the outflow port A2 is arranged at a position lower than the bottom surface F2 of the liquid retention region R2.

In addition, as shown in FIGS. 12 to 16, etc., in this embodiment, at least the inner surface 12f of the peripheral wall 12 in the liquid retention region R2 is viewed in the extending direction of the peripheral wall 12 from the inside of the storage tank 1A The curved surface formed by the outward convex curve. In this case, the liquid flowing in from the liquid passage region R1 flows out along the inner surface 12fd of the adjacent portion 12d on the outflow side of the peripheral wall 12 while convection (circulation) in the vertical direction (longitudinal direction) occurs. Therefore, according to this embodiment, the convection between the liquid passage region R1 and the liquid retention region R2 can be performed more efficiently. Therefore, according to this embodiment, most of the liquid can be discharged more smoothly, and the number of operations required for washing the storage tank 1A can be further reduced.

In this embodiment, as shown in FIGS. 3 and 4, the liquid passage area R1 is viewed in the liquid flow direction (as viewed in the extending direction of the liquid passage area R1 ). At least part of A1 is arranged in such a way that they overlap on a straight line.

Referring to FIG. 3, a specific example of the arrangement of the inflow port A1 and the outflow port A2 is, for example, a method of combining any of the following (1) to (3).

(1) The center Oa of the inflow port A1 and the center Ob of the outflow port 1b are aligned on the same vertical line Oz as viewed in the extending direction of the liquid passage region R1.

(2) Adjust the size of the inner diameter of the inlet A1 (the size of the radius ra of the inlet A1) and the size of the inner diameter of the outlet A2 (the size of the radius rb of the outlet A2).

(3) Adjust the interval ΔZ between the center Oa of the inlet A1 and the center Ob of the outlet A2 in the vertical direction (direction of the vertical line Oz).

In the present embodiment, all the methods (1) to (3) are used to arrange the outflow port A2 so as to overlap with at least a part of the inflow port A1 when viewed from the extending direction of the liquid passage region R. In particular, as shown in FIG. 3, in this embodiment, (2) is set such that the size of the inner diameter of the outflow port A2 is smaller than the size of the inner diameter of the inflow port A1. As a result, the amount of liquid flowing out of the outlet A2 will be smaller than the amount of liquid flowing in from the inlet A1. Furthermore, in this embodiment, as shown in FIG. 3, in (3), the center Oa of the inflow port A1 and the center Ob of the outflow port A2 are such that the upper end of the opening of the outflow port A2 overlaps the opening of the inflow port A1 Adjust the vertical interval △Z by the way of the lower end.

[Storage tank according to the second embodiment of the present invention]

18 is a perspective view showing the inflow side of the storage tank 1B according to the second embodiment of the present invention from above. In the present embodiment, the peripheral wall 12 surrounds the liquid passage region R1 and the two liquid retention regions R2 arranged on both sides of the liquid passage region R1, and forms the outer shape of the storage tank 1B into a dish shape (H type). In this embodiment, the partition wall 13 is a wall different from the peripheral wall 12.

The above matters are used to explain the exemplary embodiment of the present invention, and various changes can be made without exceeding the scope of the patent application. For example, the storage tank 1 can be integrally manufactured by injection molding of resin. In particular, the storage tank 1A can be formed by blow molding. However, the manufacturing method of the storage tank 1 is not limited to injection molding. Whether the storage tank 1 has a top wall 14 formed on the upper end of the peripheral wall 12 or not. In addition, the structure of the drainage system 100 is not limited to the structure of this embodiment. For example, although the appliance drain pipe 120 and the siphon drain pipe 130 are described as separate drain pipes in which the upstream portion (transverse pipe) and the downstream portion (vertical pipe) are integrated, the upstream portion (transverse pipe) ) And the downstream part (standpipe) are different drain pipes, and these drain pipes are connected to each other to serve as an appliance drain pipe 120 or a siphon drain pipe 130. In addition, the various configurations employed in the storage tank 1A or the storage tank 2B can be appropriately replaced with each other.

1A‧‧‧Storage tank

11‧‧‧Bottom wall

12‧‧‧ Zhoubi

12a‧‧‧The inlet part of the perimeter wall

12b‧‧‧Outlet part of the wall

12c‧‧‧The adjoining part of the inlet of the perimeter wall

12d‧‧‧ Adjacent to the outlet of the perimeter wall

12e‧‧‧Side part of the perimeter wall

12f‧‧‧The inflow side corner of the peripheral wall

12g‧‧‧The corner of the outflow side of the peripheral wall

12i‧‧‧ Inflow side corner of the peripheral wall

12j‧‧‧The inflow side corner of the peripheral wall

13‧‧‧ next door

A1‧‧‧Flow inlet

A2‧‧‧Outlet

Claims (12)

A storage tank having: an inflow port for allowing liquid to flow in; and an outflow port for allowing the liquid to flow out, and a storage tank for storing the liquid flowing in from the inflow port inside; provided with: a peripheral wall, which is opposite to Standing on the bottom surface; and the partition wall standing on the bottom surface; the peripheral wall is provided with: an inlet portion, which forms the inlet; and an outlet portion, which faces the inlet portion and forms the Outflow; the partition wall in this area extends toward the outflow. For example, in the storage tank of claim 1, the partition wall has a height that allows the liquid to overflow from the partition wall. For example, in the storage tank of claim 2, the height of the partition wall becomes higher as it faces the outlet. For a storage tank according to any one of items 1 to 3 of the patent application scope, wherein the outflow port is arranged at a position lower than the inflow port. The storage tank according to any one of items 1 to 4 of the patent application scope, wherein the partition wall is constituted as a part of the outflow port portion of the peripheral wall; the outflow side of the peripheral wall adjacent to the outflow port portion of the peripheral wall is adjacent A part of the inner surface is connected to the top surface of the partition wall of the area and forms the same surface as the top surface of the partition wall of the area. For example, in the storage tank of claim 5, the end edge of the top surface of the partition wall is a curved surface that protrudes toward the inside of the storage tank. A storage tank according to any one of claims 1 to 5, wherein the inflow portion of the peripheral wall is recessed on the outflow side from the inflow side adjacent portion of the peripheral wall adjacent to the inflow portion of the peripheral wall. For example, the storage tank according to any one of the items 1 to 7 of the patent application, in which the partition wall will stand from the position adjacent to the groove. A storage tank as claimed in any one of claims 1 to 8, wherein the outflow portion of the peripheral wall protrudes from the outflow side to the outflow side abutting portion of the peripheral wall adjacent to the outflow portion of the peripheral wall. A storage tank according to any one of claims 1 to 9, wherein the cross-sectional shape of the inner surface of the adjacent portion of the outflow side of the peripheral wall in a plan view is a curved surface formed by a curve protruding toward the outflow side. The storage tank according to any one of items 1 to 10 of the patent application scope includes: a liquid passage area extending between the inflow port and the outflow port; and a liquid retention area, which are respectively disposed in the sandwich The liquid passes through the location on both sides of the area. The storage tank according to any one of the items 1 to 11 of the patent application scope, in which the inner surface of the peripheral wall, the inner surface of the peripheral wall in which a corner portion is formed inside the storage tank in a plan view is viewed in a plan view The outline shape is a curved surface formed by curves.

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