TWI727319B - Storage tank (two) - Google Patents

Abstract

The present invention provides a new storage tank that allows a lot of liquid to flow out quickly and smoothly.

The storage tank of the present invention has an inflow port through which liquid can flow in, and an outflow port through which liquid can flow out, and the liquid flowing in from the inflow port can be stored inside. The storage tank has a peripheral wall that rises relative to the bottom surface. The peripheral wall has an inflow port portion formed with an inflow port, and an outflow port portion opposite to the inflow port portion and formed with an outflow port. The outflow port portion of the peripheral wall protrudes more to the outflow side than the outflow side adjacent portion of the peripheral wall adjacent to the outflow port portion of the peripheral wall.

Description

Storage tank (2)

The present invention relates to a storage tank.

As a drainage system for residential complexes, there is a system called a siphon drainage system using the principle of siphoning. According to the siphon drainage system, when the drainage from the water machine is performed, the drainage can be promoted by the siphon force generated by the siphon drainage pipe. On the other hand, if a large amount of liquid is drained in a siphon drainage system at a time, it must be installed upstream of the siphon drain pipe that can temporarily store the liquid until it starts to promote drainage (generating siphon force). Storage tank. The above-mentioned general storage tank has a flow path narrowing part provided between the outlet of the storage tank and the storage tank body, and a part of the flow path narrowing part is provided with a storage tank that bulges to the outer inner wall surface (see For example, Patent Document 1.).

[Prior Technical Literature]

[Patent Literature]

Patent Document 1: JP 2016-108749 A

According to the above-mentioned storage tank, the liquid staying in the vicinity of the outflow port is guided along the inner wall surface of the reduced portion of the flow path to a direction away from the outflow port. Thereby, according to the above-mentioned storage tank, the flow of the liquid is not obstructed near the outflow port, and a lot of liquid can be flowed out quickly and smoothly.

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

The purpose of the present invention is to provide a new type of storage tank capable of allowing a lot of liquid to flow out quickly and smoothly.

The storage tank related to the present invention is an invention that focuses on collecting the liquid in the vicinity of the outflow port, and allows a large amount of liquid to flow out quickly and smoothly.

The storage tank related to the present invention has an inflow port that allows liquid to flow in, and an outflow port that allows the liquid to flow out, and stores the liquid flowing in from the inflow port in the inside; it has a peripheral wall that rises relative to the bottom surface; The peripheral wall has an inflow port portion formed with the inflow port, and an outflow port portion opposite to the inflow port portion and formed with the outflow port; the outflow port portion of the surrounding wall is larger than the outflow port in the surrounding wall The adjoining part of the outflow side of the peripheral wall that is partly adjacent to it is more protruding to the outflow side.

According to the storage tank related to the present invention, the structure can easily collect the liquid near the outflow port. Therefore, according to the storage tank related to the present invention, a lot of liquid can flow out quickly and smoothly.

Preferably, in the storage tank related to the present invention, the cross-sectional shape of the inner surface of the adjoining portion on the outflow side of the peripheral wall when viewed from the side is a curved surface formed by a convex curve toward the outflow side.

In this case, the liquid in the storage tank can be caused to generate up-down (longitudinal) convection (circulation flow), and at the same time, it can further flow out along the inner surface of the adjacent portion on the outflow side of the peripheral wall.

Preferably, in the storage tank related to the present invention, the cross-sectional shape of the inner surface of the outlet portion of the peripheral wall viewed from the liquid flow direction is a race track shape.

In this case, the liquid can be more easily collected near the outflow port.

Preferably, in the storage tank related to the present invention, the inner surface of the outlet portion of the peripheral wall includes a curved surface whose front end becomes narrower toward the outlet.

In this case, the liquid can be more easily collected near the outflow port.

Preferably, in the storage tank related to the present invention, the inflow port portion of the peripheral wall is more recessed to the outflow side than 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 outflow direction of the liquid. As a result, water can be drained more quickly and smoothly.

Preferably, the storage tank related to the present invention has a liquid passage area extending between the inflow port and the outflow port, and the liquid retention area is arranged at respective positions on both sides of the liquid passage area. area.

In this case, it is possible to allow the liquid to flow to the liquid passage area while allowing the remaining liquid to stay in the liquid stagnation area. Therefore, the flow of the liquid is not easily obstructed near the outflow port, so that the drainage can be performed more quickly and smoothly.

According to the present invention, it is possible to provide a new storage tank capable of allowing a lot of liquid to flow out quickly and smoothly.

1A‧‧‧Storage tank

A1‧‧‧Inlet

P1‧‧‧Inlet

A2‧‧‧Outlet

P2‧‧‧Outflow tract

1c‧‧‧Vent

11‧‧‧Bottom wall

11a‧‧‧The lower part of the bottom wall

11fa‧‧‧The inner surface of the lower part of the bottom wall

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

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

11b‧‧‧Upper part of bottom wall

11fb‧‧‧The inner surface of the upper part of the bottom wall

12‧‧‧ Zhoubi

12a‧‧‧Entrance part of the wall

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

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

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

12b‧‧‧Outlet part of the wall

12fb‧‧‧The inner surface of the outflow part of the peripheral wall

12fb1‧‧‧The deepest inner surface of the outlet part of the peripheral wall

12fb2‧‧‧The inner side surface of the outlet part of the peripheral wall

12c‧‧‧The adjacent part of the inlet of the wall

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

12d‧‧‧The adjacent part of the outflow port of the peripheral wall

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

12e‧‧‧Side part of the wall

12fe‧‧‧The inner surface of the side part of the peripheral wall

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

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

12i‧‧‧The corner of the inflow side of the wall

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

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

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

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

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

13‧‧‧ next door

13f1‧‧‧Area next to the side

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

13e‧‧‧The end edge of the top surface of the adjacent wall

R1‧‧‧Liquid passing area

G‧‧‧Gobe

F1‧‧‧The bottom surface of the liquid passing area

R2‧‧‧Liquid retention area

F2‧‧‧The bottom of the liquid retention area

100‧‧‧Drainage system

101‧‧‧Floor components

102‧‧‧Floor

110‧‧‧Water Utensils

120‧‧‧Appliance drain

120a‧‧‧Upstream part of the appliance drain pipe

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

121‧‧‧Drain trap

130‧‧‧Siphon drain

130a‧‧‧Transverse pipe of siphon drainage pipe

130b‧‧‧The vertical pipe of the siphon drainage pipe

140‧‧‧Pipe joint

150‧‧‧Riser

S‧‧‧Space under floor

Fig. 1 is a perspective view showing the inflow side of the storage tank related 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 plan 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.

Fig. 7 is a sectional view taken along line A-A in Fig. 3;

Fig. 8 is a B-B sectional view of Fig. 3.

Fig. 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.

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

Fig. 12 is a cross-sectional view taken along line D-D in Fig. 5;

Fig. 13 is a cross-sectional view of E-E in Fig. 5.

Fig. 14 is a perspective view showing the F-F cross 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 sectional view of Fig. 5;

Fig. 17 is a cross-sectional view taken along line H-H of Fig. 5;

FIG. 18 is a schematic system diagram showing an example of the drainage system of the storage tank in which the present invention can be applied in partial section.

Hereinafter, referring to the drawings, the storage tank related to an embodiment of the present invention will be described in detail.

[Applicable to the drainage system of the storage tank related to the present invention]

FIG. 18 is a schematic system diagram showing an example of the drainage system of the storage tank in which the present invention can be applied in partial section. In FIG. 18, symbol 100 is an example of a drainage system of a storage tank applicable 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 the drainage from the water machine is performed, the drainage can be promoted by the siphon force generated by the siphon drainage pipe. The siphon drainage system is adopted as, for example, a drainage system for a multi-storey housing complex that divides a building into multiple floors.

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

The water appliance 110 is arranged on each floor of the building. Examples of the water appliance 110 include a bathtub (for example, an integrated bathroom), a washbasin, a countertop, and the like. In this example, the water appliance 110 is a bathtub.

The appliance drainage pipe 120 is connected to the water appliance 110 and the storage tank 1. In this example, the appliance drain pipe 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 assembly 101 and the floor 102 of the building. Furthermore, in this example, the appliance drain pipe 120 is composed of an upstream portion 120a extending in the longitudinal direction and a downstream 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 inclines downward as it goes from the upstream side portion 120a to the downstream. The downstream portion 120b is connected to the storage tank 1. In addition, in this example, a drain trap 121 is interposed in the middle of the downstream portion 120b.

The siphon drainage pipe 130 is connected to the storage tank 1 and the stand pipe 150. The riser 150 is a drain pipe that penetrates each floor of the building in the up and down direction. In this example, the siphon drainage pipe 130 is composed of a horizontal pipe 130a arranged in the under-floor space S and a vertical pipe 130b penetrating the floor 102 and hanging downward. The transverse pipe 130a is connected to the storage tank 1. In this example, the transverse tube 130a is almost horizontal and extends in the transverse direction without inclination. In detail, it is piped without inclination along the floor 102 of the floor where the water appliance 110 is installed, and it is nearly horizontal. The vertical pipe 130b is connected to the transverse pipe 130a. The stand pipe 130 b is connected to the stand pipe 150 through a pipe joint 140. In detail, the vertical pipe 130b extends slightly below the horizontal pipe 130a to form a hanging part to allow the siphon force (for example, negative pressure) to be generated.

In the drainage system 100 of this example, first, the height difference H1 between the outlet of the water appliance 110 and the horizontal pipe 130a of the siphon drain pipe 130 is used to allow the liquid to flow out of the water appliance 110. The liquid (for example, water) flowing out from the water appliance 110 flows into the storage tank 1 from the appliance drain pipe 120 due to its own weight (falling pressure). The storage tank 1 stores a part of the liquid inside while allowing the remaining liquid to flow out to the siphon drain pipe 130.

In this example, the siphon drainage pipe 130 will form a siphon drainage path that can generate the attractive force caused by the siphon force. In the siphon drainage path, the siphon force generated in the siphon drainage pipe 130 can promote the discharge of liquid from the siphon drainage pipe 130.

In the siphon drainage path of this example, the downward pressure of the drainage from the water appliance 110 caused by the height difference H1 between the outlet of the water appliance 110 and the horizontal pipe 130a of the siphon drainage pipe 130 makes the appliance drainage pipe 120 and The horizontal pipe 130a of the siphon drainage pipe 130 is filled with water. By filling the horizontal pipe 130a of the siphon drainage pipe 130 with water, the water that reaches the vertical pipe 130b (sag length H2) of the siphon drainage pipe 130 will be in the vertical pipe 130b. It starts to fall, and the siphon effect occurs when the horizontal pipe 130a of the siphon drain pipe 130 becomes full of water. With the siphon effect as the drainage power, the high-speed flow generated in the siphon drainage path is used to drain the water from the water appliance 110, and the drain will be smoothly and quickly discharged into the pipe joint 140.

In this example, since a siphon drainage system is used as the drainage system 100, it will become a full-flow drainage in which the inside of the drainage pipe is filled with water. In this way, if a siphon drainage system is used as the drainage system 100, since liquid drainage will become full-flow drainage, it is possible to prevent solids from adhering to the pipe, and a small-diameter pipe can be used. Furthermore, in this example, since a siphon drainage system is used as the drainage system 100, the drainage pipe can be arranged without inclination. In this way, if a siphon drainage system is used as the drainage system 100, the drainage pipes can be arranged without inclination, and thereby, the height of the space under the floor where the drainage pipes are arranged can be lowered. Moreover, 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 standpipe 150 (for example, from the outlet of the water appliance 110 to the siphon drainage system) can be increased. The horizontal length L) of the vertical pipe 130b of the pipe 130 (see 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 a time, and the storage tank 1 related to an embodiment of the present invention is set in the appliance drainage pipe 120 and the siphon drainage pipe 130 between. The storage tank 1 can temporarily store a large amount of water drained from the water appliance 110 at one time until it starts to promote drainage (generating a siphon force).

[Storage tank related to an embodiment of the present invention]

Fig. 1 is a perspective view showing the inflow side of the storage tank 1A related 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 through which the liquid can flow in and an outflow port A2 through which the liquid can flow out, and the liquid flowing in from the inflow port A1 can be stored inside.

Fig. 3 shows a front view of the storage tank 1A from the inflow side. In addition, FIG. 4 shows a rear view of 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 up with respect to the bottom surface, and two partition walls 13 standing up with respect to 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 divided by the bottom wall 11, the peripheral wall 12, and the top wall 14 is formed inside the storage tank 1A. In addition, in this embodiment, the peripheral wall 12 is formed with a vent H12. The air vent H12 allows the internal space of the storage tank 1A to open to the outside. This prevents the inside of the storage tank 1A from becoming negative pressure.

Fig. 5 is a plan view showing the storage tank 1A from above. Fig. 6 shows a bottom view of the storage tank 1A from below. As shown in FIG. 6, in the storage tank 1A, the peripheral wall 12 has an inflow port portion 12a formed with an inflow port A1, and an outflow port portion 12b opposite to the inflow port portion 12a and formed with an outflow port A2. In this embodiment, the peripheral wall 12 has 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 the side portion 12e. Furthermore, in this embodiment, the peripheral wall 12 has an inflow side corner portion 12f connecting the inflow side adjacent portion 12c and the side portion 12e, and an outflow side corner portion 12g connecting 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 partitioned by the peripheral wall 12 in the same manner as the bottom wall 11. In addition, in this embodiment, the top wall 14 has two openings A3. The opening A3 allows the internal space of the storage tank 1A to open to the outside. Moreover, in this embodiment, the peripheral wall 12 is on the top wall 14 side, and there are recessed portions 12h at respective positions of the inflow-side corner portion 12f and the outflow-side corner portion 12g.

Fig. 7 is a sectional view taken along line A-A in Fig. 3; Fig. 7 is the largest section of the storage tank 1A. Fig. 8 is a B-B sectional view of Fig. 3. Fig. 8 is a cross section through the center Oa of the inflow port A1. Fig. 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 has a liquid passage region R1 extending between the inflow port A1 and the outflow port A2, and liquid retention regions R2 arranged at respective positions on both sides of the liquid passage region R1. . In the storage tank 1A, the liquid passage region R1 connects the inflow port A1 and the outflow port A2, and guides the liquid flowing in from the inflow port A1 to the outflow port A2. The liquid passing area R1 may extend in a curved shape or a serpentine shape in a plan view. In this embodiment, the liquid passing area R1 extends linearly as shown in Figs. 7-9. Thereby, the liquid passage region R1 becomes the shortest path as a liquid passage path 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 respective positions on both sides of the liquid passage region R1 and are adjacent to the liquid passage region R1. The two liquid retention regions R2 can respectively retain the liquid flowing in from the inflow port A1.

In addition, as shown in FIG. 7 and the like, in the storage tank 1A, the inflow port portion 12a of the peripheral wall 12 is more recessed to the outflow side than the inflow side abutting portion 12c adjacent to the inflow port 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 port 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 more to the outflow side than the outflow-side adjacent portion 12d. In this embodiment, as shown in FIG. 7 and the like, the outflow side adjacent portion 12d of the peripheral wall 12 is connected to the outflow port portion 12b.

Fig. 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 positioned lower than the peripheral wall 12 except for the inflow port portion 12a and the outflow port portion 12b of the peripheral wall 12. The outflow port A2 is also located below the peripheral wall 12 except for the inflow port portion 12a and the outflow port portion 12b of the peripheral wall 12 in the same manner as the inflow port A1.

Fig. 12 is a cross-sectional view taken along line D-D in Fig. 5; Fig. 12 is a cross-section that divides the storage tank 1A into two equal parts. FIG. 12 shows the internal structure of the liquid passing area R1 and the liquid retention area R2 in the inside of the storage tank 1A. Fig. 13 is a cross-sectional view of E-E in 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 passage P1 formed in the inflow port portion 12a of the peripheral wall 12. As shown in FIG. In addition, the outflow port A2 is constituted by the outflow passage P2 formed in the outflow port portion 12b of the peripheral wall 12. In the storage tank 1A, the liquid passing 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 side portion 11a of the bottom wall 11 among the bottom wall 11, and the flow of the peripheral wall 12 The inner surface 12fb of the outlet portion 12b is formed. In the storage tank 1A, as shown in FIG. 12, the bottom surface F1 of the liquid passing region R1 is formed of a flat surface. In this embodiment, the bottom surface F1 of the liquid passage region R1 is defined by the inner surface 12fa of the inflow port portion 12a of the peripheral wall 12 from the lowest end of the inner surface 12fa (extends to the lowermost side in the liquid flow direction of the inflow port portion 12a). The lowermost end of the inner surface 11fa of the inner surface 11fa of the lower side portion 11a of the bottom wall 11 (extending the lowermost end of the liquid flow direction of the lower portion 11a) 12fa1, and the peripheral wall The lowermost end of the inner surface 12fb of the inner surface 12fb of the outflow port portion 12b of 12 (the extension end extending at the lowermost side in the liquid flow direction of the outflow port portion 12b) is formed by the lowermost end 12fb1.

In addition, in FIG. 12, the symbol 12fp1 is the lowermost end of the inflow channel P1 (the extended end that extends on the lowermost side in the liquid flow direction of the inflow channel P1). In addition, the symbol 12fp2 is the lowermost end of the outflow channel P2 formed at the outflow port portion 12b (the extended end that extends on the lowermost side in the liquid flow direction of the outflow channel P2). As shown in Fig. 12, etc., in the storage tank 1A, the lowermost end (bottom surface) 11fa1 of the lower side portion 11a of the bottom wall 11 is inclined downward toward the downstream, and the outflow port A2 is provided at a position lower than the inflow port A1. .

On the other hand, as shown in FIG. 7 and the like, the two liquid retention areas R2 are respectively defined 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 area R1 when viewed from above. Zoning. In detail, the two liquid retention regions R2 are defined 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 side when viewed in plan. The inner surface 12ff of the corner portion 12f, the inner surface 12fe of the side 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 passage area R1 are divided. In addition, the two liquid retention regions R2 are shown in FIG. 13 and the like, and are respectively defined by the inner surface (bottom surface) 11fb of the upper side portion 11b of the bottom wall 11 among the bottom wall 11, and the inner surface (top surface) of the top wall 14 ) Constructed by 14f. In addition, in the storage tank 1A, as shown in FIG. 13, the bottom surface F2 of the liquid retention region R2 is composed of a flat surface. In this embodiment, the bottom surface F2 of the liquid retention region R2 is formed 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 cross section of a plane 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 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 composed of the deepest surface 11fa1 and 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. Viewed from the extending direction of the liquid passage region R1, the deepest surface 11fa1 is connected to the side surface 11fa2 by a curved surface formed by a curve. Viewed from the extending direction of the liquid passage region R1, the side surface 11fa2 is connected to the inner surface 11fb of the upper portion 11b by a curved surface formed by a curve.

In addition, in the storage tank 1A, a part of the groove 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 lower than the outflow-side adjacent portion 12d. As shown in FIG. 14, in this embodiment, the inner surface 12fb of the outlet 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 to the side surface 12fb2 by a curved surface formed by a curve. The side surface 12fb2 and the side surface 11fa2 of the lower portion 11a of the bottom wall 11 form the same plane. The deepest surface 12fb1 is the deepest surface (lowest end) among the inner surfaces 12fb of the outflow port portion 12b of the peripheral wall 12. The deepest surface 12fb1 and the deepest surface 11fa1 of the lower portion 11a of the bottom wall 11 constitute the same plane. In addition, 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 and the inner surface 13f1 of the partition wall 13 form the same plane.

Furthermore, as shown in FIG. 8 etc., in the storage tank 1A, a part of the groove G is formed by the inner surface 11fa of the inflow port 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 so that the inflow port A1 will be lower than the inflow side adjacent portion 12c. As shown in FIG. 8, in this 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 to the side surface 12fa2 by a curved surface formed by a curved line. The side surface 12fa2 and the side surface 11fa2 of the lower portion 11a of the bottom wall 11 form the same plane. As shown in FIG. 12 etc., the deepest surface 12fa1 is the deepest surface (lowest end) among the inner surfaces 12fa of the inflow port portion 12a of the peripheral wall 12. The deepest surface 12fa1 and the deepest surface 11fa1 of the lower portion 11a of the bottom wall 11 constitute the same plane. Moreover, as shown in FIG. 8 etc., the deepest surface 12fa1 is connected to the inner surface 12fi of the inflow-side corner part 12i through the side surface 12fa2.

As shown in Fig. 9 and the like, the two partition walls 13 extend toward the outflow port A2. In the storage tank 1A, it is ensured that the outlet port A2 extends toward the outlet port A2. Here, "ensure the outlet A2" means "the opening of the outlet A2 is not closed".

In addition, 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 the height from the bottom surface F1 of the liquid passing region R1. Thereby, the liquid passing through the liquid passing area R1 can flow to the liquid retention area R2 when the head of the liquid is higher than a certain height.

In addition, as shown in FIG. 12 and the like, in the storage tank 1A, the height H13 of the partition wall 13 increases 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 as viewed from the side is a curved surface formed by a curve that protrudes toward the outflow side. As shown in FIG. 12, in this embodiment, the curve of the top surface 13f2 of the partition wall 13 is formed by the radius of curvature R13.

In the storage tank 1A, the partition wall 13 is configured as a part of the outflow port portion 12 b of the peripheral wall 12. The partition wall 13 is erected 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 cross section is a cross section of a plane including the boundary between the peripheral wall 12 and the bottom wall 11. As shown in FIG. 15 and so on, 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 among the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12, and is the same as the side surface 12fb2. flat. In addition, in the storage tank 1A, the inner surface 12fd of the outflow-side abutting portion 12d of the peripheral wall 12 adjacent to the outflow port portion 12b of the peripheral wall 12 is connected to the top surface 13f2 of the partition wall 13 and is connected to the top surface 13f2 of the partition wall 13 The top surface 13f2 is formed into the same surface. Here, "same surface" refers to "smoothly connected continuous surfaces", and also includes either "plane" or "curved surface".

Fig. 16 is a G-G sectional view of Fig. 5; As shown in FIG. 16, in the storage tank 1A, the edge portion 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 addition, as shown in FIG. 13, in the storage tank 1A, the inner surface 12fd of the outflow-side abutting portion 12d of the peripheral wall 12 has a cross-sectional shape viewed from the side as a curved surface formed by a curve protruding toward the outflow side. As shown in Fig. 13, in this embodiment, the inner surface 13fd of the outflow-side abutting portion 13d is constituted by 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 wall 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.

After painstaking experiments and research, the inventor of this case 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, a large amount of liquid can flow out quickly and smoothly. Therefore, the time until the siphon force is generated can be shortened. The storage tank 1A related to the present embodiment is an invention that focuses on the situation when the liquid head near the outflow port A2 is rapidly increased, so that a large amount of liquid can flow out quickly and smoothly.

As shown in FIG. 12 and so on, the storage tank 1A related to this embodiment 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. Storage tank inside. The storage tank 1A has a peripheral wall 12 standing up with respect to the bottom surface, and two partition walls 13 standing up with respect to the bottom surface. The peripheral wall 12 has an inflow port portion 12a formed with an inflow port A1, and an inflow port portion 12a. The outflow port part 12b which opposes and is formed with outflow port A2. The two partition walls 13 extend toward the outflow port A2. According to the storage tank 1A related to this embodiment, the partition wall 13 is provided to ensure the flow of the liquid toward the outflow port A2 as indicated by the arrow D1, and at the same time rapidly increase the liquid head near the outflow port A2. Therefore, according to the storage tank 1A related to this embodiment, a lot of liquid can flow out quickly and smoothly. In particular, as in this embodiment, if the storage tank 1A is used in a siphon drainage system, even if 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, if the liquid head in the vicinity of the outflow port A2 is higher than a certain height, the liquid in the vicinity of the outflow port A2 can be caused to flow out from the partition wall 13 as shown by the arrow D2 in FIG. 15 and the like. Therefore, according to the present embodiment, the flow of the liquid is not easily obstructed near the outflow port A2, so that drainage can be performed more quickly and smoothly.

In addition, as shown in FIG. 12, in this embodiment, the height H13 of the partition wall 13 increases toward the outflow port A2. In this case, since the water head of the liquid near the outflow port A2 can be increased, the amount of liquid flowing out of the partition wall 13 is increased as it moves away from the outflow port A2. Therefore, according to this embodiment, it is possible to achieve a balance between shortening the time until the siphon force is generated and smooth drainage (simultaneously established).

Moreover, as shown in FIG. 12, in this embodiment, the outflow port A2 is provided at a position lower than the inflow port 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.

In addition, as shown in FIG. 15 and the like, in this embodiment, the partition wall 13 is formed as a part of the outflow port portion 12b of the peripheral wall 12, and the outflow side of the peripheral wall 12 adjacent to the outflow port portion 12b of the peripheral wall 12 is adjacent The inner surface 12fd of the portion 12d is connected to the top surface 13f2 of the partition wall 13 and formed 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 caused to further flow out along the inner surface 12fd of the outflow-side adjacent portion 12d of the peripheral wall 12. Therefore, according to the present embodiment, the flow of the liquid is not easily obstructed near the outflow port A2, so that more rapid and smooth drainage can be performed.

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

In addition, 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 when 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 in the storage tank (liquid flowing out of the partition wall 13 in this embodiment) can be caused to generate convection (circular flow) in the vertical direction (vertical direction) while moving along The inner surface 12fd of the adjoining portion 12d on the outflow side of the peripheral wall 12 further flows out. Therefore, according to this embodiment, more rapid and smooth drainage can be performed.

In particular, as shown in FIG. 7 and the like, the storage tank 1A related to this embodiment has a liquid passage area R1 extending between the inflow port A1 and the outflow port A2, and two sides of the liquid passage area R1 sandwiching the liquid passage area R1. The liquid retention area R2 arranged at the location. In this case, as indicated by the arrows D1 and D2, the liquid can be caused to flow to the liquid passing region R1, and the remaining liquid can be retained in the liquid stagnation region R2 at the same time. Therefore, according to the present embodiment, it is possible to prevent the length of the extending direction of the liquid passing region R1 from becoming longer, and at the same time to store more liquid in the liquid retention region R2. Therefore, with the storage tank 1A, the flow of the liquid is not easily obstructed near the outflow port A2, so that more liquid can be discharged quickly and smoothly. Furthermore, in this case, the liquid flowing out from the liquid passage region R1 can be caused to convection (circulate flow) 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 prevent the length of the extending direction of the liquid passing region R1 from becoming longer, and at the same time to discharge more liquid quickly and smoothly. Moreover, in this case, since the liquid flowing out from the liquid passing area R1 will convection between the liquid passing area R1 and the liquid stagnation area R2, it is difficult for dirt to adhere to the inside of the storage tank 1A. As a result, the number of operations required for cleaning the storage tank 1A can be reduced.

In addition, according to the present embodiment, since the liquid retention area R2 is arranged at respective positions on both sides of the liquid passage area R1, in order to ensure the volume of the liquid retention area R2, for example, the liquid retention area should be enlarged. The size (area) in the extending direction of R2 is sufficient, and there is no need to increase the height of the liquid retention area R2, or even the height of the storage tank 1A. Therefore, as in the present embodiment, for example, on both sides of the liquid passage area R1 sandwiching the liquid retention area R2, the extension direction of the liquid retention area R2 is horizontal, and the erection direction of the peripheral wall 12 becomes the vertical direction. If the storage tank 1A is provided on the floor 102 or the like, it is not necessary to ensure the height of the under-floor space S to be large, and a large amount of liquid can be discharged quickly and smoothly. 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) in the erection 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 1/2 of the width of the storage tank 1A. Hereinafter, the height of the storage tank 1A is more preferably less than 1/3 of the width of the storage tank 1A. Here, "the width of the storage tank 1" refers to two of the peripheral walls 12 of the storage tank 1A facing each other in a direction orthogonal to the height direction of the storage tank 1A and the extending direction of the liquid passage region R1 The maximum width between the 12 perimeter walls. That is, referring to FIG. 7, it is the width (dimension) between the outer surfaces of the two peripheral walls (side walls) 12e in the storage tank 1A arranged in the vertical direction of the drawing.

Furthermore, as shown in FIG. 7 and the like, in the storage tank 1A, the inflow port portion 12a of the peripheral wall 12 is more recessed to the outflow side than the inflow side adjacent portion 12c of the peripheral wall 12 adjacent to the inflow port portion 12a. In this case, the liquid flowing in the storage tank 1A will easily return to the outflow direction of the liquid. As a result, water can be drained more quickly and smoothly. Especially in this embodiment, since the liquid retention area R2 is arranged adjacent to the liquid passing area R1, the liquid flowing from the liquid passing area R1 can easily return to the liquid passing area R1. That is, in the present embodiment, it can be made to efficiently convection between the liquid passing region R1 and the liquid retention region R2. Therefore, according to this embodiment, a large amount of liquid can be discharged more quickly and smoothly through the liquid passing area R1. In addition, in this embodiment, dirt becomes less likely to adhere to the inside of the storage tank 1A. Thereby, the number of operations required for cleaning the storage tank 1A can be further reduced.

Moreover, as shown in FIG. 15 etc., the partition wall 13 is erected from the position adjacent to the groove part G. As shown in FIG. In this embodiment, the groove G is arranged in the liquid passing region R1. In this case, even a small amount of liquid can be quickly collected by the groove G. As a result, drainage can be performed more quickly and smoothly. In the present embodiment, the partition wall 13 is erected from a position adjacent to the groove G in the liquid passage region R1. 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, a large amount of liquid can be discharged more quickly and smoothly through the liquid passing area R1. Particularly in this case, since the partition wall 13 is erected from a position adjacent to the groove G in the liquid passage region R1, the liquid head in the vicinity of the outflow port A2 can be raised more quickly. Therefore, according to this embodiment, a large amount of liquid can be discharged more quickly and smoothly through the liquid passing area R1.

7 and so on, in the storage tank 1A, among the inner surface 12f of the peripheral wall 12, a corner portion is formed in the storage tank 1A when viewed from above. The inner surface 12f of the peripheral wall 12 is the contour viewed from the top. The shape is a curved surface formed by a curve. 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 drawn from The contour shapes viewed from the top are curved surfaces formed by curves. In this case, the liquid flowing from the liquid passage region R1 can be more efficiently convective between the liquid passage region R1 and the liquid retention region R2. Therefore, according to this embodiment, a large amount of liquid can be discharged more smoothly, and the number of operations required for cleaning the storage tank 1A can be further reduced.

However, the inventors of the present case have found through painstaking experiments and studies that in the storage tank used in the siphon drainage system, even if the liquid is collected near the outlet of the storage tank, a large amount of liquid can still flow out quickly and smoothly. It can even shorten the time until the siphon force is generated. The storage tank 1A related to the present embodiment is an invention that focuses on the situation where the liquid is collected near the outflow port A2 and allows 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 more to the outflow side than 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 becomes a structure that easily collects the liquid in the vicinity of the outflow port A2. Therefore, according to this embodiment, a large amount of liquid can flow out quickly and smoothly. In particular, as in this embodiment, if the storage tank 1A is used in 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 cross-sectional view taken along line H-H of Fig. 5; The H-H cross section is a cross section of a plane including the upper end of the outflow-side adjacent portion 12d of the peripheral wall 12. 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 from the liquid flow direction is a racing track shape. In this case, it becomes easier to collect the liquid in the vicinity of the outflow port A2. In this embodiment, the shape of the racing track is a flat shape extending in the lateral direction (horizontal direction). Exemplary racing track shapes include a racing track shape with a single-sided single-centered circle with a center O1 arranged on one side, a single-sided double-centered circle with a center O1 and a center O2 arranged on one side, A single-sided three-centered racetrack shape with three centers O1, center O2, and center O3 arranged on one side. Furthermore, an example of the shape of a racetrack with a single-sided three-centered circle has three centers O1~O3 aligned with one-sided three-centered circles, and one of the two centers O1 and the center O3 are arranged on the outside. The shape of a racetrack with a sharp three-centered circle on one side at the center O2, and a racetrack shape with a blunt three-centered circle with a center O2 between the center O1 and the center O3 arranged on the inner side. In this embodiment, the cross-sectional shape of the outflow port A2 is similar to the shape of a racing track with a sharp three-centered 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 the line between A and B is a straight line. Also, the other sections are curved lines.

In addition, from the viewpoint of easy collection of liquid, it is most preferable that the cross-sectional shape of the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12 as viewed from the liquid flow direction is a racing track shape. On the other hand, the cross-sectional shape of the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12 as viewed from the liquid flow direction may be a circle or an ellipse. When the inner surface 12fb of the outlet portion 12b of the peripheral wall 12 is circular or elliptical when viewed from the liquid flow direction, it is easy to allow a large flow of liquid to flow. However, the circular and elliptical cross-sectional shapes are the cross-sectional shapes for special cases of large flow. Therefore, as in the present embodiment, if it is desired to make the liquid flow continuously, it is particularly preferable to have a racetrack shape as illustrated in FIG. 17 and the like.

Furthermore, in the storage tank 1A, as shown in FIG. 7 and the like, the inner surface 12fb of the outflow port portion 12b of the peripheral wall 12 includes a curved surface whose tip becomes narrower toward the outflow port A2. In this case, it becomes easier to collect the liquid in the vicinity of the outflow port A2.

However, as shown in FIG. 16, in the storage tank 1A, as viewed from the extending direction of the liquid passage region R1, the bottom surface F2 of the liquid retention region R2 is inclined downward toward the liquid passage region R1, and is connected to the liquid passage region R1 The plane of the bottom surface F1. In this case, the liquid in the liquid stagnation region R2 flows through the bottom surface F2 of the liquid stagnation region R2 and easily flows into the liquid passage region R1. Therefore, according to this embodiment, a large amount of liquid can be discharged more smoothly through the liquid passing area R1. In this embodiment, the bottom surface F2 of the liquid retention area R2 is expressed by an angle with respect to the horizontal axis (in FIG. 16, it is represented by a straight line Oy that appears when the horizontal plane is viewed from the extending direction of the liquid passage area R1). θ11b is inclined. The angle θ11b can be appropriately set according to the content and size of the storage tank 1. The angle θ11b may be, for example, an angle of 0.5° to 5°. If the angle θ11b is less than 0.5°, the effect of convection to form drainage will be weak. In addition, if the angle θ11b is 5° or more, it becomes too inclined. Therefore, if the liquid does not completely enter the outflow port A2 and overflows, the overflowed liquid cannot flow smoothly to the liquid retention area R2.

However, 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 ends of the bottom surfaces F2 of the two liquid retention regions R2 are connected, the liquid passage region R1 can be a V-shaped groove with the connection portion of the two bottom surfaces F2 as the bottom of the groove. Alternatively, if the lower ends of the bottom surface F2 of the two liquid retention regions R2 are connected through a plane, the liquid passage region R1 can also be a trapezoidal V-shaped groove with the plane as the bottom of the groove. The bottom surfaces F1 of the liquid passage regions R1 are all located at the same height as the bottom surfaces 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, a large amount of liquid can be collected in the liquid passing area R1. Therefore, according to this embodiment, a large amount of liquid can be discharged more smoothly through the liquid passing area R1. In this 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 and so on, in this embodiment, at least the inner surface 12f of the peripheral wall 12 in the liquid retention region R2 has a cross-sectional shape viewed from the extending direction of the peripheral wall 12 from the inside of the storage tank 1A. A curved surface formed by a convex curve. In this case, the liquid flowing from the liquid passage region R1 generates a vertical (longitudinal) convection (circulating flow), and at the same time, it further flows out along the inner surface 12fd of the outflow-side adjacent portion 12d of the peripheral wall 12. Therefore, according to the present embodiment, the convection between the liquid passing area R1 and the liquid retention area R2 can be performed more efficiently. Therefore, according to this embodiment, a large amount of liquid can be discharged more smoothly, and the number of operations required for cleaning the storage tank 1A can be further reduced.

Moreover, in this embodiment, as shown in FIGS. 3 and 4, viewed from the direction of liquid flow (viewed from the extending direction of the liquid passage region R1), the liquid passage region R1 is arranged as an outflow port A2 converging flow At least a part of the entrance A1 overlaps on a straight line.

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

(1) Viewed from the extending direction of the liquid passage region R1, the center Oa of the inflow port A1 and the center Ob of the outflow port 1b are arranged on the same vertical line Oz.

(2) Adjust the size of the inner diameter of the inflow port A1 (the size of the radius ra of the inflow port A1) and the size of the inner diameter of the outflow port A2 (the size of the radius rb of the outflow port A2).

(3) Adjust the distance ΔZ between the center Oa of the inflow port A1 and the center Ob of the outflow port A2 in the vertical direction (direction of the vertical straight line Oz).

In this 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 from the extending direction of the liquid passage area R. In particular, as shown in FIG. 3, in this embodiment, in (2), the size of the inner diameter of the outflow port A2 is set to be smaller than the size of the inner diameter of the inflow port A1. Thereby, the amount of liquid flowing out from the outflow port A2 becomes smaller than the amount of liquid flowing in from the outflow port A1. In addition, 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 adjusted in the vertical direction to allow the upper end of the opening of the outflow port A2 to meet It overlaps the lower end of the opening of the inflow port A1.

The above items are used to illustrate the exemplary implementation of the present invention, and various changes can be made without departing from the scope of the patent application. For example, the storage tank 1 may be integrally manufactured by injection molding by resin. In particular, the storage tank 1A can be molded by blow molding. However, the manufacturing method of the storage tank 1 is not limited to injection molding. It does not matter whether the storage tank 1 has a top wall 14 formed on the upper end of the peripheral wall 12. 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 a drain pipe in which the upstream part (horizontal pipe) and the downstream part (vertical pipe) are integrated, the upstream part (horizontal pipe) ) And the downstream part (vertical pipe) are separate drain pipes, and these drain pipes are connected to each other to serve as the appliance drain pipe 120 or the siphon drain pipe 130.

1A‧‧‧Storage tank

11‧‧‧Bottom wall

11a‧‧‧The lower part of the bottom wall

11b‧‧‧Upper part of bottom wall

12‧‧‧ Zhoubi

12a‧‧‧Entrance part of the wall

12b‧‧‧Outlet part of the wall

12c‧‧‧The adjacent part of the inlet of the wall

12d‧‧‧The adjacent part of the outflow port of the peripheral wall

12e‧‧‧Side part of the wall

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

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

12i‧‧‧The corner of the inflow side of the wall

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

13‧‧‧ next door

A1‧‧‧Inlet

A2‧‧‧Outlet

Claims (5)

A storage tank has an inflow port that allows liquid to flow in, and an outflow port that allows the liquid to flow out, and stores the liquid flowing in from the inflow port in the inside; it has a peripheral wall that rises relative to the bottom surface; the peripheral wall It has an inflow port portion formed with the inflow port, and an outflow port portion opposite to the inflow port portion and formed with the outflow port; the outflow port portion of the peripheral wall is relatively different from the outflow port portion of the peripheral wall The adjoining portion on the outflow side of the adjacent peripheral wall is more protruding to the outflow side; the inflow port portion of the peripheral wall is more recessed to the outflow than the inflow side adjacent portion of the peripheral wall adjacent to the inflow port portion of the peripheral wall side. For example, in the storage tank of item 1 of the scope of patent application, the cross-sectional shape of the inner surface of the adjoining portion of the outflow side of the peripheral wall when viewed from the side is a curved surface formed by a convex curve toward the outflow side. For example, in the storage tank of item 1 or 2 of the scope of patent application, the cross-sectional shape of the inner surface of the outlet portion of the peripheral wall viewed from the liquid flow direction is a race track shape. For example, the storage tank of item 1 or 2 of the scope of patent application, wherein the inner surface of the outlet portion of the peripheral wall includes a curved surface whose front end becomes narrower toward the outlet. For example, the storage tank of item 1 or 2 of the scope of patent application has a liquid passage area extending between the inflow port and the outflow port, and liquid arranged at respective positions on both sides of the liquid passage area in which the liquid passage area is sandwiched. Stranded area.

Images