Drainage System

Abstract

To provide a drainage system capable of easily confirming the state of the internal of a vertical pipe of a siphon drain pipe.SOLUTION: A drainage system 10 includes the siphon drain pipe including a horizontal pipe 46 extending in the horizontal direction for drain water from water-area equipment to flow therein and a vertical pipe 48 connected to the downstream side of the horizontal pipe 46 and extending in the vertical direction, and a drop-in part 50 arranged between the horizontal pipe 46 and the vertical pipe 48, a reflection type optical sensor 80 for detecting the state of the internal of the vertical pipe 48 and outputting state detection data, and information means for giving information about the state of the internal of the vertical pipe 48 on the basis of the state detection data.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a drainage system with a siphon drain. [Background technology]

[0002] Conventionally, a drainage system has been proposed in which a pipe condition detection device that detects the condition inside the horizontal pipe of a siphon drain pipe is provided, and the condition of dirt adhering to the inside of the horizontal pipe is detected (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 100891 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, it was thought that dirt was likely to adhere to the horizontal pipe, which is the upstream part of the siphon drain pipe. However, it was found that when a siphon drain pipe is used over a long period of time, dirt tends to accumulate in the vertical pipe rather than in the horizontal pipe.

[0005] In consideration of the above, an object of the present invention is to provide a drainage system that allows the user to easily know the state of the vertical pipe of a siphon drain pipe. [Means for solving the problem]

[0006] The drainage system described in claim 1 comprises a siphon drain pipe extending horizontally and carrying drainage water from plumbing fixtures, a vertical pipe provided downstream of the horizontal pipe and extending vertically, and a drop-off section disposed between the horizontal pipe and the vertical pipe, an internal pipe condition detection device that detects the internal condition of the vertical pipe and outputs condition detection data, and an alarm means that alarms the internal condition of the vertical pipe based on the condition detection data.

[0007] In the drainage system according to claim 1, the pipe condition detection device detects the condition inside the vertical pipe of the siphon drain pipe, and outputs condition detection data corresponding to the condition inside the pipe. The notification means notifies the state inside the vertical pipe of the siphon drain pipe based on the state detection data. This makes it possible to know the condition inside the vertical pipe of the siphon drain pipe without removing the piping.

[0008] The invention described in claim 2 is the drainage system described in claim 1, in which the upright pipe is provided with a light-transmitting section through which light passes, and the pipe internal condition detection device optically detects the internal condition of the upright pipe via the light-transmitting section.

[0009] In the drainage system described in claim 2, the pipe internal condition detection device optically detects the internal condition of the upright pipe through the light transmitting portion and outputs the condition detection data. Note that the upright pipe only needs to have a light transmitting portion in at least a part thereof, and may be entirely made of a material that transmits light.

[0010] The invention described in claim 3 is the drainage system described in claim 2, wherein the pipe condition detection device includes a transmission type optical sensor having a light source that irradiates light toward the light-transmitting portion and a light-receiving element that receives light that has passed through the light-transmitting portion.

[0011] In the drainage system described in claim 3, the condition inside the vertical pipe can be detected by irradiating light from a light source toward the light-transmitting portion, causing the light to transmit through the light-transmitting portion, and receiving the transmitted light with a light-receiving element.

[0012] The invention described in claim 4 is the drainage system described in claim 2, wherein the pipe condition detection device includes a reflective optical sensor that irradiates light from the light-transmitting section toward the inside of the vertical pipe and receives reflected light reflected by the inner surface of the vertical pipe.

[0013] In the drainage system described in claim 4, the reflective optical sensor can detect the condition of the standpipe by irradiating light from the light-transmitting portion toward the inside of the standpipe and receiving the light reflected by the inner surface of the standpipe.

[0014] The invention described in claim 5 is the drainage system described in claim 2, wherein the pipe internal condition detection device includes a camera that photographs the inside of the vertical pipe through the light transmitting portion.

[0015] In the drainage system according to claim 5, the state of the inside of the standpipe can be detected by photographing the inside of the standpipe with a camera through the light transmitting portion. Effect of the Invention

[0016] As described above, the drainage system of the present invention has the excellent effect of making it possible to easily know the condition of the vertical pipe of the siphon drain pipe. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a side view showing the overall configuration of a siphon drainage system according to a first embodiment. [Diagram 2] FIG. [Diagram 3] FIG. 4 is a perspective view, partially in section, showing a recessed portion. [Figure 4] 4 is an enlarged cross-sectional view of a first vertical pipe member showing the periphery of a transmission-type optical sensor. FIG. [Diagram 5] FIG. 4 is a cross-sectional view showing a horizontal pulling tube member to which an electrode is attached. [Figure 6] 4 is a cross-sectional view showing a horizontal pipe member to which a liquid level sensor is attached. FIG. [Figure 7] FIG. 11 is a cross-sectional view showing a first upright pipe member of a siphon drainage system according to a second embodiment. [Figure 8] FIG. 11 is a cross-sectional view showing a first upright pipe member of a siphon drainage system according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] (First embodiment) A siphon drainage system 10 according to a first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 5. Fig. 1 is a schematic diagram showing the overall configuration of the siphon drainage system 10. The siphon drainage system 10 according to this embodiment is a drainage system that efficiently discharges wastewater from a plumbing fixture by utilizing siphon force.

[0019] (Outline of the siphon drainage system) The siphon drainage system 10 of this embodiment is used in an apartment building made up of multiple floors, and is equipped with a drainage standpipe 12 that drains wastewater downward, as shown in Fig. 1. This drainage standpipe 12 extends in the up-down direction (vertical direction) of the apartment building, and penetrates the floor slab 14 of each floor of the apartment building. The drainage standpipe 12 is disposed outside the exterior wall 16 that separates the inside and outside of the dwelling unit, for example, inside a meter box 18. The siphon drainage system of this embodiment is suitable for use in apartment buildings, but can also be used in detached houses, factories, and other buildings other than apartment buildings.

[0020] Each unit on each floor of the apartment building is provided with a plumbing fixture 20. One example of the plumbing fixture 20 is a kitchen sink, with a garbage disposer 22 and a drain trap 24 connected to it downstream in the drain direction. A first L-shaped piping member 26 bent into an L shape is disposed downstream in the drain direction of the drain trap 24. The first L-shaped piping member 26 includes a vertical portion 26A connected to the drain trap 24 and extending vertically, a horizontal portion 26B disposed horizontally on the floor slab 14 and extending horizontally, and a curved portion 26C connecting the vertical portion 26A and the horizontal portion 26B.

[0021] A horizontal pipe member 28 is disposed on the floor slab 14 and extends horizontally, in other words, perpendicular to the vertical direction, on the downstream side of the first L-shaped piping member 26 in the drainage direction. The first L-shaped piping member 26 and the horizontal pipe member 28 are connected via a joint 30.

[0022] A first connection part 60 of an L-shaped drop part 50 described later is connected to the downstream side of the horizontal pull pipe member 28 in the drainage direction via a joint 32. A first upright pipe member 36A, a joint 37, and a second upright pipe member 36B extending in the up-down direction (vertical direction) are arranged on the downstream side of the drop part 50 in the drainage direction. A second connection part 62 of the drop part 50 is connected to the upstream end of the first upright pipe member 36A. The lower end of the drop part 50 is inserted into a through hole 14A formed in the floor slab 14, and the drop part 50 and the first upright pipe member 36A are arranged to penetrate the through hole 14A.

[0023] The first vertical pipe member 36A is made of a synthetic resin having optical transparency. The optical transparency of "light" is not limited to visible light, but also includes light other than visible light, such as infrared light. The first vertical pipe member 36A of the present embodiment is made of a transparent PVC pipe, for example. On the other hand, the second vertical pipe member 36B is formed of an opaque polybutene pipe, for example.

[0024] The downstream end of the second vertical pipe member 36B in the drainage direction is connected to a junction joint 40 attached to the middle part of the drainage vertical pipe 12 via a joint 42.

[0025] In this embodiment, the piping portion that is arranged horizontally on the floor slab 14, specifically, the horizontal portion 26B of the first L-shaped piping member 26 and the horizontal pipe member 28 correspond to the horizontal pipe 46 of the siphon drain pipe 44, and the first vertical pipe member 36A and the second vertical pipe member 36B correspond to the vertical pipe 48 of the siphon drain pipe 44.

[0026] (Configuration of the recessed section) 2, a drop-in portion 50, which is an example of a joint of the present invention, includes a main body pipe portion 52 and a lid 58 as a closing member. The main body pipe portion 52 and the lid 58 of this embodiment are formed of synthetic resin.

[0027] (Main body tube) The main body pipe portion 52 is, for example, made of synthetic resin and is a joint body curved into a substantially L-shape as shown in Figures 2 and 3. The main body pipe portion 52 includes a cylindrical first connection portion 60 extending along the axial direction of the horizontal pipe 46 and a cylindrical second connection portion 62 extending along the axial direction of the vertical pipe 48.

[0028] The main body pipe portion 52 also includes walls 52A, 52B, 52D and a bent portion 52C that connect the downstream end of the first connection portion 60 and the upstream end of the second connection portion 62. The first connection portion 60 and the second connection portion 62, which are disposed on both sides of the bent portion 52C, extend in directions perpendicular to each other.

[0029] A joint 32 is connected to the first connection part 60. The type of joint 32 is not important as long as it can connect the main body pipe part 52 and the horizontal pipe 46, and the joint 32 may be a so-called one-touch joint. The inner diameter of the second connection part 62 is formed to be larger than the inner diameter of the main body pipe part 52, and the upstream end of the upright pipe 48 can be inserted into this second connection part 62.

[0030] In this way, the drop-in section 50 with cleaning port of the siphon drain pipe 44 in this embodiment connects the horizontal pipe 46 and the vertical pipe 48, and functions as a bent pipe that drops the piping extending approximately horizontally (laterally) vertically downward.

[0031] 2, the bent portion 52C has a shape of a curved cylinder cut in half, and forms the inner peripheral surface of the drainage flow path. Step portions 52CA are formed on both sides of the upper end surface of the bent portion 52C when viewed from the center line CL of the main body pipe portion 52. The bent portion 58C of the lid 58 is placed on the step portions 52CA.

[0032] The walls 52A are walls that rise upward from the outer sides of the respective step portions 52CA in the bent portion 52C, and are disposed along the axial direction of the main body pipe portion 52 in a plan view.

[0033] The wall portion 52B is a wall portion that connects one ends (ends on the second connection portion 62 side) of the two wall portions 52A, and is formed in an arc shape in a plan view. Moreover, as shown in Fig. 3, the wall portion 52B rises upward from the second connection portion 62. Note that a flange 62CA is formed at the upper end portion of the second connection portion 62 on which a bent portion 58C (portion integrated with the wall portion 58B) of the lid 58 is placed. The flange 62CA is a portion that protrudes radially inward from the second connection portion 62.

[0034] 2, the wall portion 52D is a wall portion that connects the other ends (ends on the first connection portion 60 side) of the two wall portions 52A, and is formed in a straight line in a plan view. The first connection portion 60 is connected to the wall portion 52D and the end of the bent portion 52C.

[0035] The main body pipe portion 52 is formed in a cylindrical shape from the first connection portion 60 to the second connection portion 62. A cleaning port E is formed above the bent portion 52C, and the flow path is not blocked, but in the present invention, the term "cylindrical" includes a form having such an open cleaning port E.

[0036] (Cleaning port on main body tube) The area surrounded by the walls 52A, 52B, and 52D forms a cleaning port E in the main body pipe portion 52. The cleaning port E is an opening formed to cover the bent portion 52C in a plan view. The cleaning port E is shaped along the axial direction of the main body pipe portion 52 and is generally rectangular.

[0037] The insides of the first connection part 60 and the second connection part 62 are accessible from the cleaning port E. That is, a cleaning tool such as a cleaning nozzle inserted into the inside of the main body pipe part 52 from the cleaning port E can reach the inside of the horizontal pipe 46 (see FIG. 3, etc.) via the first connection part 60. Similarly, a cleaning tool can reach the inside of the vertical pipe 48 (see FIG. 3, etc.) via the second connection part 62.

[0038] (lid) 2, the lid 58 is a closing member that closes the cleaning port E of the main body pipe portion 52 from above. The lid 58 includes walls 58A, 58B, 58D, a bent portion 58C, and a locking portion 58E.

[0039] As shown in Fig. 3, the bent portion 58C has a shape of a curved cylinder cut in half, and forms the inner peripheral surface of the drainage flow path. As shown in Fig. 2, the lower end surface 58CA of the bent portion 58C is placed on the step portion 52CA of the bent portion 52C of the main body pipe portion 52. In this manner, the bent portion 52C of the main body pipe portion 52 and the bent portion 58C of the lid 58 form a drainage flow path having a circular planar cross section. Note that a packing or the like may be placed between the step portion 52CA of the bent portion 52C and the lower end surface 58CA of the bent portion 58C in consideration of water blocking properties.

[0040] The wall portion 58A is a wall portion that rises upward from the lower end surface 5CA of the bent portion 58C, and is arranged along the axial direction of the bent portion 52C when viewed in a plane (and along the axial direction of the main body pipe portion 52 when the lid 58 is assembled to the main body pipe portion 52).

[0041] The wall 58B is a wall that connects one ends of the two walls 58A (ends on the second connection part 62 side of the main body pipe part 52) ​​and is formed in an arc shape in a plan view. In addition, the lower end part of the wall 58B (part integrated with the bent part 58C) is placed on the flange 62CA of the main body pipe part 52 and stands upward from the flange 62CA as shown in Fig. 3.

[0042] As shown in FIG. 2, the wall portion 58D is a wall portion that connects the other ends (the ends of the main body pipe portion 52 on the first connection portion 60 side) of the two wall portions 58A, and is formed linearly in a plan view.

[0043] With the above configuration, a bent portion 58C is formed at the lower end of the area surrounded by the walls 58A, 58B, 58D, and this bent portion 58C is disposed so as to cover the bent portion 52C in the main body pipe portion 52, thereby closing the cleaning port E in the main body pipe portion 52. In addition, the bent portion 58C is shaped along the axial direction of the main body pipe portion 52, and is generally rectangular.

[0044] (Lid locking part and flange) The locking portion 58E is formed over the entire upper end portion of the wall portions 58A, 58B, and 58D. The locking portion 58E includes a protruding portion 58EA protruding outward from the wall portions 58A, 58B, and 58D, and a folded-back portion 58EB folded back downward from the tip of the protruding portion 58EA.

[0045] When the lid 58 is attached to the main body pipe portion 52, the walls 58A, 58B, 58D of the main body pipe portion 52 are sandwiched between the folded portion 58EB of the lid 58 and each of the walls 58A, 58B, 58D.

[0046] Furthermore, when the lid 58 is attached to the main body pipe section 52, a packing S is sandwiched between the protruding section 58EA of the lid 58 and the upper end faces of the walls 58A, 58B, 58D of the main body pipe section 52. The packing S is a gasket (flat packing) made of rubber or silicon. The packing S may also be an O-ring.

[0047] The protruding portion 58EA forms approximately the outer shape of the lid 58 in a plan view. The protruding portion 58EA and the lid 58 are formed larger than the bent portion 58C in a plan view, and are shaped to be approximately rectangular along the axial direction of the main body pipe portion 52. The lid 58 has a shape similar to that of the bent portion 52C of the main body pipe portion 52 in a plan view.

[0048] Flanges 59A, 59B as an example of a fixing portion of the present invention are formed on the folded portion 58EB of the lid 58. The flanges 59A, 59B are formed at positions overlapping with the flanges 54A, 54B of the main body pipe portion in a plan view. Further, a through hole H2 penetrating in the vertical direction is formed in these flanges 59A, 59B.

[0049] With the lid 58 attached to the main body pipe 52, the through holes H2 of the flanges 59A and 59B communicate with the through holes of the flanges 54A and 54B, respectively. Then, the lid 58 is fixed to the main body pipe 52 by screwing the bolt B into the female thread portion H1 of the main body pipe 52.

[0050] (dirt detector) A reflection-type optical sensor 80, which is an example of a pipe internal condition detection device, is attached to the outer surface of the first vertical pipe member 36A. As shown in FIG. 4, the reflection-type optical sensor 80 irradiates light from a light source (not shown) toward the inside of the pipe, and receives light reflected by dirt 82 attached to the inner surface (inner peripheral surface of the pipe) of the first vertical pipe member 36A, i.e., the reflected light, with a light receiving element (not shown). The light receiving element transmits light amount data of the incident light to a notification means 84 provided in the house shown in FIG. 1. The light amount data can be transmitted to the notification means 84, for example, by wire or wirelessly.

[0051] 1, the notification means 84 has a built-in server (computer) 86 that processes light quantity data and the like, and is also provided with a warning lamp 88 that notifies of contamination. In this embodiment, the reflective optical sensor 80 and the server 86 constitute the pipe condition detection device of the present invention.

[0052] 5, a pair of electrodes 90 are attached to the lower side with a gap therebetween on the inner circumferential surface of the horizontal pulling tube member 28. The pair of electrodes 90 are connected to the notification means 84, and a preset voltage can be applied to the pair of electrodes 90.

[0053] The alarm means 84 applies a voltage to a pair of electrodes 90, and if current flows between the electrodes, it determines that wastewater is flowing inside the vertical pipe 48, and if no current flows between the electrodes, it determines that wastewater is not flowing inside the vertical pipe 48.

[0054] (Action, effect) Next, the operation and effects of the siphon drainage system 10 of this embodiment will be described. (1) The notification means 110 applies a voltage to the pair of electrodes 90 during a predetermined time period, for example, once a day, and determines whether or not wastewater w is flowing inside the upright pipe 48.

[0055] (2) If it is determined that wastewater w is flowing inside the vertical pipe 48, the application of voltage is stopped, and the voltage is applied again after a preset time has elapsed, or the voltage is applied continuously, and light is not emitted from the light source of the reflective optical sensor 80 until it is determined that no current flows between the pair of electrodes 90, that is, until it is determined that wastewater w is not flowing inside the vertical pipe 48.

[0056] (3) When it is determined that no current flows between the pair of electrodes 90, the notification means 84 causes the light source of the reflective optical sensor 80 to emit light. Then, the light receiving element of the reflective optical sensor 80 outputs light amount data of the incident reflected light to the notification means 84.

[0057] (4) Here, when there is no dirt 82 attached to the inside of the vertical pipe 48 or when there is only a small amount of dirt 82 attached to the inside of the vertical pipe 48, the amount of reflected light is small, and when the amount of dirt 82 attached to the inside of the vertical pipe 48, in other words, the degree of accumulation, is large, the amount of reflected light is large. For this reason, the notification means 84 inputs data on the amount of reflected light from the light receiving element, and when the amount of reflected light exceeds a preset threshold, it determines that a certain amount of dirt 82 has adhered and accumulated, and turns on or blinks the warning lamp 88. As a result, by looking at the warning lamp 88, the user can easily know whether the inner wall surface of the upright pipe 48 of the siphon drain pipe 44 is dirty or not, without having to visually check the inner wall surface of the pipe.

[0058] It has been found that when the siphon drainage system 10 is used for a long period of time, dirt 82 tends to accumulate more easily on the upstream side of the upright pipe 48 than on the downstream side. For this reason, the reflective optical sensor 80 is preferably provided on the upstream side of the upright pipe 48, and as an example, it is preferably provided within the upper 1 / 3 region when the total length L (see FIG. 1) of the upright pipe 48 is divided into thirds.

[0059] In addition, if the light quantity is measured while the wastewater is flowing, the light quantity may not be stable due to the influence of foreign matter moving in the wastewater. Therefore, in order to avoid the influence of foreign matter moving in the wastewater, it is preferable to measure the light quantity when the wastewater is not flowing, and it is also preferable to measure the light quantity when the wastewater is not in contact with the upright pipe 48.

[0060] (Siphon drain cleaning) 2, in the drop-in section 50 according to the embodiment of the present invention, the cleaning port E is disposed so as to cover the bent section 52C in the main body pipe section 52. This makes it easy to clean both the pipes (the vertical pipe 48 and the horizontal pipe 46 shown in FIG. 3) connected to one end and the other end of the main body pipe section 52.

[0061] As shown in Fig. 2, a light-shielding member 70 can be attached to the transparent lid 58. When visually inspecting the drainage condition in the drainage path, the light-shielding member 70 can be removed. This eliminates the need to remove the lid 58, facilitating visual inspection. Furthermore, by attaching the light-shielding member 70, it is possible to prevent light from entering the piping path, thereby preventing the growth of algae and the like in the piping path.

[0062] In the siphon drainage system 10 of this embodiment, the siphon drainage pipe 44 can be cleaned as follows. When cleaning the inside of the siphon drain pipe 44, drainage from the plumbing fixture 20 is stopped, and as shown in Fig. 2, the lid 58 is removed from the drop-in portion 50 to expose the cleaning port E. By exposing the cleaning port E, dirt 82 inside the pipe can be directly visually observed through the cleaning port E.

[0063] Then, a cleaning nozzle (not shown) of the cleaning machine is inserted into the inside of siphon drain pipe 44 from cleaning port E, and water is sprayed from the cleaning nozzle while moving inside siphon drain pipe 44. This cleans the inside of siphon drain pipe 44 and removes dirt 82.

[0064] In this embodiment, whether or not wastewater w is flowing inside the vertical pipe 48 is detected by whether or not a current flows between the electrodes 90. However, as shown in FIG. 6, an ultrasonic level sensor 92 can be provided on the upper part of the horizontal pipe member 28 and ultrasonic waves can be transmitted directly downward to detect the presence or absence of wastewater w.

[0065] In this embodiment, by looking at the warning lamp 88, it is possible to know whether or not the inner wall surface of the vertical pipe 48 is dirty. If the inner wall surface of the pipe is dirty, a message indicating that the inner wall surface of the pipe is dirty may be displayed on an LCD display panel or the like, or a buzzer or the like may be sounded.

[0066] In this embodiment, the notification means 84 has a built-in server 86 for processing light intensity data, but the light intensity data may be transmitted to an external server 94 (see FIG. 1) installed outside the home, for example, in an apartment management office, a management company for a house or apartment, a maintenance company that performs maintenance on a house, or a drainage system cleaning company, and the light intensity data may be processed by the external server 94. In this case, the notification means 84 in the home is provided with a transmitter 97 and a receiver 98 for transmitting and receiving data.

[0067] In this way, by transmitting the light intensity data and the like to the external server 94 and processing it there, the server 86 is not required for the in-home notification means 84, and the notification means 84 can be simplified. Also, since the amount of light intensity data transmitted from the house is very small, it is possible to utilize other communication methods, such as LPWA (Low Power Wide Area: a communication method that realizes long-distance communication while reducing power consumption), as a communication method for remote monitoring without using a high-speed communication line such as an LET line.

[0068] When the external server 94 detects dirt, it may send a signal to the notification means 84 in the house to turn on the warning lamp 88. The notification means 84 does not have to be provided in the house. For example, the external server 94 may be connected to a terminal or the like provided outside the house, and a message indicating that the inner wall surface is dirty may be displayed on the screen of the terminal.

[0069] The light amount data does not have to be checked constantly, and may be checked, for example, once a day to once a week. By checking the change in dirt over time, it is possible to calculate the accumulation of dirt. This makes it possible to know in advance the day (for example, the day when cleaning will be performed) when the amount of dirt (accumulation level) will reach a threshold value, for example, before the amount of dirt (accumulation level) exceeds the threshold value.

[0070] Therefore, if the light intensity data is transmitted to the external server 94, even if the resident does not notice the dirt notification, the state of dirt can be understood by businesses, such as the management office of the apartment building, the management company for the house or apartment building, the maintenance company that maintains the house, the drainage equipment cleaning company, etc. Therefore, the resident will not miss the time for cleaning.

[0071] Furthermore, in the siphon drainage system 10 of this embodiment, cleaning can be carried out only after a notification is given, eliminating the need for periodic visual inspection, which can significantly reduce the burden on residents and contractors.

[0072] Second embodiment Next, a siphon drainage system 10 according to a second embodiment of the present invention will be described with reference to Fig. 7. The same components as those in the above-described embodiment are given the same reference numerals, and the description thereof will be omitted.

[0073] In this embodiment, a transmission type optical sensor 95 is provided in the first vertical pipe member 36A instead of the reflection type optical sensor 80. The transmission type optical sensor 95 is connected to a notification means 84 (not shown in FIG. 7), and as an example, a light source 95A is attached to one radial side of the first vertical pipe member 36A, and a light receiving element 95B is attached to the opposite side to the light source 95A across the center line of the first vertical pipe member 36A.

[0074] In this embodiment, light emitted from the light source 95A passes through the center line of the first vertical pipe member 36A and enters the light receiving element 95B.

[0075] Here, when there is no dirt 82 or only a small amount of dirt 82 attached to the inner surface of the first vertical tube member 36A, the amount of light received by the light receiving element 95B is large, and when the amount of dirt 82 is large, the amount of light received by the light receiving element 95B is small.

[0076] For this reason, the notification means 84 inputs light amount data from the light receiving element 95B, and when the light amount is equal to or less than a preset threshold, it determines that a certain amount of dirt has adhered and accumulated, and turns on or blinks the warning lamp 88. This allows the user to easily know whether the inner wall surface of the pipe of the drop-in portion 50 is dirty or not by looking at the warning lamp 88 while in the house.

[0077] (Third embodiment) Next, a siphon drainage system 10 according to a third embodiment of the present invention will be described with reference to Fig. 8. The same components as those in the above-described embodiment are given the same reference numerals, and the description thereof will be omitted.

[0078] As shown in Fig. 8, in the siphon drainage system 10 of this embodiment, instead of the reflection type optical sensor 80, a camera 96 ​​including an imaging element such as a CCD, a lens system, and lighting (lamp) is provided outside the first upright pipe member 36A. In this embodiment, the optical axis of the camera 96 ​​is set at a right angle to the center line of the first upright pipe member 36A. The lighting may be provided outside the first upright pipe member 36A at a position different from the installation position of the camera 96.

[0079] In this embodiment, the state of the first upright pipe member 36A is photographed by the camera 96, and the amount (degree of accumulation) of the dirt 82 can be detected by image processing or the like.

[0080] [Other embodiments] Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modified forms without departing from the spirit and scope of the present invention.

[0081] The light emitted from the light source in the optical sensor is not limited to visible light, and may be light other than visible light, such as infrared light. When the light emitted from the light source is infrared light, the first upright tube member 36A does not need to be transparent in appearance as long as the infrared light can easily pass through it. In other words, when the first upright tube member 36A is made of a resin material or the like that easily transmits infrared light, a transparent resin material does not need to be used. Also, the portion that transmits infrared light may be made thin so that the infrared light can easily pass through.

[0082] In the above embodiment, an alert was issued when the amount of reflected light or transmitted light corresponding to the amount of dirt (degree of accumulation) exceeded a preset threshold (or fell below a preset threshold). However, for example, light intensity may be measured at a predetermined time interval, and an alert may be issued when there is a sudden change in the amount of light, regardless of the threshold. [Explanation of symbols]

[0083] 10...Siphon drainage system, 20...Water-related equipment, 36A...First vertical pipe member (light-transmitting part), 50...Drop-in part, 44...Siphon drainage pipe, 46...Horizontal pipe, 48...Vertical pipe, 80...Reflective optical sensor (internal pipe condition detection device), 84...Notification means, 86...Server (internal pipe condition detection device), 95...Transmissive optical sensor (internal pipe condition detection device), 95A...Light source, 95B...Light receiving element, 96...Camera (internal pipe condition detection device)

Claims

1. A siphon drain pipe including a horizontal pipe extending horizontally and draining water from a water-related fixture, a vertical pipe provided downstream of the horizontal pipe and extending vertically, and a drop-in portion disposed between the horizontal pipe and the vertical pipe; A pipe internal condition detection device that detects the internal condition of the vertical pipe and outputs condition detection data; a notification means for notifying an internal state of the vertical pipe based on the state detection data; having The drop-in portion is a drainage system having a main pipe portion curved into an approximately L shape and having a cleaning port, and a closing member that closes the cleaning port from above.

2. The vertical pipe is provided with a light transmitting portion through which light passes, The pipe internal condition detection device optically detects the internal condition of the vertical pipe through the light transmitting portion.

2. The drainage system of claim 1.

3. The pipe internal condition detection device is configured to include a transmission type optical sensor having a light source that irradiates light toward the light transmitting portion and a light receiving element that receives light that has transmitted through the light transmitting portion.

3. The drainage system of claim 2.

4. The pipe internal condition detection device includes a reflective optical sensor that irradiates light from the light transmitting portion toward the inside of the vertical pipe and receives light reflected by the inner surface of the vertical pipe.

3. The drainage system of claim 2.

5. The pipe internal condition detection device is configured to include a camera that captures an image of the inside of the vertical pipe through the light transmitting portion.

3. The drainage system of claim 2.

6. A drainage system as described in claim 1, wherein a bent portion in the main pipe portion and a bent portion in the blocking member form a drainage flow path having a circular flat cross-section.

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