Indoor water supply and drainage system

By introducing an anti-clogging mechanism into the indoor water supply and drainage system, and utilizing the combination of turbines, rotating rods, and spiral blades, the problem of food waste clogging is solved, achieving efficient wastewater discharge and waste pulverization, thus improving the system's practicality.

CN224063587UActive Publication Date: 2026-03-31NINGBO ZHONGDING ARCHITECTURAL DESIGN & RES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-21
Publication Date
2026-03-31

AI Technical Summary

Technical Problem

The existing indoor water supply and drainage system is not effective at preventing blockages, which leads to pipe blockages and reduces wastewater discharge efficiency.

Method used

The design incorporates an anti-clogging mechanism, including a turbine, a rotating rod, spiral blades, and a pulverizing motor. The turbine drives the rotating rod and spiral blades to rotate, quickly clearing kitchen waste. The pulverizing motor drives the connecting shaft and worm gear to rotate, thus pulverizing and discharging the kitchen waste.

Benefits of technology

This effectively avoids pipe blockage caused by kitchen waste, improves wastewater discharge efficiency, and enhances the practicality of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an indoor water supply and drainage system, which belongs to the technical field of indoor water supply and drainage equipment, and comprises a water storage tank, a water inlet valve, a water supply pipe, a water distribution pipe, a toilet water pipe, a kitchen water pipe, a domestic water pipe, a toilet water drainage pipe, a first connecting branch pipe, a kitchen water drainage pipe, an anti-blocking mechanism, a domestic water drainage pipe, a filtering mechanism and a water drainage pipe, the device is novel in design and ingenious in device, by arranging an anti-blocking mechanism, when a turbine rotates, a rotating rod is driven to rotate, when the rotating rod rotates, a spiral blade is driven to rotate, and under rotation of the spiral blade, the spiral blade is driven to rotate; the kitchen garbage in the second connecting branch pipe and the anti-blocking pipe can be quickly discharged into the cleaning box, and the crushed kitchen garbage can be quickly discharged, so that the phenomenon of blockage possibly caused by the kitchen garbage is avoided, the wastewater discharging efficiency is further improved, and the practicability of the device is greatly improved.
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Description

Technical Field

[0001] This application relates to the field of indoor water supply and drainage equipment technology, and more particularly to an indoor water supply and drainage system. Background Technology

[0002] The published patent with authorization announcement number CN212248484U discloses an indoor water supply and drainage system, including a water storage tank, an inlet valve, a water supply pipe, a branch pipe, a toilet water pipe, a kitchen water pipe, a domestic water pipe, a toilet drain pipe, a first connecting branch pipe, a kitchen drain pipe, an anti-clogging component, a domestic drain pipe, a filter component, and a sewer pipe. A water supply pipe is inserted into the top face of one side of the water storage tank, and a branch pipe is inserted into the bottom face of the other side of the water storage tank. One end of the branch pipe is connected to the toilet water pipe, the kitchen water pipe, and the domestic water pipe, respectively. A toilet drain pipe, a kitchen drain pipe, and a domestic drain pipe are respectively installed on the outside of the toilet water pipe, the kitchen water pipe, and the domestic water pipe. This indoor water supply and drainage system has a simple structure, supplies water according to different water needs, and collects and centrally cleans the generated wastewater according to different situations. This not only avoids pipe blockage but also effectively reduces water consumption.

[0003] The indoor water supply and drainage system in the aforementioned patent has poor anti-clogging effect and cannot efficiently transport kitchen waste in the pipes, thus causing pipe congestion and slowing down the wastewater discharge efficiency.

[0004] Therefore, this application proposes an indoor water supply and drainage system. Utility Model Content

[0005] This application proposes an indoor water supply and drainage system to solve the problems mentioned in the background art. By setting an anti-clogging mechanism, when the turbine rotates, it will drive the rotating rod to rotate. When the rotating rod rotates, it will drive the spiral blade to rotate. Under the rotation of the spiral blade, the kitchen waste in the second connecting branch pipe and the anti-clogging pipe can be quickly discharged into the cleaning box, and the crushed kitchen waste can be quickly discharged, thereby avoiding the phenomenon that kitchen waste may cause congestion, thus improving the wastewater discharge efficiency and greatly enhancing the practicality of the device.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] An indoor water supply and drainage system includes a water storage tank, an inlet valve, a water supply pipe, a branch pipe, a toilet water pipe, a kitchen water pipe, a domestic water pipe, a toilet drain pipe, a first connecting branch pipe, a kitchen drain pipe, an anti-clogging mechanism, a domestic drain pipe, a filter mechanism, and a sewer pipe. One end of the domestic drain pipe is connected to and installed with a filter mechanism, and one side of the kitchen drain pipe is connected to and installed with an anti-clogging mechanism. The anti-clogging mechanism includes a cleaning box, a second connecting branch pipe, an anti-clogging pipe, a pulverizing motor, a connecting shaft, pulverizing blades, a worm gear, a turbine, a rotating rod, and spiral blades.

[0008] In a preferred embodiment, a worm gear is fixedly connected between every two connecting shafts, a turbine is provided between the two worm gears, and the two worm gears and the turbine are meshed together.

[0009] Rotation is achieved by one of the worm gears, which meshes with the turbine to cause the other worm gear to rotate, thereby driving the rotation of the other two connecting shafts connected to it, thus improving the practicality of the device.

[0010] In a preferred embodiment, a plurality of shredding blades are provided on the outside of each connecting shaft and inside the cleaning box. A shredding motor is fixedly connected to the outside of the cleaning box, and the output end of the shredding motor is fixedly connected to one end of one of the connecting shafts.

[0011] The crushing motor drives one of the connecting shafts to rotate. When the connecting shaft rotates, it drives one of the worm gears connected to it to rotate, thereby improving the practicality of the device.

[0012] In a preferred embodiment, a second connecting branch pipe and an anti-clogging pipe are fixedly connected to the cleaning box, and the second connecting branch pipe is connected to the kitchen drain pipe, while the anti-clogging pipe is connected to the drain pipe.

[0013] The device improves its practicality by discharging crushed kitchen waste and wastewater into the sewer pipe through an anti-clogging pipe, while domestic wastewater generated during use is discharged into the domestic drainage pipe through the domestic water pipe.

[0014] In a preferred embodiment, a rotating rod is fixedly connected inside the turbine, and the top and bottom ends of the rotating rod extend into the second connecting branch pipe and the anti-clogging pipe, respectively. Multiple helical blades are provided outside the rotating rod and inside the second connecting branch pipe and the anti-clogging pipe.

[0015] The device crushes kitchen waste by rotating multiple connecting shafts, which in turn drive the shredding blades. Simultaneously, the rotation of the turbine drives the rotating rod, which in turn drives the spiral blades. The rotation of the spiral blades facilitates the rapid discharge of kitchen waste from the second connecting branch pipe and the anti-clogging pipe into the cleaning box, and also ensures the shredded kitchen waste is quickly discharged. This prevents potential blockages caused by kitchen waste, thereby improving wastewater discharge efficiency and enhancing the practicality of the device.

[0016] In a preferred embodiment, a water supply pipe is inserted and installed on the top end face of one side of the water storage tank, and a water distribution pipe is inserted and installed on the bottom end face of the other side of the water storage tank. One end of the water distribution pipe is respectively connected to a toilet water pipe, a kitchen water pipe, and a domestic water pipe. A toilet drain pipe, a kitchen drain pipe, and a domestic drain pipe are respectively provided on the outside of the toilet water pipe, the kitchen water pipe, and the domestic water pipe. A first connecting branch pipe is connected and installed on one end face of the toilet drain pipe, and a drain pipe is connected and installed at the bottom of the first connecting branch pipe. A water inlet valve is connected and installed on one end of the water supply pipe, and one end of the water supply pipe passes through the water inlet valve and connects to an external water pipe. One end of the drain pipe is connected to an external sewage pipe.

[0017] By opening the inlet valve, external water is injected into the water storage tank through the water supply pipe. According to usage needs, the water in the storage tank flows into the toilet water pipe, kitchen water pipe, and domestic water pipe through the branch pipe, thus supplying water as needed. Wastewater generated by the toilet water pipe is discharged into the toilet drain pipe, and then transported to the sewer pipe through the first connecting branch pipe. Kitchen waste and wastewater generated by the kitchen water pipe are discharged into the kitchen drain pipe, thereby improving the practicality of the device.

[0018] In a preferred embodiment, the filtration mechanism includes a filter box, a third connecting branch pipe, a filter pipe, and a filter screen. The top end of the third connecting branch pipe is connected to a domestic drain pipe, and the bottom end of the third connecting branch pipe is connected to and installed with a filter box. A filter screen is installed inside the filter box, and the other end of the drain pipe passes through the filter box and is located on top of the filter screen.

[0019] The system recycles and reuses domestic wastewater through a filtration mechanism. The wastewater flows into the filter box through a third connecting branch pipe and is filtered through a filter screen, thereby improving the practicality of the device.

[0020] In a preferred embodiment, a filter tube is inserted and installed inside the filter box at the bottom of the filter screen, and one end of the filter tube passes through the filter box and is connected to the toilet water pipe.

[0021] The filtered wastewater is injected into the toilet water pipe through the filter pipe, thus supplying water for use. This achieves wastewater recycling and conservation, avoiding direct discharge of wastewater into the sewage pipe and effectively reducing water consumption. Unfiltered wastewater is injected into the drain pipe and then discharged into the external sewage pipe, thereby improving the practicality of the device.

[0022] The beneficial effects of this application are:

[0023] 1. This indoor water supply and drainage system, by setting an anti-clogging mechanism, when the turbine rotates, it will drive the rotating rod to rotate, and when the rotating rod rotates, it will drive the spiral blade to rotate. Under the rotation of the spiral blade, the kitchen waste in the second connecting branch pipe and the anti-clogging pipe can be quickly discharged into the cleaning box, and the crushed kitchen waste can be quickly discharged, thereby avoiding the phenomenon that kitchen waste may cause congestion, thereby improving the wastewater discharge efficiency and greatly enhancing the practicality of the device;

[0024] 2. This indoor water supply and drainage system, by setting an anti-clogging mechanism, operates a pulverizing motor, which drives one of the connecting shafts to rotate. When the connecting shaft rotates, it drives one of the worm gears connected to it to rotate. The worm gear meshes with the turbine, causing another worm gear to rotate, thereby driving the other two connecting shafts connected to it to rotate. Through the rotation of multiple connecting shafts, the pulverizing blades are driven to rotate, thus crushing kitchen waste, greatly improving the practicality of the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the device in this application;

[0026] Figure 2 This is a front view of the anti-clogging mechanism of the device in this application;

[0027] Figure 3 This is a top view of the anti-clogging mechanism of the device in this application;

[0028] Figure 4 This is a schematic diagram of the filtration mechanism of the device in this application.

[0029] Numbered in the diagram: 1. Water tank; 2. Inlet valve; 3. Water supply pipe; 4. Branch pipe; 5. Toilet water pipe; 6. Kitchen water pipe; 7. Domestic water pipe; 8. Toilet drain pipe; 9. First connecting branch pipe; 10. Kitchen drain pipe; 11. Anti-clogging mechanism; 111. Cleaning box; 112. Second connecting branch pipe; 113. Anti-clogging pipe; 114. Crushing motor; 115. Connecting shaft; 116. Crushing blade; 117. Worm gear; 118. Turbine; 119. Rotating rod; 120. Spiral blade; 12. Domestic drain pipe; 13. Filtration mechanism; 131. Filter box; 132. Third connecting branch pipe; 133. Filter pipe; 134. Filter screen; 14. Drain pipe. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] Reference Figure 1-4 An indoor water supply and drainage system includes a water storage tank 1, an inlet valve 2, a water supply pipe 3, a branch pipe 4, a toilet water pipe 5, a kitchen water pipe 6, a domestic water pipe 7, a toilet drain pipe 8, a first connecting branch pipe 9, a kitchen drain pipe 10, an anti-clogging mechanism 11, a domestic drain pipe 12, a filter mechanism 13, and a drain pipe 14. One end of the domestic drain pipe 12 is connected to and installed with the filter mechanism 13. One side of the kitchen drain pipe 10 is connected to and installed with the anti-clogging mechanism 11. The anti-clogging mechanism 11 includes a cleaning box 111, a second connecting branch pipe 112, an anti-clogging pipe 113, a pulverizing motor 114, a connecting shaft 115, a pulverizing blade 116, a worm gear 117, a turbine 118, a rotating rod 119, and a spiral blade 120.

[0032] Reference Figure 1-3 A worm gear 117 is fixedly connected between every two connecting shafts 115, and a turbine 118 is provided between the two worm gears 117, with the two worm gears 117 and the turbine 118 meshing together. Rotation is achieved by one of the worm gears 117, and the meshing of the worm gear 117 and the turbine 118 causes the other worm gear 117 to rotate, thereby driving the other two connecting shafts 115 connected to it to rotate, thus improving the practicality of the device.

[0033] Reference Figure 1-3Multiple shredding blades 116 are arranged outside each connecting shaft 115 and inside the cleaning box 111. A shredding motor 114 is fixedly connected to the outside of the cleaning box 111, and the output end of the shredding motor 114 is fixedly connected to one end of one of the connecting shafts 115. When the shredding motor 114 works, it drives one of the connecting shafts 115 to rotate. When the connecting shaft 115 rotates, it drives one of the worm gears 117 connected to it to rotate, thereby improving the practicality of the device.

[0034] Reference Figure 1-3 The cleaning box 111 is fixedly connected to a second connecting branch pipe 112 and an anti-clogging pipe 113. The second connecting branch pipe 112 is connected to the kitchen drain pipe 10, and the anti-clogging pipe 113 is connected to the drain pipe 14. The crushed kitchen waste and wastewater are discharged into the drain pipe 14 through the anti-clogging pipe 113, and the domestic wastewater generated during use is discharged into the domestic drain pipe 12 through the domestic water pipe 7, thereby improving the practicality of the device.

[0035] Reference Figure 1-3 The turbine 118 is internally connected to a rotating rod 119, with the top and bottom ends of the rotating rod 119 extending into the second connecting branch pipe 112 and the anti-clogging pipe 113, respectively. Multiple spiral blades 120 are installed outside the rotating rod 119 and inside the second connecting branch pipe 112 and the anti-clogging pipe 113. The rotation of multiple connecting shafts 115 drives the pulverizing blades 116 to rotate, thus crushing the kitchen waste. At the same time, when the turbine 118 rotates, it drives the rotating rod 119 to rotate, and when the rotating rod 119 rotates, it drives the spiral blades 120 to rotate. Under the rotation of the spiral blades 120, the kitchen waste in the second connecting branch pipe 112 and the anti-clogging pipe 113 can be quickly discharged into the cleaning box 111, and the crushed kitchen waste can be quickly discharged, thereby avoiding the phenomenon of kitchen waste causing congestion, improving the wastewater discharge efficiency, and thus improving the practicality of the device.

[0036] Reference Figure 1 , 4A water supply pipe 3 is inserted and installed on the top end of one side of the water storage tank 1, and a branch pipe 4 is inserted and installed on the bottom end of the other side of the water storage tank 1. One end of the branch pipe 4 is connected to a toilet water pipe 5, a kitchen water pipe 6, and a domestic water pipe 7. A toilet drain pipe 8, a kitchen drain pipe 10, and a domestic drain pipe 12 are respectively installed on the outside of the toilet water pipe 5, the kitchen water pipe 6, and the domestic water pipe 7. A first connecting branch pipe 9 is connected and installed on one side of the toilet drain pipe 8, and a drain pipe 14 is connected and installed at the bottom of the first connecting branch pipe 9. A water inlet valve 2 is connected and installed on one end of the water supply pipe 3, and one end of the water supply pipe 3 passes through the water inlet valve 2 and connects to the external water pipe. Then, one end of the drain pipe 14 is connected to the external sewage pipe; by opening the inlet valve 2, the external water source is injected into the water storage tank 1 through the water supply pipe 3. According to the usage needs, the water in the water storage tank 1 flows into the toilet water pipe 5, the kitchen water pipe 6 and the domestic water pipe 7 through the water distribution pipe 4, so as to supply and use. The wastewater generated by the use of the toilet water pipe 5 is discharged into the toilet drain pipe 8, and then transported to the drain pipe 14 through the first connecting branch pipe 9 through the toilet drain pipe 8. The kitchen waste and wastewater generated by the use of the kitchen water pipe 6 are discharged into the kitchen drain pipe 10, thereby improving the practicality of the device.

[0037] Reference Figure 1 , 4 The filtration mechanism 13 includes a filter box 131, a third connecting branch pipe 132, a filter pipe 133, and a filter screen 134. The top end of the third connecting branch pipe 132 is connected to the domestic drain pipe 12, and the bottom end of the third connecting branch pipe 132 is connected to and installed with the filter box 131. The filter screen 134 is installed inside the filter box 131, and the other end of the drain pipe 14 passes through the filter box 131 and is located on top of the filter screen 134. The filtration mechanism 13 can recycle and reuse domestic wastewater. Domestic wastewater flows into the interior of the filter box 131 through the third connecting branch pipe 132 and is filtered by the filter screen 134, thereby improving the practicality of the device.

[0038] Reference Figure 1 , 4 A filter tube 133 is inserted and installed inside the filter box 131 at the bottom of the filter screen 134, and one end of the filter tube 133 passes through the filter box 131 and is connected to the toilet water pipe 5. The filtered wastewater is injected into the toilet water pipe 5 through the filter tube 133, and then supplied for use through the toilet water pipe 5. This realizes the recycling and reuse of domestic wastewater, saving water and avoiding the direct discharge of domestic wastewater into the sewage pipe, effectively reducing water consumption. Unfiltered wastewater is injected into the drain pipe 14 and then discharged into the external sewage pipe through the drain pipe 14, thereby improving the practicality of the device.

[0039] Working principle: By opening the inlet valve 2, external water is injected into the water storage tank 1 through the water supply pipe 3. According to usage needs, the water inside the storage tank 1 flows through the distribution pipe 4 into the toilet water pipe 5, kitchen water pipe 6, and domestic water pipe 7, thus supplying water as needed. Wastewater generated during use is discharged into the toilet drain pipe 8 via the toilet water pipe 5, and then transported to the sewer pipe 14 via the first connecting branch pipe 9. Kitchen waste and wastewater generated during use are discharged into the kitchen drain pipe 10 via the kitchen water pipe 6, and then discharged through the anti-clogging mechanism 11. The food waste and wastewater are discharged into the cleaning tank 111 through the second connecting branch pipe 112. The crushing motor 114 operates, driving one of the connecting shafts 115 to rotate. When the connecting shaft 115 rotates, it drives one of the connected worm gears 117 to rotate. The worm gear 117 meshes with the turbine 118, causing the other worm gear 117 to rotate, thereby driving the other two connected shafts 115 to rotate. The rotation of multiple connecting shafts 115 drives the crushing blades 116 to rotate, crushing the food waste. At the same time, when the turbine 118 rotates, ... This will drive the rotating rod 119 to rotate. When the rotating rod 119 rotates, it will drive the spiral blade 120 to rotate. Under the rotation of the spiral blade 120, the kitchen waste in the second connecting branch pipe 112 and the anti-clogging pipe 113 can be quickly discharged into the cleaning box 111, and the crushed kitchen waste can be quickly discharged, thereby avoiding the phenomenon that kitchen waste may cause congestion, and thus improving the wastewater discharge efficiency. The crushed kitchen waste and wastewater are discharged into the interior of the drain pipe 14 through the anti-clogging pipe 113, and the domestic wastewater generated by the use is supplied to the domestic drainage pipe 12 through the domestic water pipe 7. The system recycles and reuses domestic wastewater through the filtration mechanism 13. The domestic wastewater flows into the filter box 131 through the third connecting branch pipe 132. The domestic wastewater is filtered through the filter screen 134. The filtered wastewater is then injected into the toilet water pipe 5 through the filter pipe 133, thus supplying water for use. This system realizes the recycling and reuse of domestic wastewater, saving water and avoiding direct discharge of domestic wastewater into the sewage pipe, effectively reducing water consumption. Unfiltered wastewater is injected into the drain pipe 14 and then discharged into the external sewage pipe through the drain pipe 14.

[0040] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and the inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. An indoor water supply and drainage system comprising a water storage tank (1), a water inlet valve (2), a water supply pipe (3), a water distribution pipe (4), a toilet water pipe (5), a kitchen water pipe (6), a domestic water pipe (7), a toilet drainage pipe (8), a first connection branch pipe (9), a kitchen drainage pipe (10), an anti-clogging mechanism (11), a domestic drainage pipe (12), a filtering mechanism (13), and a sewer pipe (14), characterized in that, The one end of the life drain pipe (12) is connected with the filtering mechanism (13), one side end face of the kitchen drain pipe (10) is connected with the anti-blocking mechanism (11), the anti-blocking mechanism (11) comprises a cleaning box (111), a second connecting branch pipe (112), an anti-blocking pipe (113), a crushing motor (114), a connecting shaft (115), a crushing blade (116), a worm (117), a turbine (118), a rotating rod (119) and a spiral blade (120).

2. The indoor water supply and drainage system according to claim 1, characterized in that, The worm (117) is fixedly connected between every two connecting shafts (115), the turbine (118) is arranged between two worms (117), and the two worms (117) and the turbine (118) are in meshing connection.

3. The indoor water supply and drainage system according to claim 1, characterized in that, A plurality of crushing blades (116) are arranged outside the connecting shaft (115) and inside the cleaning box (111), the cleaning box (111) is fixedly connected with the crushing motor (114), and one end of the output end of the crushing motor (114) is fixedly connected with one connecting shaft (115).

4. The indoor water supply and drainage system according to claim 1, characterized in that, The second connecting branch pipe (112) and the anti-blocking pipe (113) are fixedly connected to the cleaning box (111), the second connecting branch pipe (112) is communicated with the kitchen drain pipe (10), and the anti-blocking pipe (113) is communicated with the sewer pipe (14).

5. The indoor water supply and drainage system according to claim 1, wherein The rotating rod (119) is fixedly connected inside the turbine (118), the top end and the bottom end of the rotating rod (119) extend into the second connecting branch pipe (112) and the anti-blocking pipe (113) respectively, and a plurality of spiral blades (120) are arranged outside the rotating rod (119) and inside the second connecting branch pipe (112) and the anti-blocking pipe (113).

6. The indoor water supply and drainage system according to claim 1, characterized in that, The water supply pipe (3) is insertedly connected to the top end face of one side of the water storage tank (1), the water distribution pipe (4) is insertedly connected to the bottom end face of the other side of the water storage tank (1), one end of the water distribution pipe (4) is connected with the toilet water pipe (5), the kitchen water pipe (6) and the life water pipe (7) respectively, the outside of the toilet water pipe (5), the kitchen water pipe (6) and the life water pipe (7) is respectively provided with the toilet drain pipe (8), the kitchen drain pipe (10) and the life drain pipe (12), the first connecting branch pipe (9) is connected to the end face of one side of the toilet drain pipe (8), the bottom of the first connecting branch pipe (9) is connected with the sewer pipe (14), one end of the water supply pipe (3) is connected with the water inlet valve (2), one end of the water supply pipe (3) penetrates through the water inlet valve (2) and is connected with the external water pipe, and one end of the sewer pipe (14) is connected with the external sewage pipeline.

7. The indoor water supply and drainage system according to claim 1, characterized in that, The filter mechanism (13) comprises a filter box (131), a third connecting branch pipe (132), a filter pipe (133) and a filter screen (134), one end of the top of the third connecting branch pipe (132) is connected with the domestic drainage pipe (12), one end of the bottom of the third connecting branch pipe (132) is connected with the filter box (131), the inside of the filter box (131) is provided with the filter screen (134), the other end of the sewer pipe (14) passes through the filter box (131) and is located at the top of the filter screen (134).

8. The indoor water supply and drainage system according to claim 7, characterized in that, The inside of the filter box (131) is located at the bottom of the filter screen (134) and is inserted and mounted with the filter pipe (133), and one end of the filter pipe (133) passes through the filter box (131) and is connected with the water pipe (5) for toilet use.

Citation Information

Patent Citations

  • Indoor water supply and drainage system

    CN212248484U