Water circulation filtering device of car washer

Abstract

The utility model relates to the field of train cleaning equipment, and discloses a car washer water circulation filtering device which comprises a second lifting pump and a filtering system, a water inlet of the second lifting pump is fixedly connected with a second lifting pump water inlet pipe, and a water outlet of the second lifting pump is fixedly connected with a second lifting pump water outlet pipe. A first lifting pump water outlet pipe is arranged on the surface of the second lifting pump water outlet pipe, a first lifting pump is fixedly connected to one port of the first lifting pump water outlet pipe, a first lifting pump water inlet pipe is fixedly connected to a water inlet of the first lifting pump, and a body refined filter water outlet pipe is arranged on the outer side of the first lifting pump; and a reverse cleaning pump is arranged on the outer side of the first lifting pump. According to the utility model, the system adopts an all-in-one machine filtering system besides inclined plate filtering and a mechanical filter, so that the filtering precision of car washing water is higher, the cleaning effect of car washing is ensured, and the effect is obviously better than that of a conventional water circulating system only provided with a mechanical filter.

Description

Technical Field

[0001] This utility model relates to the field of train cleaning equipment, and in particular to a water circulation and filtration device for a car wash machine. Background Technology

[0002] With the development of my country's economy, cities are facing increasing traffic pressure, and more and more cities are vigorously developing subways. Subways are a form of railway transportation, an urban rail transit system that mainly operates underground. Because they are built underground, subways save urban land, avoid traffic congestion on highways, reduce noise and interference, save energy, and reduce pollution.

[0003] After long-term operation, trains need to be cleaned. During cleaning, the trains enter the main span of the car wash garage and run within it, being cleaned as they run. The clean water flows from the drainage ditch of the main span into the collection pit of the auxiliary span. After entering the collection pit, the water undergoes water circulation and filtration treatment within the auxiliary span. The water circulation is achieved by a lift pump 1 that pumps water from the collection pit to the oil removal tank, then through a three-way oil separator pipe into the inclined plate filter tank. After passing through the inclined plate filter tank, the water flows into the filter tank and then into the water circulation filtration system for further filtration. The lift pump filters the water through a mechanical filter, and an integrated fine filter is added to improve water quality and ensure the effectiveness of the car cleaning. The water treated by the integrated machine flows into the recycled water tank. During car washing, the water supply pump draws water from the recycled water tank for car washing. The washed water then flows back into the drainage ditch of the main span of the car wash garage and into the collection pit of the auxiliary span for further water circulation and filtration, thus improving water quality and the overall quality of the car washing.

[0004] This utility model provides a water circulation filtration system for car wash machines. It mainly consists of an oil separator pipe in the oil removal tank to isolate floating oil in the water, which then enters the inclined plate filter tank, passes through a mechanical filter, and then enters the recycled water tank through an integrated fine filter to supply water for car washing. There is an urgent need for a water circulation filtration system for car wash machines in the existing technology. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a car wash machine water circulation filtration device, which aims to improve the problem that the existing car wash machine water circulation filtration devices lack circulating filtered water for cleaning, resulting in reduced water quality and thus poor cleaning effect.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a car wash machine water circulation filtration device, comprising a second lift pump and a filtration system. The inlet of the second lift pump is fixedly connected to a second lift pump inlet pipe, and the outlet of the second lift pump is fixedly connected to a second lift pump outlet pipe. A first lift pump outlet pipe is provided on the surface of the second lift pump outlet pipe, and a first lift pump is fixedly connected to its port. The inlet of the first lift pump is fixedly connected to a first lift pump inlet pipe, and an integrated fine filter outlet pipe is provided on the outer side of the first lift pump. A backwash pump is installed outside the booster pump. The inlet of the backwash pump is fixedly connected to a backwash inlet pipe, and the outlet of the backwash pump is fixedly connected to a backwash outlet pipe. A filter outlet pipe is installed outside the backwash pump. A filter pump is installed outside the backwash pump, and a filter inlet pipe and a filter outlet pipe are fixedly connected to it. A filter backwash solenoid valve is installed outside the filter outlet pipe, and a fine filter backwash solenoid valve is installed on the outer wall of the filter backwash solenoid valve. The fine filter backwashes... The outer wall of the solenoid valve is equipped with a backwash water pipe for a fine filter. The outer wall of the backwash water pipe is equipped with a mechanical filter. The outer wall of the mechanical filter is equipped with an integrated fine filter. The integrated fine filter is fixedly connected to a fine filter inlet pipe, a fine filter outlet pipe, and a fine filter backwash sludge outlet pipe. The integrated fine filter is also fixedly connected to a fine filter backwash pipe. An intermediate water tank is located on the outer wall of the integrated fine filter. A recycled water tank is located on the side wall of the intermediate water tank. A water collection pit is provided on the outer side of the water collection pit. An oil removal tank is provided on the side wall of the water collection pit. A sedimentation tank is provided on the side wall of the oil removal tank. An inclined plate filter is provided on the side wall of the sedimentation tank. An inclined plate sedimentation tank is provided on the side wall of the inclined plate filter. The car wash water is pumped from the water collection pit to the oil removal tank by a lift pump, and then enters the sedimentation tank through the three-way oil separator pipe of the oil removal tank. After passing through the inclined plate filter, it enters the inclined plate sedimentation tank. Then it is pumped to the intermediate water tank by a lift pump, and then enters the recycled water tank through the integrated filter pump. The washing pump supplies water to the washing nozzles to wash the vehicle.

[0007] As a further description of the above technical solution:

[0008] The filtration system consists of two lift pumps, one filter pump, and one backwash pump. One lift pump goes from the sump to the oil removal tank, and the other lift pump goes from the inclined plate sedimentation tank through the mechanical filter to the intermediate water tank. The filter pump goes through the integrated machine to the recycled water tank, and the backwash pump goes from the recycled water tank to the drainage.

[0009] As a further description of the above technical solution:

[0010] The booster pump is connected to a mechanical filter, which consists of two filter tanks: a sand filter and a carbon filter.

[0011] As a further description of the above technical solution:

[0012] The integrated machine is a two-stage filter, with a primary filter and a secondary precision filter. The precision filtration accuracy can reach μm. It is an ultrafiltration membrane filter. Backwashing includes a primary filter with a filtration accuracy of μm.

[0013] As a further description of the above technical solution:

[0014] The system for circulating and filtering car wash water uses an automatic liquid level control method, which controls the start and stop of each filter based on the liquid level height detected by the liquid level gauge in each pool.

[0015] As a further description of the above technical solution:

[0016] The integrated fine filter is equipped with an outer cover. An electrical control box is fixedly connected to the surface of the outer cover, and a control LCD screen is mounted on the surface of the control box. A pressure gauge for the primary filter and a pressure gauge for the backwash filter are fixedly connected to the outer wall of the outer cover. A fixed inlet pipe and a fixed outlet pipe are installed inside the outer cover. A drain filter is installed inside the outer cover. A drain pipe is located on the left side of the drain filter, and a left-side drain solenoid valve is fixedly connected to its outer wall. A sewage pipe is located on the right side of the drain filter, and a right-side drain solenoid valve is fixedly connected to its surface. The drain filter has a left-side outlet solenoid valve on its top and a right-side outlet solenoid valve on its outer wall. A right-side secondary filter assembly is located on the side wall of the drain filter. A right-side backwash solenoid valve is located on the surface of the right-side secondary filter assembly. A left-side backwash solenoid valve is located on the outer wall of the right-side secondary filter assembly. A primary inlet filter is located on the outer wall of the left-side backwash solenoid valve. A left-side secondary filter assembly is located on the side of the drain filter furthest from the right-side secondary filter assembly. A left-side inlet solenoid valve is located on the surface of the left-side secondary filter assembly. A right-side inlet solenoid valve is located on the outer wall of the left-side inlet solenoid valve.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model provides a water circulation filtration system for a car wash machine to control the filtration quality of the circulating water.

[0019] 2. In this utility model, the water circulation system has a simple structure and is easy to install and maintain.

[0020] 3. In this utility model, only the amount of water used is filtered, ensuring that the recycled water tank has a certain amount of reserve. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a water circulation and filtration device for a car wash machine proposed in this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the water tank in a car wash machine water circulation filtration device proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the system principle of a water circulation and filtration device for a car wash machine proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the filtration system pipeline connection of a water circulation filtration device for a car wash machine proposed in this utility model;

[0025] Figure 5 This is a schematic diagram of the backwash pump pipeline of a water circulation filtration device for a car wash machine proposed in this utility model;

[0026] Figure 6 This is a schematic diagram of the integrated filter connection of a water circulation filter device for a car wash machine proposed in this utility model;

[0027] Figure 7 This is a schematic diagram of the mechanical filter connection of a water circulation filtration device for a car wash machine proposed in this utility model;

[0028] Figure 8 This is a schematic diagram of the integrated piping connection of a water circulation filtration device for a car wash machine proposed in this utility model;

[0029] Figure 9 This is a schematic diagram of the integrated principle of a water circulation and filtration device for a car wash machine proposed in this utility model;

[0030] Figure 10 This is a schematic diagram of the internal piping of an integrated water circulation and filtration device for a car wash machine proposed in this utility model.

[0031] Figure 11 This is a schematic diagram of the front panel of an integrated water circulation and filtration device for a car wash machine proposed in this utility model.

[0032] Legend:

[0033] 1. Second booster pump; 2. Second booster pump inlet pipe; 3. Second booster pump outlet pipe; 4. First booster pump outlet pipe; 5. First booster pump; 6. First booster pump inlet pipe; 7. Fine filter drain pipe; 8. Backwash pump; 9. Backwash inlet pipe; 10. Backwash outlet pipe; 11. Filter outlet pipe; 12. Filter pump; 13. Filter inlet pipe; 14. Filter outlet pipe; 15. Filter backwash solenoid valve; 16. Fine filter backwash solenoid valve; 17. Fine filter backwash water pipe; 18. Mechanical filter; 19. Fine filter inlet pipe; 20. Fine filter outlet pipe; 21. Fine filter backwash pipe; 22. Fine filter backwash sludge outlet pipe; 23. Intermediate water tank; 24. Reclaimed water tank; 25. Sump; 26. Oil removal tank; 27. T-junction oil separator pipe; 28. Second sedimentation tank; 29. Inclined plate filter tank; 30. Inclined plate sedimentation tank 1; 200. Integrated fine filter; 201. Fixed inlet pipe; 202. Fixed outlet pipe; 203. Left drain solenoid valve; 204. Drain pipe; 205. Right drain solenoid valve; 206. Sewage pipe; 207. Drainage filter; 208. Left outlet solenoid valve; 209. Right outlet solenoid valve; 210. Right secondary filter group; 211. Right backwash solenoid valve; 212. Left backwash solenoid valve; 213. Inlet primary filter; 214. Left secondary filter group; 215. Left inlet solenoid valve; 216. Right inlet solenoid valve; 217. Control LCD screen; 218. Electrical control box; 219. Outer casing; 220. Primary filter pressure gauge; 221. Backwash filter pressure gauge. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figures 1-3This utility model provides an embodiment of a car wash machine water circulation filtration device, including a second lift pump and a filtration system. The inlet of the second lift pump is fixedly connected to a second lift pump inlet pipe, and the outlet of the second lift pump is fixedly connected to a second lift pump outlet pipe. A first lift pump outlet pipe is provided on the surface of the second lift pump outlet pipe, and a first lift pump is fixedly connected to its end. The inlet of the first lift pump is fixedly connected to the first lift pump inlet pipe. An integrated fine filter outlet pipe is provided on the outside of the first lift pump. A backwash pump is provided on the outside of the first lift pump, with a backwash inlet pipe fixedly connected to its inlet and outlet pipe. A filter outlet pipe is provided on the outside of the backwash pump, and a filter pump is also provided on the outside of the backwash pump. The filter pump is fixedly connected to a filter inlet pipe and a filter outlet pipe. A filter backwashing solenoid valve is installed on the outside of the filter outlet pipe. A fine filter backwashing solenoid valve is installed on the outer wall of the filter backwashing solenoid valve. A fine filter backwashing water pipe is installed on the outer wall of the fine filter backwashing solenoid valve. A mechanical filter is installed on the outer wall of the fine filter backwashing water pipe. An integrated fine filter is installed on the outer wall of the mechanical filter. The integrated fine filter is fixedly connected to a fine filter inlet pipe, a fine filter outlet pipe, and a fine filter backwash sludge outlet pipe. A fine filter backwashing pipe is fixedly connected to the integrated fine filter. An intermediate water tank is installed on the outer wall of the integrated fine filter. A reclaimed water tank is installed on the side wall of the intermediate water tank. The outer side of the reclaimed water tank... A water collection pit is provided, with an oil removal tank on its side wall. A second sedimentation tank is located on the side wall of the oil removal tank, serving as a transition tank between the oil removal tank and the inclined plate filter tank. This sedimentation tank is used for primary sedimentation treatment of the oil-removed car wash water. An inclined plate filter tank is located on the side wall of the sedimentation tank, and an inclined plate sedimentation tank (first sedimentation tank) is located on the side wall of the inclined plate filter tank. This first sedimentation tank serves as a transition tank between the inclined plate filter tank and the second lift pump, used for deep sedimentation treatment of the filtered car wash water. This system is installed in the car wash water circulation and filtration system equipment room of the auxiliary bay of the car wash machine. Below the car wash equipment room is a water tank, including a water circulation filter tank and a cleaning water tank. The inlet pipe of the car wash machine's water circulation and filtration system is located below the water surface in the water tank, near the bottom, while the other parts are installed at the top of the water tank. A car wash machine water circulation and filtration system includes a lift pump 1, a lift pump 2, a filter pump, a backwash pump, a mechanical filter, and an integrated fine filter. All equipment is installed in the auxiliary span of the car wash machine's water circulation and filtration system equipment room at the top of the water tank. After washing the car, the water flows from the main span's drainage ditch into the collection pit in the auxiliary span equipment room. The lift pump 1 pumps the water from the collection pit to an oil removal tank, where it passes through a three-way oil separator to remove floating oil. The clean water flows into a sedimentation tank 2 for primary sedimentation, then through an inclined plate filter for further filtration. It then flows into an inclined plate sedimentation tank 1 for deep sedimentation, and is then pumped by the lift pump 2 to the mechanical filter. The water from the mechanical filter flows into an intermediate water tank, and then is pumped by the filter pump into the integrated fine filter. The water filtered by the integrated fine filter enters a reuse water tank.Water is supplied by a water pump to the nozzles of the car wash machine's spray pipes to clean the vehicle, completing the water circulation and filtration system.

[0036] Reference Figures 4-6 A water circulation filtration system for a car wash machine includes a filtration system consisting of two lift pumps (lift pump one and lift pump two), a filter pump, and a backwash pump. Lift pump one draws water from a sump to an oil removal tank, while lift pump two draws water from an inclined plate sedimentation tank, through a mechanical filter, to an intermediate water tank. The filter pump draws water from an integrated fine filter to a recycled water tank. The backwash pump draws water from the recycled water tank to the mechanical filter for backwashing, and the backwashed water is discharged. The backwash pump also draws water to the integrated fine filter for backwashing, and the backwashed water is discharged. Backwashing is achieved by switching solenoid valves; one valve opens to backwash the mechanical filter, and the other opens to backwash the integrated fine filter. The water circulation filtration system of this device automatically controls the liquid level; each water tank has a level gauge, and the filter operation is controlled according to the level gauge height.

[0037] Reference Figures 3-5 A water circulation filtration system for a car wash machine includes a second lift pump connected to a mechanical filter, which consists of two filter tanks: a sand filter and a carbon filter. Water that has undergone deep sedimentation in an inclined plate sedimentation tank passes through the first lift pump and the two mechanical filters before entering the intermediate water tank.

[0038] Reference Figure 3 , Figures 7-9 A water circulation filtration system for a car wash machine includes an integrated fine filter that is a two-stage filter. The first stage is pre-filtration, and the second stage is precision filtration. The precision filtration accuracy can reach the micron level, using an ultrafiltration membrane filter. Backwashing is performed using a first-stage pre-filter with micron-level filtration accuracy. The integrated fine filter has four inlet and outlet pipes: an inlet pipe, an outlet pipe, a backwashing pipe, and a drain pipe. The inlet and outlet pipes are used for filtration, while the backwashing and drain pipes are used for backwashing the filters. The integrated fine filter is an automatically controlled device. The second-stage filters are arranged on both sides, with multiple filters connected in parallel in each group. Each group of filters can filter simultaneously or work separately. Backwashing and filtration can be performed simultaneously; filtration can be performed on one side while backwashing is performed on the other.

[0039] Reference Figures 10-11The integrated fine filter is equipped with an outer casing. An electrical control box is fixedly connected to the surface of the casing, and the control box has a control LCD screen. A pressure gauge for the primary filter and a pressure gauge for the backwash filter are also fixedly connected to the outer wall of the casing. A fixed inlet pipe and a fixed outlet pipe are located inside the casing. A drain filter is also located inside the casing. A drain pipe is located on the left side of the drain filter, and a left-side drain solenoid valve is fixedly connected to its outer wall. A sewage discharge pipe is located on the right side of the drain filter, and a right-side drain solenoid valve is fixedly connected to its surface. The water filter has a left-side outlet solenoid valve on its top and a right-side outlet solenoid valve on its outer wall. The drain filter has a right-side secondary filter assembly on its side wall and a right-side backwash solenoid valve on its surface. The right-side backwash solenoid valve is located on its outer wall, and an inlet primary filter is located on its outer wall. The drain filter has a left-side secondary filter assembly on its side away from the right-side secondary filter assembly and a left-side inlet solenoid valve on its surface. The right-side inlet solenoid valve is located on its outer wall.

[0040] Reference Figures 10-11 Furthermore, the fixed inlet pipe is connected to the primary inlet filter, which is then connected to the right and left inlet solenoid valves respectively. The right and left inlet solenoid valves are connected to the right and left secondary filter groups respectively. The right and left secondary filter groups are connected to the left and right outlet solenoid valves respectively. The left and right outlet solenoid valves are connected to the fixed outlet pipe, thus completing the filtration by the right and left secondary filter groups. The water then flows through the fixed outlet pipe to the recycled water tank.

[0041] Reference Figures 10-11 Furthermore, it is necessary to backwash the right-side and left-side secondary filter groups. During backwashing, water is drawn from the backwashing pump in the recycled water tank through the drain pipe. The backwashing solenoid valve of the fine filter is opened, and the water then enters the drain pipe through the backwashing pipe of the fine filter. The drain pipe is connected to the drain filter, which is connected to the right-side and left-side backwashing solenoid valves respectively. The right-side and left-side backwashing solenoid valves are connected to the right-side and left-side secondary filter groups respectively. The right-side and left-side secondary filter groups are connected to the right-side and left-side drain solenoid valves respectively. The left-side and right-side drain solenoid valves are connected to the sewage discharge pipe to complete the sewage discharge.

[0042] Reference Figures 10-11Furthermore, the integrated fine filter is fully enclosed by a casing, with an electrical control box located in front of the casing. The control box contains a control LCD screen for operating the integrated fine filter. Below the control box are two pressure gauges, connected to the pressure gauges of the primary filter and the backwash filter, respectively. The inlet primary filter, drain filter, right-side secondary filter group, and left-side secondary filter group, which monitor system pressure, are all fixed inside the fully enclosed casing.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water circulation and filtration device for a car wash machine, characterized in that: Includes a second booster pump (1) and a filtration system. The inlet of the second booster pump (1) is fixedly connected to a second booster pump inlet pipe (2), and the outlet of the second booster pump (1) is fixedly connected to a second booster pump outlet pipe (3). A first booster pump outlet pipe (4) is provided on the surface of the second booster pump outlet pipe (3). A first booster pump (5) is fixedly connected to the port of the first booster pump outlet pipe (4). A first booster pump inlet pipe (6) is fixedly connected to the inlet of the first booster pump (5). An integrated fine filter outlet pipe (7) is provided on the outside of the first booster pump (5). A backwash pump (8) is provided on the outside of the first booster pump (5). A backwash inlet pipe (9) is fixedly connected to the inlet end of the backwash pump (8). (8) has a backwash outlet pipe (10) fixedly connected to its outlet end. A filter outlet pipe (11) is provided on the outside of the backwash pump (8). A filter pump (12) is provided on the outside of the backwash pump (8). A filter inlet pipe (13) is fixedly connected to the filter pump (12). A filter outlet pipe (14) is fixedly connected to the filter pump (12). A filter backwash solenoid valve (15) is provided on the outside of the filter outlet pipe (14). A fine filter backwash solenoid valve (16) is provided on the outer wall of the filter backwash solenoid valve (15). A fine filter backwash water pipe (17) is provided on the outer wall of the fine filter backwash water pipe (17). A mechanical... The filter (18) has an integrated fine filter (200) on its outer wall. The integrated fine filter (200) is fixedly connected to a fine filter inlet pipe (19), a fine filter outlet pipe (20), a fine filter backwash outlet pipe (22), and a fine filter backwash pipe (21). The integrated fine filter (200) has an intermediate water tank (23) on its outer wall. A recycled water tank (24) is provided on the side wall of the intermediate water tank (23). A water collection pit (25) is provided on the outside of the recycled water tank (24). The side wall is provided with an oil removal tank (26), the side wall of the oil removal tank (26) is provided with a sedimentation tank two (28), the side wall of the sedimentation tank two (28) is provided with an inclined plate filter tank (29), the side wall of the inclined plate filter tank (29) is provided with an inclined plate sedimentation tank one (30). The car wash water is lifted to the oil removal tank (26) by the lifting pump one (5) through the water collection pit (25), and then enters the sedimentation tank two (28) through the three-way oil separator pipe (27) of the oil removal tank (26). After passing through the inclined plate filter tank (29), it enters the inclined plate sedimentation tank one (30), and then passes through the lifting pump two (1) to the intermediate water tank (23). After passing through the integrated machine filter pump (12), it enters the recycled water tank (24). The cleaning pump supplies water to the cleaning nozzle to clean the vehicle.

2. The water circulation and filtration device for a car wash machine according to claim 1, characterized in that: The filtration system consists of two lift pumps, a filter pump (12), and a backwash pump. One lift pump goes from the sump (25) to the oil removal tank (26), and the other lift pump goes from the inclined plate sedimentation tank (30) through the mechanical filter (18) to the intermediate water tank (23). The filter pump (12) goes through the integrated machine to the recycled water tank (24), and the backwash pump goes from the recycled water tank (24) to the drainage.

3. The water circulation and filtration device for a car wash machine according to claim 1, characterized in that: The booster pump (5) is connected to a mechanical filter (18), which consists of two filter tanks: a sand filter and a carbon filter.

4. The water circulation and filtration device for a car wash machine according to claim 1, characterized in that: The integrated machine is a two-stage filter, with a primary filter and a secondary precision filter. The precision filtration accuracy can reach one μm. It is an ultrafiltration membrane filter. Backwashing includes a primary filter with a filtration accuracy of five μm.

5. The water circulation and filtration device for a car wash machine according to claim 1, characterized in that: The system for circulating and filtering car wash water uses an automatic liquid level control method, which controls the start and stop of each filter based on the liquid level height detected by the liquid level gauge in each pool.

6. The water circulation and filtration device for a car wash machine according to claim 1, characterized in that: The integrated fine filter (200) has an outer cover (219) on its outer wall. An electrical control box (218) is fixedly connected to the surface of the outer cover (219). A control LCD screen (217) is installed on the surface of the electrical control box (218). A primary filter pressure gauge (220) is fixedly connected to the outer wall of the outer cover (219). A backwash filter pressure gauge (221) is fixedly connected to the outer wall of the outer cover (219). A fixed water inlet pipe (201) is installed inside the outer cover (219). A fixed water outlet pipe (202) is installed inside the outer cover (219). A drain filter (207) is installed inside the outer cover (219). A drain pipe (204) is installed on the left side of the drain filter (207). A left-side drain solenoid valve (203) is fixedly connected to the outer wall of the drain pipe (204). A sewage pipe (206) is installed on the right side of the drain filter (207). A sewage pipe (206) is fixedly connected to the surface of the sewage pipe (206). The drain filter (207) has a right-side drain solenoid valve (205), a left-side outlet solenoid valve (208) is provided on the top of the drain filter (207), a right-side outlet solenoid valve (209) is provided on the outer wall of the left-side outlet solenoid valve (208), a right-side secondary filter group (210) is provided on the side wall of the drain filter (207), a right-side backwash solenoid valve (211) is provided on the surface of the right-side secondary filter group (210), a left-side backwash solenoid valve (212) is provided on the outer wall of the right-side secondary filter group (210), an inlet primary filter (213) is provided on the outer wall of the left-side backwash solenoid valve (212), a left-side secondary filter group (214) is provided on the side of the drain filter (207) away from the right-side secondary filter group (210), a left-side inlet solenoid valve (215) is provided on the surface of the left-side secondary filter group (214), and a right-side inlet solenoid valve (216) is provided on the outer wall of the left-side inlet solenoid valve (215).

Images