Pre-filter with water leakage protection function and upper filter bottle

Abstract

The utility model relates to a prefilter with a water leakage protection function and an overhead filter bottle, which comprises a controller, a machine head with a water inlet channel and a water outlet channel, the filter bottle and a filter mechanism arranged in the filter bottle, a sewage discharge cavity is arranged at the bottom of the machine head, a sewage discharge piece with a sewage discharge valve is arranged in the sewage discharge cavity, an assembly port is arranged at the top of the machine head, and the filter bottle is arranged in the assembly port. The top end of the filter bottle is directly or indirectly closed, an opening in the bottom end of the filter bottle is matched with and detachably connected with the assembly port, a cavity between the filter mechanism and the filter bottle forms an outer cavity, a cavity in the filter mechanism forms an inner cavity, the water inlet channel is communicated with the outer cavity or the inner cavity, and the water outlet channel is correspondingly communicated with the inner cavity or the outer cavity; the water inlet channel or the water outlet channel is provided with a water leakage monitoring protection mechanism. The pre-filter is more optimized in structure and convenient to install, use and maintain. The pre-filter can be matched with occasions which are not suitable for installation of a traditional pre-filter, integrates water leakage monitoring protection, and is high in safety and reliability.

Description

Technical Field

[0001] The utility model relates to a pre-filter with a water leakage protection function and an upper-mounted filter bottle, belonging to the technical field of water purification equipment. Background Art

[0002] The pre-filter in the prior art includes: a machine head, a filter bottle connected to the upper end of the machine head, and a drain ball valve connected to the lower end of the filter bottle. A filter screen skeleton is arranged in the filter bottle, and a filter screen is sleeved on the outer wall of the filter screen skeleton. During use, water flows into the gap between the filter bottle and the filter screen from the water inlet of the machine head, passes through the filter screen and then flows into the center of the filter screen skeleton, and then flows from the center of the filter screen skeleton to the water outlet of the machine head. The pre-filter has now entered thousands of households and high-end hotels.

[0003] Currently, most pre-filters have a lower-mounted filter bottle, and in some installation scenarios, it is inconvenient to install this type of pre-filter. In addition, during the use of the pre-filter, the supporting pipe network often leaks due to accidental situations such as aging, leakage, rupture of the water pipe, the faucet not being tightened or forgotten to be turned off. On the one hand, it causes waste of water resources and an increase in water bills. On the other hand, in severe cases, it will endanger the building, resulting in damage to the house and property losses. Especially in densely populated residential areas, a leak in one place may cause losses to multiple adjacent and lower units, bringing inconvenience to the daily life of residents. In places such as high-end hotels, a water pipe burst may cause a flood, which will seriously damage the high-end facilities in the hotel. Such situations occur frequently in real life. Therefore, the monitoring and protection of water leakage are very necessary. Detecting and solving problems early can avoid the expansion of potential hazards, and water leakage monitoring and protection equipment has emerged as the times require. The purpose of the utility model is to provide a pre-filter with a water leakage protection function and an upper-mounted filter bottle, which has a more optimized structure and is easy to match the installation scenario. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies of the pre-filter in the prior art and provide a pre-filter with a water leakage protection function and an upper-mounted filter bottle. This pre-filter has a more optimized structure and is convenient for installation, use and maintenance. This pre-filter can match the installation scenarios that are not suitable for traditional pre-filters, integrates water leakage monitoring and protection, and has high safety and reliability.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A pre-filter with a water leakage protection function and an upper filter bottle, comprising a controller, a head with an inlet channel and an outlet channel, a filter bottle, and a filtering mechanism disposed inside the filter bottle. A sewage discharge cavity is provided at the bottom of the head, and a sewage discharge member with a sewage discharge valve is disposed inside the sewage discharge cavity. An assembly port is provided at the top of the head. The top end of the filter bottle is directly or indirectly closed, and the bottom end opening is adapted to and detachably connected to the assembly port. The cavity between the filtering mechanism and the filter bottle forms an outer cavity, and the cavity inside the filtering mechanism forms an inner cavity. The inlet channel is communicated with the outer cavity or the inner cavity, and the outlet channel is correspondingly communicated with the inner cavity or the outer cavity.

[0007] A water leakage monitoring and protection mechanism is provided in the inlet channel or the outlet channel. The water leakage monitoring and protection mechanism includes a flow sensor and a flow detection unit.

[0008] The flow sensor detects the water flow rate through the flow monitoring unit and transmits the flow rate data to the controller. When the flow rate data exceeds the set value, the controller issues a fault signal. After the fault is eliminated, the controller resumes the normal working state.

[0009] Preferably, the water leakage monitoring and protection mechanism further includes a control valve with an actuator. The control valve is any one of an electromagnetic valve, a butterfly valve, and a ball valve, and is driven by a valve motor. The valve motor is electrically connected to the controller.

[0010] The flow sensor detects the water flow rate through the flow monitoring unit and transmits the flow rate data to the controller. When the flow rate data exceeds the set value, the controller issues an instruction to close the inlet channel to the control valve. After the fault is eliminated, after receiving an external instruction, the controller issues an instruction to open the inlet channel to the control valve.

[0011] Or an instruction to close the inlet channel, cancel the closing of the inlet channel, or open the inlet channel is manually issued to the controller, and after the controller responds, it issues an operation instruction to the control valve.

[0012] Preferably, the valve motor is fixed to the head through a motor bracket.

[0013] Preferably, the inlet channel is communicated with the outer cavity, and the outlet channel is correspondingly communicated with the inner cavity, forming a pre-filter for external pressure filtration. A diversion plate is fixedly provided on the channel where the inlet channel is communicated with the outer cavity. The diversion plate is provided with a plurality of spiral diversion channels, which can make the water inlet of the inlet channel generate a vortex.

[0014] Preferably, a washing assembly is sleeved and rotatably connected to the filtering mechanism. The washing assembly includes a washing skeleton, a washing part, and blades. The vortex water flow generated by the diversion of the diversion plate can drive the blades, and then drive the washing assembly to rotate, realizing the washing of the filtering mechanism and the filter bottle.

[0015] Preferably, a ratchet structure is provided between the diversion disk and the scraping and washing framework. When the scraping and washing framework is driven by the vortex water flow, it can freely rotate in the direction of the vortex water flow to automatically scrape and wash the filtering mechanism and the filter bottle. When the filtering mechanism rotates in the direction opposite to the vortex water flow under the action of an external force, the scraping and washing framework is restricted by the ratchet structure, and a reverse relative rotation is generated between the scraping and washing framework and the filtering mechanism, so that impurities that get stuck between the scraping and washing framework and the filtering mechanism and affect their free relative rotation can be manually removed.

[0016] Preferably, the filtering mechanism is a filter element. A scraping and washing knob is rotatably and sealingly arranged at the top end of the filter bottle. The inner end of the scraping and washing knob is connected to the end of the filter element, and the filtering mechanism is driven to rotate in the direction opposite to the vortex water flow under the action of an external force by the acting force of the scraping and washing knob.

[0017] Preferably, an assembly port is provided at the top end of the filter bottle. A rotary scraping and sealing member is rotatably and sealingly arranged at the assembly port. Two ends of the rotary scraping and sealing member are respectively connected to the scraping and washing knob and the end of the filter element.

[0018] Preferably, a sewage discharge pipe is arranged inside the filtering mechanism. The cavity of the sewage discharge pipe forms a first sewage discharge channel, which communicates with the sewage discharge member and the outer cavity, and / or a second sewage discharge channel is provided near the sewage discharge cavity of the machine head. The second sewage discharge channel communicates with the outer cavity to discharge impurities deposited inside the machine head.

[0019] Preferably, a communication port is provided on the side of the sewage discharge pipe. The second sewage discharge channel communicates with the communication port, and the ports of the sewage discharge pipe are jointly communicated with the sewage discharge member.

[0020] Preferably, the second sewage discharge channel is arranged away from the direction of water flow impact.

[0021] Preferably, a water outlet elbow and a diversion column are arranged inside the water outlet channel. Sealing elements are provided between the water outlet elbow and the machine head and between the water outlet elbow and the diversion column.

[0022] Preferably, the pre-filter further comprises a housing, including a top cover, a face cover, a front cover and a rear cover. The controller is arranged inside the top cover. The controller includes a display component, a power supply component and a main control board component that are electrically connected.

[0023] Preferably, the controller further includes a spring and a pressing and popping-up component to control the popping-up and resetting of the display component. Sealing elements are provided between the display component and the machine head and the face cover.

[0024] Preferably, the flow sensor includes a Hall flow sensor, an electromagnetic flow sensor, a vortex street flow sensor, an ultrasonic flow sensor and an impeller flow sensor.

[0025] Preferably, the flow sensor is an ultrasonic flow sensor. The flow detection unit includes a reflection element and a reflection element bracket, which are fixed to the ball valve seat. The angle between the reflection element and the water flow direction is 130-140° or 40-50°, the angle between the reflection surfaces of the reflection elements is 85-95°, and the transmitting and receiving poles of the ultrasonic sensor are perpendicular to the water flow direction. Alternatively, the reflection element and the reflection element bracket are omitted, and the transmitting and receiving poles form an acute or obtuse angle with the water flow direction.

[0026] Preferably, the angle between the reflection element and the water flow direction is 135° or 45°, the angle between the reflection surfaces of the reflection elements is 90°, and the transmitting and receiving poles of the ultrasonic sensor are perpendicular to the water flow direction. Alternatively, the reflection element and the reflection element bracket are omitted, and the transmitting and receiving poles form an angle of 30-60° or 120°-150° with the water flow direction.

[0027] Preferably, the sewage discharge component controls the control valve through a sewage discharge motor, and the sewage discharge motor is electrically connected to the controller.

[0028] The beneficial effects of the present utility model are as follows: The structure of this pre-filter is more optimized, and it is convenient for installation, use, and maintenance, and is not easily prone to faults such as jamming. This pre-filter can match occasions where traditional pre-filters are not suitable for installation, integrates leakage monitoring and protection, has high safety and reliability, and can achieve self-cleaning, with a long service life. Description of the Drawings

[0029] Figure 1 is the structural schematic diagram of the present utility model;

[0030] Figure 2 is the structural schematic diagram (exploded view) of the present utility model;

[0031] Figure 3 is the structural schematic diagram (normal water flow state) of the present utility model;

[0032] Figure 4 is the structural schematic diagram (sewage discharge state) of the present utility model;

[0033] Figure 5 is the structural schematic diagram (display component pressing state) of the present utility model;

[0034] Figure 6 is the structural schematic diagram (display component popping-up state) of the present utility model;

[0035] Figure 7 is the structural schematic diagram (cross-sectional view) of the present utility model.

[0036] In the figure: 1. Top cover, 2. Display component, 3. Spring, 4. Pressing and bouncing component, 5. Panel, 6. Battery component, 7. Rear cover, 8. Main control board component, 9. Sewage discharge motor, 10. Front cover, 11. Scrubbing knob, 12. Filter bottle, 13. Water outlet elbow, 14. Sewage discharge pipe, 15. Machine head, 16. Flow guide column, 17. Rotary scrubbing seal, 18. Filter element, 19. Scrubbing skeleton, 20. Flow guide disc, 21. Valve fixing screw, 22. Valve component, 23. Motor bracket, 24. Valve motor, 25. Pressing plate screw, 26. Pressing plate, 27. Ultrasonic sensor, 28. Gasket, 29. Reflector bracket, 30. Reflector. Detailed implementation mode

[0037] The technical solution of the present utility model will be further specifically described below through specific embodiments and in combination with the drawings.

[0038] As Figure 1-7 shown, a pre-filter with a water leakage protection function and an upper-mounted filter bottle includes a controller, a machine head 15 with an inlet channel and an outlet channel, a filter bottle 12, and a filtering mechanism arranged in the filter bottle 12. A sewage discharge cavity is provided at the bottom of the machine head 15, and a sewage discharge member with a sewage discharge valve is arranged in the sewage discharge cavity. An assembly port is provided at the top of the machine head 15. The top end of the filter bottle 12 is directly or indirectly closed, and the bottom end is open and adapted to the assembly port and is detachably connected (screwed or snapped). The cavity between the filtering mechanism and the filter bottle 12 forms an outer cavity, and the cavity inside the filtering mechanism forms an inner cavity. The inlet channel communicates with the outer cavity or the inner cavity, and the outlet channel communicates with the inner cavity or the outer cavity correspondingly;

[0039] A water leakage monitoring and protection mechanism is provided in the inlet channel or the outlet channel. The water leakage monitoring and protection mechanism includes a control valve with an actuator, a flow sensor, and a flow detection unit;

[0040] The flow sensor detects the water flow through the flow monitoring unit and transmits the flow data to the controller. When the flow data exceeds the set value, the controller issues an instruction to close the inlet channel to the control valve; after troubleshooting, the controller receives an external instruction and then issues an instruction to open the inlet channel to the control valve;

[0041] Or an instruction to close the inlet channel, cancel the closing of the inlet channel, or open the inlet channel is manually sent to the controller, and the controller issues an operation instruction to the control valve after responding.

[0042] In this embodiment, the control valve is any one of an electromagnetic valve, a butterfly valve, and a ball valve, and is driven by a valve motor 24. The valve motor 24 is electrically connected to the controller. The valve motor 24 is fixed to the machine head 15 through a motor bracket 23, specifically fixed to the valve component 22. The valve component 22 is fixed to the inlet channel through a valve fixing screw 21.

[0043] Specifically, the water inlet channel is communicated with the outer cavity, and the water outlet channel is correspondingly communicated with the inner cavity, forming a pre-filter for external pressure filtration. A diversion disk 20 is fixedly arranged on the channel where the water inlet channel is communicated with the outer cavity. The diversion disk 20 is provided with a plurality of spiral diversion channels, which can make the water inlet of the water inlet channel generate a vortex.

[0044] Specifically, a scraping and washing assembly is sleeved and rotatably connected to the outside of the filtering mechanism. The scraping and washing assembly includes a scraping and washing framework 19, a scraping and washing part and blades. The vortex water flow generated by the diversion of the diversion disk 20 can drive the blades, and then drive the scraping and washing assembly to rotate, so as to realize the scraping and washing of the filtering mechanism and the filter bottle.

[0045] In this embodiment, a ratchet structure is arranged between the diversion disk 20 and the scraping and washing framework 19. When the scraping and washing framework 19 is driven by the vortex water flow, it can freely rotate in the direction of the vortex water flow to automatically scrape and wash the filtering mechanism and the filter bottle. When the filtering mechanism rotates in the direction opposite to the vortex water flow under the action of an external force, the scraping and washing framework 19 is restricted by the ratchet structure, and a reverse relative rotation is generated between the scraping and washing framework 19 and the filtering mechanism, so that the impurities that block the free relative rotation between the scraping and washing framework 19 and the filtering mechanism can be manually removed.

[0046] In this embodiment, the filtering mechanism is a filter element 18. A scraping and washing knob 11 is rotatably sealed at the top end of the filter bottle 12. The inner end of the scraping and washing knob 11 is connected to the end of the filter element 18. The filtering mechanism is driven to rotate in the direction opposite to the vortex water flow under the action of an external force by the acting force of the scraping and washing knob 11.

[0047] In this embodiment, an assembly port is arranged at the top end of the filter bottle 12. A rotary scraping and sealing member 17 is rotatably sealed at the assembly port. The two ends of the rotary scraping and sealing member 17 are respectively connected to the scraping and washing knob 11 and the end of the filter element 18.

[0048] In this embodiment, a sewage discharge pipe 14 is arranged inside the filtering mechanism. The sewage discharge pipe cavity forms a first sewage discharge channel, which is communicated with the sewage discharge part and the outer cavity, and / or a second sewage discharge channel is arranged near the sewage discharge cavity of the machine head 15. The second sewage discharge channel is communicated with the outer cavity to discharge the impurities deposited in the machine head.

[0049] Specifically, a communication port is arranged on the side of the sewage discharge pipe 14. The second sewage discharge channel is communicated with the communication port, and is jointly communicated with the sewage discharge part through the port of the sewage discharge pipe 14.

[0050] In this embodiment, the second sewage discharge channel is arranged away from the water flow impact direction.

[0051] In this embodiment, a water outlet elbow 13 and a diversion column 16 are arranged in the water outlet channel. Sealing elements are arranged between the water outlet elbow 13 and the machine head 15 and between the water outlet elbow 13 and the diversion column 16.

[0052] In this embodiment, the pre-filter is further provided with a housing, including a top cover 1, a face cover 5, a front cover 10 and a rear cover 7. The controller is arranged inside the top cover 1, and the controller includes a display component 2, a power supply component 6 and a main control board component 8 which are electrically connected. The controller further includes a spring 3 and a pressing and bouncing component 4 to control the bouncing and resetting of the display component 2. A sealing element is arranged between the display component 2, the machine head 15 and the face cover 5.

[0053] Specifically, the flow sensor includes a Hall flow sensor, an electromagnetic flow sensor, a vortex street flow sensor, an ultrasonic flow sensor and an impeller flow sensor. Any one of them can be selected according to needs.

[0054] In this embodiment, the ultrasonic flow sensor 27 is adopted as the flow sensor. The ultrasonic flow sensor 27 is fixed to the water inlet channel through the cooperation of a gasket 28, a pressing plate 26 and a pressing plate screw 25. The flow detection unit includes a reflection element (reflection sheet 30) and a reflection element bracket (reflection sheet bracket 29), which are fixed to the water inlet channel. The included angle between the reflection element and the water flow direction is 130° - 140° or 40° - 50°, and the included angle between the reflection surfaces of the reflection elements is 85° - 95°. The transmitting and receiving poles of the ultrasonic sensor are perpendicular to the water flow direction, or the reflection element and the reflection element bracket are omitted, and the transmitting and receiving poles form an acute angle or an obtuse angle with the water flow direction.

[0055] As a relatively optimal implementation scheme, the included angle between the reflection element and the water flow direction is 135° or 45°, the included angle between the reflection surfaces of the reflection elements is 90°, the transmitting and receiving poles of the ultrasonic sensor are perpendicular to the water flow direction, or the reflection element and the reflection element bracket are omitted, and the transmitting and receiving poles form an angle of 30° - 60° or 120° - 150° with the water flow direction.

[0056] Specifically, the sewage discharge part controls the control valve through a sewage discharge motor 9, and the sewage discharge motor 9 is electrically connected to the controller.

[0057] The beneficial effects of the present utility model are as follows: The structure of the pre-filter is more optimized, and it is convenient for installation, use and maintenance, and is not easy to cause faults such as jamming. The pre-filter can match the occasions where traditional pre-filters are not suitable for installation, integrates leakage monitoring and protection, has high safety and reliability, and can realize self-cleaning, with a long service life.

[0058] The above-described embodiments are only a preferred solution of the present utility model, and do not impose any form of limitation on the present utility model. There are other variations and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A pre-filter with a water leakage protection function and a filter bottle mounted on top, comprising a controller, a head with a water inlet channel and a water outlet channel, a filter bottle, and a filtering mechanism arranged in the filter bottle, characterized in that: The bottom of the machine head is provided with a sewage discharge cavity, and a sewage discharge part with a sewage discharge valve is provided in the sewage discharge cavity. The top of the machine head is provided with an assembly port. The top of the filter bottle is directly or indirectly closed, and the bottom opening is adapted to the assembly port and detachably connected. The cavity between the filter mechanism and the filter bottle constitutes an outer cavity, and the cavity inside the filter mechanism constitutes an inner cavity. The water inlet channel is connected to the outer cavity or the inner cavity, and the water outlet channel is connected to the inner cavity or the outer cavity accordingly. The water inlet channel or the water outlet channel is provided with a water leakage monitoring and protection mechanism, and the water leakage monitoring and protection mechanism includes a flow sensor and a flow detection unit; The flow sensor detects the water flow through the flow monitoring unit and transmits the flow data to the controller. When the flow data exceeds the set value, the controller sends a fault signal; after the fault is eliminated, the controller returns to normal working state.

2. The pre-filter with water leakage protection function and filter bottle mounted on the filter bottle according to claim 1, characterized in that: The water leakage monitoring and protection mechanism also includes a control valve with an actuator, the control valve is any one of a solenoid valve, a butterfly valve, and a ball valve, and is driven by a valve motor, and the valve motor is electrically connected to the controller; The flow sensor detects the water flow through the flow monitoring unit and transmits the flow data to the controller. When the flow data exceeds the set value, the controller sends a command to the control valve to close the water inlet channel; after the fault is eliminated, the controller receives the external command and sends a command to the control valve to open the water inlet channel; Alternatively, a command to close the water inlet channel, cancel the closing of the water inlet channel or open the water inlet channel is manually issued to the controller, and the controller responds and issues an operation command to the control valve.

3. The pre-filter with water leakage protection function and filter bottle mounted on the filter bottle according to claim 2, characterized in that: The valve motor is fixed to the machine head through a motor bracket.

4. The pre-filter with water leakage protection function and filter bottle mounted on the filter bottle according to claim 1, 2 or 3, characterized in that: The water inlet channel is connected to the outer cavity, and the water outlet channel is correspondingly connected to the inner cavity to form a pre-filter for external pressure filtration. A guide plate is fixedly provided on the channel connecting the water inlet channel and the outer cavity. The guide plate is provided with a plurality of spiral guide channels, which can cause the water entering the water inlet channel to generate vortexes.

5. The pre-filter with water leakage protection function and filter bottle mounted on the filter bottle according to claim 4, characterized in that: The filter mechanism is externally provided with a scraping and washing assembly which is rotatably connected thereto. The scraping and washing assembly comprises a scraping and washing frame, a scraping and washing portion and blades. The vortex water flow generated by the guide plate can drive the blades, thereby driving the scraping and washing assembly to rotate, thereby scraping the filter mechanism and the filter bottle.

6. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 5, characterized in that: A ratchet structure is provided between the guide plate and the scraping and washing skeleton. When the scraping and washing skeleton is driven by the vortex water flow, it can rotate freely in the direction of the vortex water flow to automatically scrape and wash the filter mechanism and the filter bottle. When the filter mechanism rotates in the opposite direction of the vortex water flow under the action of external force, the scraping and washing skeleton is restricted by the ratchet structure and produces a reverse relative rotation with the filter mechanism. Impurities stuck between the scraping and washing skeleton and the filter mechanism that affect the free relative rotation of the two can be manually removed.

7. The pre-filter with water leakage protection function and filter bottle mounted on the filter bottle according to claim 6, characterized in that: The filtering mechanism is a filter element, and a scraping knob is provided on the top of the filter bottle for rotational sealing. The inner end of the scraping knob is connected to the end of the filter element. The force of the scraping knob drives the filtering mechanism to rotate in the opposite direction of the vortex water flow under the action of external force.

8. The pre-filter with water leakage protection function and filter bottle mounted on the filter bottle according to claim 7, characterized in that: The top of the filter bottle is provided with an assembly opening, and a rotary scraping seal is provided on the assembly opening for rotational sealing, and the two ends of the rotary scraping seal are respectively connected with the scraping knob and the end of the filter element.

9. The pre-filter with water leakage protection function and filter bottle mounted on top according to any one of claims 1 to 3, characterized in that: The filter mechanism is provided with a drain pipe, the drain pipe cavity constitutes a first drain channel, connecting the drain piece and the outer cavity, and / or the head is provided with a second drain channel near the drain cavity, the second drain channel is connected to the outer cavity, for discharging impurities deposited in the head.

10. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 9, characterized in that: A communication port is provided on the side of the sewage discharge pipe, and the second sewage discharge channel is communicated with the communication port, and is communicated with the sewage discharge member through the port of the sewage discharge pipe.

11. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 10, characterized in that: The second sewage discharge channel is arranged away from the direction of water flow impact.

12. The pre-filter with water leakage protection function and a filter bottle mounted on the filter bottle according to any one of claims 1 to 3, characterized in that: A water outlet elbow and a guide column are arranged in the water outlet channel, and a sealing element is arranged between the water outlet elbow and the machine head and between the water outlet elbow and the guide column.

13. The pre-filter with water leakage protection function and the filter bottle mounted on it according to any one of claims 1 to 3, characterized in that: The pre-filter is also provided with a housing, including a top cover, a surface cover, a front cover and a rear cover. The controller is arranged in the top cover, and the controller includes an electrically connected display component, a power supply component and a main control board component.

14. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 13, characterized in that: The controller also includes a spring and a push-to-pop assembly to control the pop-up and reset of the display assembly. A sealing element is provided between the display assembly and the machine head and the face cover.

15. The pre-filter with water leakage protection function and filter bottle mounted on top according to any one of claims 1 to 3, characterized in that: The flow sensors include Hall flow sensors, electromagnetic flow sensors, vortex flow sensors, ultrasonic flow sensors and impeller flow sensors.

16. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 15, characterized in that: The flow sensor adopts an ultrasonic flow sensor. The flow detection unit includes a reflective element and a reflective element bracket, which are fixed to the ball valve seat. The angle between the reflective element and the water flow direction is 130-140° or 40-50°, the angle between the reflection surfaces of the reflective elements is 85-95°, and the transmitting and receiving electrodes of the ultrasonic sensor are perpendicular to the water flow direction.

17. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 16, characterized in that: The angle between the reflective element and the water flow direction is 135° or 45°, and the angle between the reflective surfaces of the reflective elements is 90°.

18. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 15, characterized in that: The flow sensor adopts an ultrasonic flow sensor, and the transmitting and receiving electrodes form an acute angle or an obtuse angle with the water flow direction.

19. The pre-filter with water leakage protection function and filter bottle mounted on top according to claim 18, characterized in that: The transmitting and receiving electrodes are 30-60° or 120°-150° to the direction of water flow.

20. The pre-filter with water leakage protection function and a filter bottle mounted on top according to any one of claims 1 to 3, characterized in that: The sewage discharge component controls the sewage discharge valve through a sewage discharge motor, and the sewage discharge motor is electrically connected to the controller.

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