Lower flushing pipe flow testing device for pedestal pan

Abstract

The utility model relates to a lower flushing pipe flow testing device for a pedestal pan. The utility model relates to a lower flushing pipe flow testing device for a pedestal pan. The lower flushing pipe flow testing device comprises a testing rack, a fixing module, a water supply module and a control module, the test bench is used for supporting the whole device; the fixing module is used for fixedly installing a lower flushing pipe to be tested and comprises a water inlet sealing clamp, the water inlet sealing clamp comprises a water inlet and a water outlet, the water inlet is used for being connected with the water supply module, and the water outlet is used for being connected with the lower flushing pipe to be tested; the water supply module is used for providing a test water source for the lower flushing pipe, and the control module is used for controlling the device to work and feeding back a test result. According to the lower flushing pipe flow testing device for the pedestal pan, the water inlet sealing clamp convenient to install and connect is arranged, the lower flushing pipe to be tested only needs to be inserted in a butt joint mode when the lower flushing pipe to be tested is replaced and installed, compared with screw screwing installation in the prior art, operation time can be greatly shortened, and production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of toilet production testing, in particular to a lower flushing pipe flow testing device for a toilet. Background Art

[0002] The existing water tankless intelligent toilet is equipped with an upper flushing device and a lower flushing device. The upper flushing device is mainly used to flush the dirt on the inner wall of the toilet to the bottom of the toilet; the lower flushing device is used to impact the drain outlet with a large flow of water to form a siphon phenomenon and flush away all the dirt. As we all know, whether a siphon can be formed mainly depends on the lower flushing device, and the main parameter of the lower flushing device is the flow rate. Only a sufficiently large flow rate can form a siphon. The flow rate of the lower flushing device is completely controlled by the lower flushing pipe, that is, the flow rate of the lower flushing pipe is the flow rate of the lower device. Therefore, the flow rate of the lower flushing pipe needs to be tested before leaving the factory to ensure that it has a large enough flow rate to generate a siphon. The existing method of testing the flow rate of the lower flushing pipe is relatively simple. The lower flushing pipe is connected to the tap water pipe, and the flow meter and water pressure display connected to the tap water pipe are used to determine whether the test is passed. This method is not only inconvenient to operate, but also requires repeated connection and screwing of the lower flushing pipe and the tap water pipe when replacing the test parts; and the test results are not completely accurate, and manual reading of the indication may make mistakes, which seriously affects production efficiency. Utility Model Content

[0003] Based on this, the purpose of the utility model is to provide a flow rate testing device for a lower flushing pipe of a toilet.

[0004] A flow test device for a lower flushing pipe of a toilet, comprising a test bench, a fixing module, a water supply module and a control module; the test bench comprises an operating table and a support leg, the operating table is provided with a through operating window, and the support leg is fixedly connected to the bottom of the operating table; the fixing module comprises a water inlet sealing fixture, one end of the water inlet sealing fixture is fixedly connected to the bottom of the operating table, and the free end of the water inlet sealing fixture is located at the operating window, the water inlet sealing fixture comprises a water inlet and a water outlet, the water inlet is used to connect the water supply module, and the water outlet is used to connect the lower flushing pipe to be tested; the water supply module comprises a water tank, a water supply pipe, a flow meter and a solenoid valve, the water tank is connected to the water inlet sealing fixture through the water supply pipe, and the flow meter and the solenoid valve are installed on the water supply pipe; the control module comprises a processing unit, a switch and an indicator light, the processing unit is control-connected to the solenoid valve and the flow meter, the switch is electrically connected to the processing unit, and the indicator light is electrically connected to the processing unit.

[0005] The utility model discloses a flow test device for the lower flushing pipe of a toilet, which is provided with a water inlet sealing fixture that is easy to install and connect. When replacing and installing the lower flushing pipe to be tested, it only needs to be docked and inserted. Compared with the screw-tightening installation of the prior art, it can greatly reduce the operation time and greatly improve the test efficiency. In addition, the control module is provided to automatically read and display the test results, which is faster and more accurate than manual reading, and can further improve production efficiency.

[0006] Furthermore, the water inlet end of the water inlet sealing clamp is provided with a screw thread at the periphery; the water outlet is provided with a sealing rubber ring. By providing a screw thread at the water inlet, a long-term stable connection can be provided; and the sealing rubber ring is provided at the water outlet to improve the sealing performance.

[0007] Furthermore, the water outlet opening of the water inlet sealing clamp gradually decreases radially from the outside to the inside, with the maximum diameter being larger than the outer diameter of the water inlet of the lower flushing pipe, and the minimum diameter being equal to or slightly larger than the outer diameter of the water inlet of the lower flushing pipe. By specially setting the water outlet to be larger on the outside, it is easier to insert and dock during installation, and smaller on the inside, which is convenient for fixing after insertion.

[0008] Furthermore, the water supply module further includes a water return pipe, which connects the water outlet of the lower flushing pipe and the water inlet of the water tank. By setting the water return pipe, the test water is recycled and reused, thereby improving resource utilization and saving production costs.

[0009] Furthermore, the control module further comprises an auxiliary switch, and the auxiliary switch is electrically connected to the processing unit. By setting the auxiliary switch to work in coordination with the switch, erroneous operation can be avoided.

[0010] Furthermore, the control module also includes an input / output device, which is electrically connected to the processing unit and is used to display output data and input control instructions.

[0011] Furthermore, the fixing module further comprises a fixing base plate and a fixing fixture, wherein one end of the fixing base plate is fixedly connected to the bottom of the operating table and the other end is located at the operating window; there are a plurality of fixing fixtures, one end of which is fixedly connected to the bottom of the operating table and the other end is located at both sides of the fixing base plate. The fixing base plate and the fixing fixture are provided to enhance the supporting and fixing effect of the flushing pipe under test.

[0012] Furthermore, the fixed bottom plate is provided with a groove in the shape of the lower flushing pipe, which is conducive to the fixation of the lower flushing pipe.

[0013] Furthermore, the fixing fixture includes a fixture cylinder and a clamping arm, the fixture cylinder is installed at the bottom of the operating table and is arranged on both sides of the fixed base plate; the clamping arm is fixed to one end of the fixture cylinder close to the fixed base plate, and the end of the clamping arm in contact with the lower flushing pipe is provided with a groove matching the shape of the lower flushing pipe; matchingly, the water inlet sealing fixture is also provided with a fixture cylinder, the fixture cylinder is installed at the bottom of the operating table and faces the fixed base plate, and the water inlet sealing fixture is fixed to one end of the fixture cylinder close to the fixed base plate.

[0014] Furthermore, the water supply module also includes a variable frequency water pump, a pressure sensor and a second solenoid valve; the variable frequency water pump is installed at the water outlet of the water tank, the pressure sensor is installed on the water outlet pipe of the variable frequency water pump, and the water outlet pipe is divided into two branches after passing through the pressure sensor, one branch is connected to the lower flushing pipe, on which the flow meter and the first solenoid valve are arranged, and the other branch is connected to the water inlet of the water tank, on which the second solenoid valve is arranged.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the flow rate testing device for the lower flushing pipe of a toilet according to Example 1;

[0017] Figure 2 This is a front view of the water inlet sealing fixture of Example 1;

[0018] Figure 3 This is a cross-sectional view of the water inlet sealing fixture of Example 1;

[0019] Figure 4 It is a top view of the flow rate testing device for the lower flushing pipe of a toilet according to Example 1;

[0020] Figure 5 A top view of the flow rate testing device for the lower flushing pipe of a toilet according to Example 2;

[0021] Figure 6 This is a perspective view of the operating table of Example 2;

[0022] Figure 7 This is a schematic diagram of a fixed bottom plate of Example 2;

[0023] Figure 8 This is a schematic diagram of a fixing fixture in Example 2;

[0024] Fig. 9 This is a front view of the lower flushing pipe flow rate testing device for a toilet in Example 3. DETAILED DESCRIPTION

[0025] The existing lower flushing pipe testing method connects the lower flushing pipe to the water pipe through a threaded bayonet, and in order to obtain sufficient connection stability and sealing, it needs to be fully tightened. Whenever the test parts are replaced, they must be repeatedly tightened and loosened to complete the disassembly and assembly, which is time-consuming and laborious. In response to this problem, the inventor conducted in-depth research and analysis and believed that the threaded bayonet is designed to provide a long-term stable sealing connection, but it only takes a short time to complete the test in the factory test. Therefore, if other easier-to-disassemble methods can be used to connect the lower flushing pipe and the water pipe during the test, a lot of time can be saved.

[0026] Based on this, the utility model provides a flow test device for the lower flushing pipe of a toilet, which realizes the docking of the lower flushing pipe and the tap water pipe by setting a water inlet sealing clamp, and the lower flushing pipe is directly inserted into the water inlet sealing clamp without additional twisting, which greatly improves the disassembly and assembly efficiency; and the water inlet sealing clamp is provided with a sealing rubber ring at the connection of the lower flushing pipe to enhance the sealing performance. Furthermore, the fixing stability of the lower flushing pipe is improved by providing a fixing module; the accuracy of the test is improved by providing a stable and controllable water source by providing a water supply module; and the test efficiency is effectively improved by providing a control module to control the device to work and feedback the test results.

[0027] The solution of the utility model is described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] See also Figure 1 A toilet lower flushing pipe flow test device includes a test bench 10, a fixing module 20, a water supply module 30 and a control module 40. The test bench 10 is used to support the entire device, the fixing module 20 is used to fix and install the lower flushing pipe to be tested, the water supply module 30 is used to provide the lower flushing pipe with a water source for testing, and the control module 40 is used to control the device and feedback the test results.

[0030] The test bench 10 includes an operating table 11 and a support leg 12. The support leg 12 is fixedly connected to the bottom of the operating table 11, supporting the operating table 11 at a certain height from the ground, so as to facilitate the operation of the operator. The operating table 11 is provided with a through operating window 111, connecting the top and bottom of the operating table 11. The fixing module 20 and the water supply module 30 are installed below the operating table 11, and an electrical box 112 is provided above the operating table 11 for installing the control module 40.

[0031] See also Figure 2-4, the fixing module 20 includes a water inlet sealing fixture 21, which is used to install and connect the lower flushing pipe to be tested. The water inlet sealing fixture 21 is installed at the bottom of the operating table 11 and is located at the operating window 111. The water inlet sealing fixture 21 is provided with a water inlet 211 for connecting a water pipe and a water outlet 212 for connecting the lower flushing pipe to be tested. The water inlet 211 is opened on the side of the water inlet sealing fixture 21 and extends outward for a distance. A thread is provided at the end of its extended section for connecting the water inlet pipeline; the water outlet 212 is provided at one end of the water inlet sealing fixture 21, and the water outlet 212 is internally connected to the water inlet 211. Preferably, a sealing rubber ring is provided at the connection between the water outlet 212 and the internal pipeline, which can provide a better sealing effect after the lower flushing pipe is inserted. More preferably, the opening of the water outlet 212 gradually decreases radially from the outside to the inside, with the maximum diameter being larger than the outer diameter of the water inlet of the lower flushing pipe, and the minimum diameter being equal to or slightly larger than the outer diameter of the water inlet of the lower flushing pipe, which is conducive to the convenient insertion of the lower flushing pipe when docking, and provides a certain clamping effect after insertion to avoid shaking.

[0032] The water supply module 30 includes a water tank 31, a water supply pipe 32, a flow meter 33 and a first solenoid valve 34. The water tank 31 is arranged below the operating table 11 and is used to store test water. The water supply pipe 32 connects the water tank 31 and the water inlet 211 of the water inlet sealing fixture 21. The flow meter 33 is installed on the water supply pipe 32 and is used to measure the flow rate of the water supply pipe 32. The first solenoid valve 34 is also installed on the water supply pipe 32 to control the on-off state of the pipeline. Preferably, the water supply module 30 also includes a return pipe, which connects the water outlet of the lower flushing pipe to be tested and the water inlet of the water tank 31 to recycle the test water and realize the recycling of water resources. More preferably, in order to prevent water from splashing from the water supply module 30, the test bench 10 also includes a baffle 13, which is fixedly connected to the bottom of the operating table 11, covering the connection space between the water supply module 30 and the water inlet sealing clamp 21, to prevent water from overflowing and splashing the operator due to unstable connection or operating errors.

[0033] The control module 40 includes a processing unit, a switch 42 and an indicator light 43. The processing unit can be a single chip microcomputer or any other component with processing and computing capabilities. The processing unit is installed in the electrical box 112 and is electrically connected to the flow meter 33 and the first solenoid valve 34. The switch 42 is set on the operating table 11 or on the surface of the electrical box 112, and any place that is convenient for operation. The utility model does not limit this. In this embodiment, it is set on the operating table 11 as an example. The switch 42 is electrically connected to the processing unit and is used to control the working state of the first solenoid valve 34 through the processing unit. Preferably, an auxiliary switch 44 is also included, and the auxiliary switch 44 is also electrically connected to the processing unit, and controls the working state of the first solenoid valve 34 together with the switch 42. The circuit is considered to be turned on only when the switch 42 and the auxiliary switch 44 are pressed at the same time. There is no response when the switch 42 or the auxiliary switch 44 is pressed alone, thereby avoiding the occurrence of misoperation. The indicator light 43 is installed on the surface of the electrical box 112 or on the operating table 11 or any other place that is easy to observe. The utility model does not limit this. In this embodiment, it is set on the surface of the electrical box 112. The indicator light 43 is electrically connected to the processing unit to indicate the test result. The processing unit receives the measurement result of the flow meter 33 and compares it with a preset qualified threshold. When the measurement result is greater than the qualified threshold, it is determined that the test is qualified and the indicator light 43 is lit.

[0034] Preferably, the control module 40 further includes an input / output device. In this embodiment, the input / output device is a touch screen 45. The touch screen 45 is mounted on the electrical box 112 and is electrically connected to the processing unit. The touch screen 45 is used to display output data, such as flow meter readings, solenoid valve working status, and other data information received by the processing unit; and is also used to input control instructions, such as controlling the flow meter or solenoid valve operation through the touch screen 45.

[0035] When the test device described in this embodiment is used, first align the water inlet of the lower flushing pipe with the water outlet 212 of the water inlet sealing fixture 21 and insert it therein. Then press the switch 42 (or press the switch 42 and the auxiliary switch 44 at the same time) to open the first solenoid valve 34, so that the water in the water tank 31 enters the water supply pipe 32. At the same time, the flow meter 33 records the water flow through the water pipe, and the reading of the flow meter 33 at this time is the flow of the lower flushing pipe. The obtained data is transmitted to the processing unit, and the processing unit compares and processes the flow data and then feeds back through the indicator light 43.

[0036] Compared with the prior art, this embodiment connects the lower flushing pipe to be tested by providing a conveniently connected water inlet sealing fixture, which greatly speeds up the replacement and installation of the lower flushing pipe and effectively improves the test efficiency. In addition, this embodiment also provides a water supply module, which is more convenient for operating the on and off of the water flow. Furthermore, a return pipe is also provided to recycle the test water source, thereby improving resource utilization. At the same time, in order to facilitate the operation of each component, this embodiment is also provided with a control module to perform centralized electrical control and management of the components of the device, which effectively improves the overall integration of the device and reduces learning and operating costs.

[0037] Example 2

[0038] The overall structure of Embodiment 2 is substantially the same as that of Embodiment 1, except that the fixing module 20 further includes a fixing base plate 22 and a fixing fixture 23 .

[0039] See also Figure 5 and 6 The fixed bottom plate 22 is installed at the bottom of the operating table 11 and located at the operating window 111, and is used to place and fix the lower flushing pipe to be tested. Figure 7 As a preference, the fixed bottom plate 22 is provided with a groove in the shape of a lower flushing pipe, which is helpful for assisting in fixing the lower flushing pipe. Figure 8 The fixing fixture 23 includes a fixture cylinder 231 and a clamping arm 232. The fixture cylinder 231 is installed at the bottom of the operating table 11 and is arranged on both sides of the fixed base plate 22. The clamping arm 232 is fixedly connected to one end of the fixture cylinder 231 close to the fixed base plate 22, and the clamping arm 232 is driven to move by the cylinder shaft of the fixture cylinder 231. Preferably, the end of the clamping arm 232 that contacts the lower flushing pipe is provided with a groove that matches the shape of the lower flushing pipe, which is conducive to increasing the contact surface with the lower flushing pipe and enhancing the fixing effect.

[0040] In order to cooperate with the fixed base plate 22 and the fixed fixture 23, the water inlet sealing fixture 21 is also provided with a fixture cylinder 231, which is installed at the bottom of the operating table 11 and faces the fixed base plate 22. The water inlet sealing fixture 21 is fixedly connected to one end of the fixture cylinder 231 close to the fixed base plate 22, and the cylinder shaft of the fixture cylinder 231 drives the water inlet sealing fixture 21 to move.

[0041] When the test device described in this embodiment is used, the lower flushing pipe to be tested is placed on the fixed bottom plate 22, the switch 42 is pressed (or the switch 42 and the auxiliary switch 44 are pressed at the same time), the clamp cylinder 231 starts to work and drives the fixed clamp 23 and the water inlet sealing clamp 21 to move toward the lower flushing pipe, so that the fixed clamp 23 clamps both sides of the lower flushing pipe, and the water inlet sealing clamp 21 is docked with the lower flushing pipe. Then the first solenoid valve 34 is opened, the water tank 31 starts to supply water, and the flow meter 33 records the water flow through the water pipe and transmits it to the processing unit. After the processing unit compares and processes the obtained flow data, it is fed back through the indicator light 43.

[0042] This embodiment achieves a more stable clamping and fixing of the lower flushing pipe to be tested by providing a fixed bottom plate 22 and a fixed fixture 23. In addition, by providing a fixture cylinder 231, the lower flushing pipe can be automatically docked and fixed, which is more accurate and efficient than manual docking.

[0043] Example 3

[0044] See also Fig. 9 The overall structure of Example 3 is basically the same as that of Example 2, except that the water supply module 30 further includes a variable frequency water pump 35, a pressure sensor 36 and a second solenoid valve 37.

[0045] The variable frequency water pump 35 is installed at the water outlet of the water tank 31 and is electrically connected to the processing unit. The water outlet of the water tank 31 is pressurized by the variable frequency water pump 35 and then flows to the remaining water channels. The pressure sensor 36 is installed on the outlet pipe of the variable frequency water pump 35 to detect the pressure of the water flow after being pressurized by the variable frequency water pump 35 and transmit the test data to the processing unit for processing. The water flow pipeline is divided into two routes after the pressure sensor 36, one of which is a water supply pipeline, including the flow meter 33 and the first solenoid valve 34, which is used to provide water to the lower flushing pipe to be tested; the other is a test pipeline, which is connected to the water inlet of the water tank 31, and the second solenoid valve 37 is installed on the test pipeline.

[0046] The test pipeline is used to debug the water supply pressure of the variable frequency water pump 35 before use. During debugging, the first solenoid valve 34 is closed and the second solenoid valve 37 is opened. Water flows out from the water outlet of the water tank 31, is pressurized by the variable frequency water pump 35, flows through the pressure sensor 36 and the second solenoid valve 37 in sequence, and finally flows back to the water tank 31 from the water inlet of the water tank 31. During this period, the pressure of the variable frequency water pump 35 is adjusted to a suitable value according to the indication of the pressure sensor 36.

[0047] In this embodiment, a variable frequency water pump 35 is provided to pressurize the water supply flow, so that the test water flow pressure can be stabilized, a more accurate test result can be obtained, and the test confidence can be improved.

[0048] The terms used in the embodiments of the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present utility model. The singular forms of "a", "said" and "the" used in the embodiments of the present utility model and the claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that, unless otherwise specified, the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; the terms "first", "second", etc. are only used to distinguish, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. The term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, for those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A flow rate test device for a lower flushing pipe of a toilet, characterized in that: It includes a test bench, a fixing module, a water supply module and a control module; the test bench includes an operating table and a supporting leg, the operating table is provided with a through operating window, and the supporting leg is fixedly connected to the bottom of the operating table; the fixing module includes a water inlet sealing fixture, one end of the water inlet sealing fixture is fixedly connected to the bottom of the operating table, and the free end thereof is located at the operating window, the water inlet sealing fixture includes a water inlet and a water outlet, the water inlet is used to connect the water supply module, and the water outlet is used to connect the flushing pipe to be tested; the water supply module includes a water tank, a water supply pipe, a flow meter and a first solenoid valve, the water tank is connected to the water inlet sealing fixture through the water supply pipe, and the flow meter and the first solenoid valve are installed on the water supply pipe; the control module includes a processing unit, a switch and an indicator light, the processing unit is control-connected to the first solenoid valve and the flow meter, the switch is electrically connected to the processing unit, and the indicator light is electrically connected to the processing unit.

2. The toilet lower flushing pipe flow rate testing device according to claim 1, characterized in that: A screw thread is arranged at the periphery of the water inlet end of the water inlet sealing clamp; and a sealing rubber ring is arranged at the inner side of the water outlet.

3. The toilet lower flushing pipe flow rate testing device according to claim 2, characterized in that: The water outlet opening of the water inlet sealing clamp gradually decreases radially from outside to inside, with the maximum diameter being larger than the outer diameter of the water inlet of the lower flushing pipe and the minimum diameter being equal to or slightly larger than the outer diameter of the water inlet of the lower flushing pipe.

4. The toilet lower flushing pipe flow rate testing device according to claim 3, characterized in that: The water supply module also includes a water return pipe, which connects the water outlet of the lower flushing pipe and the water inlet of the water tank.

5. The toilet lower flushing pipe flow rate testing device according to claim 4, characterized in that: The control module further includes an auxiliary switch, and the auxiliary switch is electrically connected to the processing unit.

6. The toilet lower flushing pipe flow rate testing device according to claim 5, characterized in that: The control module also includes an input / output device, which is electrically connected to the processing unit and is used for displaying output data and inputting control instructions.

7. The toilet lower flushing pipe flow rate testing device according to any one of claims 1 to 6, characterized in that: The fixing module also includes a fixing base plate and a fixing clamp, one end of the fixing base plate is fixedly connected to the bottom of the operating table, and the other end is located at the operating window; there are several fixing clamps, one end of which is fixedly connected to the bottom of the operating table, and the other end is located on both sides of the fixing base plate.

8. The toilet lower flushing pipe flow rate testing device according to claim 7, characterized in that: The fixed bottom plate is provided with a groove in the shape of a lower flushing pipe.

9. The toilet lower flushing pipe flow rate testing device according to claim 8, characterized in that: The fixing fixture includes a fixture cylinder and a clamping arm, wherein the fixture cylinder is installed at the bottom of the operating table and is arranged on both sides of the fixed base plate; the clamping arm is fixedly connected to one end of the fixture cylinder close to the fixed base plate, and the end of the clamping arm in contact with the lower flushing pipe is provided with a groove matching the shape of the lower flushing pipe; matchingly, the water inlet sealing fixture is also provided with a fixture cylinder, wherein the fixture cylinder is installed at the bottom of the operating table and faces the fixed base plate, and the water inlet sealing fixture is fixedly connected to one end of the fixture cylinder close to the fixed base plate.

10. The toilet lower flushing pipe flow rate testing device according to claim 9, characterized in that: The water supply module also includes a variable frequency water pump, a pressure sensor and a second solenoid valve; the variable frequency water pump is installed at the water outlet of the water tank, the pressure sensor is installed on the water outlet pipe of the variable frequency water pump, and the water outlet pipe is divided into two branches after passing through the pressure sensor, one branch is connected to the lower flushing pipe, on which the flow meter and the first solenoid valve are arranged, and the other branch is connected to the water inlet of the water tank, on which the second solenoid valve is arranged.

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