Closestool flushing device and flushing method thereof

Abstract

The invention discloses a closestool flushing device and a flushing method thereof, the closestool flushing device comprises a closestool body, a water tank, a water suction pump, a water distribution pipe and a circuit board, and the closestool body is provided with an upper flushing port and a lower flushing port. The water distribution pipe comprises a water inlet, a first water outlet and a second water outlet, the water inlet is communicated with an outlet of the water suction pump, the first water outlet is communicated with the upper flushing port, the second water outlet is communicated with the lower flushing port, an inlet of the water suction pump is communicated with the water tank, and the minimum through-flow sectional area of the upper flushing waterway is smaller than that of the lower flushing waterway. The closestool flushing device has a brush ring flushing state and a main flushing state, and in the brush ring flushing state, the circuit board controls the power of the water suction pump to be a first preset value so as to control the flow of the upper flushing opening to be larger than that of the lower flushing opening; in the main flushing state, the circuit board controls the power of the water suction pump to be a second preset value so as to control the flow of the lower flushing opening to be larger than the flow of the upper flushing opening, and the second preset value is larger than the first preset value.

Description

Technical Field

[0001] This invention relates to the field of toilet technology, and in particular to a toilet flushing device and flushing method thereof. Background Technology

[0002] Currently, the smart toilet market offers many pump-flush toilets (that is, toilets that use a pump to flush water), which generally fall into the following two categories: Option 1: Use a pump combined with an electronic water distribution valve to control the switching of the flushing water path to achieve the switching between top flush and bottom flush (i.e., switching the water output from the top flush outlet and the bottom flush outlet of the toilet).

[0003] Option 2: Control the upstroke and downstroke separately using two pumps to switch the order of upstroke and downstroke.

[0004] In addition, some smart toilets are now commonly equipped with a foam shield function (which delivers foam to the toilet bowl through a foaming device to prevent splashing and odor). To achieve the foam shield function, a separate water pump is usually required to pump water from the water tank to the foam liquid mixing tank for water injection, mixing, and foaming.

[0005] The problem with the existing technology is that implementing the flushing switching or foaming function of a pump-flush toilet requires numerous electronic components. For example, flushing switching requires an electronic diverter valve, while the foaming function requires a separate water pump for foaming. Therefore, in actual use, malfunctions frequently occur due to abnormalities in the electronic components (electronic diverter valve or foaming water pump), increasing after-sales issues for smart toilets. Furthermore, the overall flushing noise of the water pump combined with the electronic diverter valve is relatively high. Summary of the Invention

[0006] The present invention aims to provide a toilet flushing device and flushing method, which enables the toilet to achieve relative upward and downward flushing, and while ensuring the flushing effect, has a simpler structure, lower cost, and less flushing noise.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: First embodiment: A toilet flushing device includes a toilet body, a water tank, a water pump, a water distribution pipe, and a circuit board. The toilet body has an upper flushing port and a lower flushing port located below the upper flushing port. The water distribution pipe includes an inlet, a first outlet, and a second outlet. The inlet is connected to the outlet of the water pump through a first connecting pipe. The first outlet is connected to the upper flushing port through a second connecting pipe. The second outlet is connected to the lower flushing port through a third connecting pipe. The inlet of the water pump is connected to the water tank. The circuit board is electrically connected to the water pump to control the opening and closing of the water pump and its power. The water distribution pipe has a first branch port and a second branch port. The water flow from the inlet is connected to the first outlet through the first branch port, and the water flow from the inlet is connected to the second outlet through the second branch port. The water path from the first branch port to the upper flushing port is the upper flushing water path, and the water path from the second branch port to the lower flushing port is the lower flushing water path. The minimum flow cross-sectional area of ​​the upper flushing water path is smaller than the minimum flow cross-sectional area of ​​the lower flushing water path. The toilet flushing device has a brush ring flushing state and a main flushing state. In the brush ring flushing state, the circuit board controls the power of the water pump to a first preset value so as to control the flow rate of the upper flushing port to be greater than the flow rate of the lower flushing port. In the main flushing state, the circuit board controls the power of the water pump to a second preset value so as to control the flow rate of the lower flushing port to be greater than the flow rate of the upper flushing port, wherein the second preset value is greater than the first preset value.

[0008] A second preferred embodiment: Based on the first embodiment, further, in the brush ring rinsing state, the flow rate of the lower rinsing port is less than 0.5 L / s, and the shape of the lower rinsing port is circular.

[0009] The third preferred implementation scheme is as follows: Based on the first implementation scheme, the first preset value is 20%-30%, the second preset value is 40%-60%, the diameter of the lower flushing port is 10mm-20mm, and the diameter of the upper flushing port is 5mm-8mm.

[0010] Fourth preferred embodiment: Based on the first embodiment, the toilet flushing device further includes a functional water component, and the water distribution pipe includes a third water outlet. The water inlet of the functional water component is connected to the third water outlet through a fourth connecting pipe. A third diversion port is also formed inside the water distribution pipe. The water flow from the inlet is connected to the third water outlet through the third diversion port. The third diversion port is located on the bottom wall of the water distribution pipe and is upstream of the first diversion port and the second diversion port. The water path from the third diversion port to the water inlet of the functional water component is the functional water path. The toilet flushing device also has a functional water use state. In the functional water use state, the circuit board controls the power of the water pump to a third preset value, and the third preset value is less than the first preset value, so that the water flow from the inlet of the water distribution pipe flows out from the third outlet after passing through the third diversion port first.

[0011] Fifth preferred implementation scheme: Based on the fourth preferred implementation scheme, further, the first preset value is 20%-30%, the second preset value is 40%-60%, the third preset value is 16%-18%, and the minimum flow cross-sectional area of ​​the upper flushing water path: the minimum flow cross-sectional area of ​​the lower flushing water path: the minimum flow cross-sectional area of ​​the functional water path = 3:4:1.

[0012] The sixth preferred embodiment: Based on the fourth preferred embodiment, the diameter of the lower flushing port is 10mm-20mm, the diameter of the upper flushing port is 5mm-8mm, and the diameter of the water inlet is 3mm-8mm.

[0013] The seventh preferred embodiment: Based on the fourth preferred embodiment, the inner diameter of the water inlet of the water distribution pipe is 24-25mm, the inner diameter of the first water outlet is 16-18mm, the inner diameter of the second water outlet is 24-25mm, and the inner diameter of the third water outlet is 6-8mm.

[0014] Eighth preferred embodiment: Based on the fourth preferred embodiment, further, the inner diameter of the water distribution pipe corresponding to the third diversion port is D1, the inner diameter of the water inlet is D2, the inner diameter of the second water outlet is D3, D1 < D2, and D1 < D3, and a water baffle is also provided between the third diversion port and the second diversion port.

[0015] Furthermore, the present invention also provides a toilet flushing method, which employs the toilet flushing device described in any of the preferred embodiments of 1-8 above, and includes the following steps: S1 brush ring rinsing step, causing the circuit board to control the water pump to run at a first preset power for a predetermined time; S2 main flushing step, which causes the circuit board to control the water pump to run at a second preset power for a predetermined time; The S3 water seal replenishment step enables the circuit board to control the water pump to run at a first preset power for a predetermined time.

[0016] By adopting the above technical solution, the present invention can achieve the following technical effects: This invention designs the minimum flow cross-sectional area of ​​the upper flushing water path to be smaller than that of the lower flushing water path. In the brush ring flushing state, the circuit board controls the power of the water pump at a first preset value to ensure the flow rate at the upper flushing port is greater than that at the lower flushing port. In the main flushing state, the circuit board controls the power of the water pump at a second preset value to ensure the flow rate at the lower flushing port is greater than that at the upper flushing port, where the second preset value is greater than the first preset value. By combining the relationship between the minimum flow cross-sectional areas of the upper and lower flushing water paths with the water pump power, and replacing the existing electronic water valve with a simpler and lower-cost water distribution pipe, the relative flow rates of the upper and lower flushing can be controlled, thereby controlling different flushing states and achieving a good flushing effect. Specifically, when the power of the water pump is controlled at the first preset value, the flow rate of the upper flushing port is greater than that of the lower flushing port, and the flow rate of the lower flushing port is smaller (or even zero). At this time, the water flow is mainly used for upper flushing to achieve brush ring flushing. When the power of the water pump is controlled at the second preset value, the flow rate of the lower flushing port is greater than that of the upper flushing port. At this time, the water flow is mainly used for lower flushing to achieve main flushing.

[0017] The technical solution of this invention achieves "relative up-and-down flushing mode switching" by controlling the relative flow rates of the upper and lower flushing ports (relative up-and-down flushing mode switching means that when the flow rate of the upper flushing port is greater than that of the lower flushing port, it is in up-flushing mode, and when the flow rate of the lower flushing port is greater than that of the upper flushing port, it is in down-flushing mode). Compared with the prior art's solutions one and two, which use "absolute up-and-down flushing mode switching" (absolute up-and-down flushing mode switching means complete switching; during up-flushing, the lower flushing port is completely shut off, and during down-flushing, the upper flushing port is completely shut off), while ensuring flushing effect, it has a simpler structure, lower cost, and less flushing noise because it eliminates the need for an electronic water distribution valve or a separate foaming pump. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a perspective assembly diagram of the toilet flushing device according to the first embodiment of the present invention; Figure 2 This is a perspective sectional view of the toilet flushing device according to the first embodiment of the present invention; Figure 3 This is a partial schematic diagram of the toilet flushing device according to the first embodiment of the present invention; Figure 4This is a schematic diagram of the water distribution pipe according to the first embodiment of the present invention; Figure 5 This is a cross-sectional view of the water distribution pipe according to the first embodiment of the present invention; Figure 6 This is a perspective assembly diagram of the toilet flushing device according to the second embodiment of the present invention; Figure 7 This is a perspective sectional view of the toilet flushing device according to the second embodiment of the present invention; Figure 8 This is a partial schematic diagram of the toilet flushing device according to the second embodiment of the present invention; Figure 9 This is a schematic diagram of the water distribution pipe according to the second embodiment of the present invention; Figure 10 This is a cross-sectional view of the water distribution pipe according to the second embodiment of the present invention; Figure 11 This is a schematic diagram of the water distribution pipe according to the third embodiment of the present invention; Figure 12 This is a cross-sectional view of the water distribution pipe according to the third embodiment of the present invention.

[0020] icon: 1-Toilet body; 11-Upper flush outlet; 12-Lower flush outlet; 13-Upper flush connector; 14-Lower flush connector; 2-Water tank; 3-Water pump; 31-Water pump inlet pipe; 4-Diverter pipe; 41-Inlet; 42-First outlet; 43-Second outlet; 44-Third outlet; 45-First branch outlet; 46-Second branch outlet; 47-Third branch outlet; 48-Water baffle; 5-Functional water fittings; 6-Connecting pipe; 61-First connecting pipe; 62-Second connecting pipe; 63-Third connecting pipe; 64-Fourth connecting pipe; 7-Inlet valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The terms “top,” “bottom,” “upper,” “lower,” “left,” “right,” “front,” “back,” and similar expressions used in this document are for illustrative purposes only. The terms “first,” “second,” etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or the quantity, specific order, or primary or secondary relationship of the indicated technical features. The term “several” means one or more, and “multiple” means two or more, unless otherwise explicitly specified.

[0023] First embodiment (the water distribution pipe is a T-shaped pipe) Combination Figures 1 to 5 The first preferred embodiment of the present invention provides a toilet flushing device, including a toilet body 1, a water tank 2, a water pump 3, a water distribution pipe 4, and a circuit board (not shown). The toilet body 1 is provided with an upper flushing port 11 and a lower flushing port 12 located below the upper flushing port 11. Specifically, an upper flushing connector 13 is fixedly provided at the upper part of the toilet bowl of the toilet body 1, and the water outlet of the upper flushing connector 13 forms the upper flushing port 11; a lower flushing connector 14 is fixedly provided at the bottom of the toilet bowl of the toilet body 1, and the water outlet of the lower flushing connector 14 forms the lower flushing port 12. The water distribution pipe 4 includes an inlet 41, a first outlet 42, and a second outlet 43. Each outlet of the water distribution pipe 4 is connected to the water pump 3, the upper flush connector 13, and the lower flush connector 14 via connecting pipes 6. Specifically, the inlet 41 of the water distribution pipe 4 is connected to the outlet of the water pump 3 via the first connecting pipe 61, the first outlet 42 is connected to the upper flush connector 11 via the second connecting pipe 62, and the second outlet 43 is connected to the lower flush connector 12 via the third connecting pipe 63. The inlet of the water pump 3 is connected to the water tank 2 via the water pump inlet pipe 31. The circuit board is electrically connected to the water pump 3 to control the opening and closing of the water pump 3 and its power level. The circuit board can be installed inside the toilet seat assembly (not shown) and is electrically connected to the water pump 3 via wires.

[0024] The water distribution pipe 4 has a first branch port 45 and a second branch port 46. The water flow from the inlet 41 is connected to the first outlet 42 through the first branch port 45, and the water flow from the inlet 41 is connected to the second outlet 43 through the second branch port 46. The water path from the first branch port 45 to the upper flushing port 11 is the upper flushing water path, and the water path from the second branch port 46 to the lower flushing port 12 is the lower flushing water path. The minimum flow cross-sectional area of ​​the upper flushing water path is smaller than the minimum flow cross-sectional area of ​​the lower flushing water path.

[0025] The toilet flushing device has a brush ring flushing state and a main flushing state. In the brush ring flushing state, the circuit board controls the power of the water pump 3 to a first preset value so that the flow rate of the upper flushing port 11 is greater than the flow rate of the lower flushing port 12. In the main flushing state, the circuit board controls the power of the water pump 3 to a second preset value so that the flow rate of the lower flushing port 12 is greater than the flow rate of the upper flushing port 11. The second preset value is greater than the first preset value.

[0026] The minimum flow cross-sectional area of ​​the upper flushing water path is designed to be smaller than that of the lower flushing water path. In the brush ring flushing state, the circuit board controls the power of the water pump 3 to a first preset value, ensuring that the flow rate at the upper flushing port 11 is greater than the flow rate at the lower flushing port 12. In the main flushing state, the circuit board controls the power of the water pump 3 to a second preset value, ensuring that the flow rate at the lower flushing port 12 is greater than the flow rate at the upper flushing port 11. The second preset value is greater than the first preset value. By combining the relationship between the minimum flow cross-sectional areas of the upper and lower flushing water paths with the power of the water pump, the relative flow rates of the upper and lower flushing can be controlled by replacing the existing electronic water valve with a simpler and lower-cost water distribution pipe, thereby controlling different flushing states and achieving a good flushing effect. Specifically, when the power of the water pump 3 is controlled at the first preset value, the flow rate of the upper flushing port 11 is greater than the flow rate of the lower flushing port 12, and the flow rate of the lower flushing port 12 is smaller (or even zero). At this time, the water flow is mainly used for upper flushing to achieve brush ring flushing. When the power of the water pump 3 is controlled at the second preset value, the flow rate of the lower flushing port 12 is greater than the flow rate of the upper flushing port 11. At this time, the water flow is mainly used for lower flushing to achieve main flushing.

[0027] In this embodiment, preferably, during the brush ring rinsing state, the flow rate of the lower rinsing port is less than 0.5 L / s, and the lower rinsing port 12 is circular. Designing the lower rinsing port 12 as circular prevents excessive water pressure from flowing out during the brush ring rinsing state, ensuring that water primarily flows out from the upper rinsing port 11. Controlling the flow rate of the lower rinsing port to less than 0.5 L / s during the brush ring rinsing state results in a better rinsing effect.

[0028] In this embodiment, the first preset value is 20%-30%, and the second preset value is 40%-60%. Within this range, it can be further effectively ensured that during the brush ring rinsing state, the water mainly flows out from the upper rinsing port 11, while only a small portion (or even none) flows out from the lower rinsing port 12, with a larger proportion of water flowing out from the upper rinsing port 11; during the main rinsing state, the water can flow out from both the upper rinsing port 11 and the lower rinsing port 12 simultaneously, and the proportion flowing out from the lower rinsing port 12 increases.

[0029] In this embodiment, the diameter of the lower rinsing port 12 is 10mm-20mm, and the diameter of the upper rinsing port 11 is 5mm-8mm. Designing the diameter of the lower rinsing port 12 to be larger than that of the upper rinsing port 11 can further effectively ensure that, during brush ring rinsing, the water flow mainly flows out from the upper rinsing port 11, while only a small portion (or even none) flows out from the lower rinsing port 12, and the proportion of water flowing out from the upper rinsing port 11 is larger.

[0030] In this embodiment, the water distribution pipe 4 is a three-way pipe, with only three openings: inlet 41, first outlet 42, and second outlet 43.

[0031] In this embodiment, the water tank 2 is also equipped with a water inlet valve 7. The water inlet valve 7 can adopt an existing known structure and is used to replenish water to the water tank 2.

[0032] In this embodiment, the connecting pipe 6 (including the first connecting pipe 61, the second connecting pipe 62, and the third connecting pipe 63) is preferably made of a soft material, such as rubber, which facilitates the installation of the water distribution pipe 4 and allows for more flexible installation positions. Similarly, the water pump inlet pipe 31 is also preferably made of a soft material, such as rubber, which facilitates the installation of the water pump 3 and allows for more flexible installation positions.

[0033] The toilet flushing device of this embodiment can adopt the following toilet flushing method, which specifically includes the following steps: In the S1 brush ring flushing step, the circuit board controls the water pump to run at a first preset power for a predetermined time. During this stage, due to the obstruction of the water seal at the bottom of the toilet bowl, the water flow from the lower flushing port 12 needs to overcome the water pressure at the water seal to flow out. Therefore, the water mainly flows out from the unobstructed upper flushing port 11 to flush the inner wall of the toilet bowl. It is better to control the flow rate of the lower flushing port 12 to less than 0.5L / s. In the S2 main flushing step, the circuit board controls the water pump to run at a second preset power for a predetermined time. During this stage, water flows out from both the upper flushing port 11 and the lower flushing port 12. Since the minimum flow cross-sectional area of ​​the upper flushing water path is smaller than that of the lower flushing water path, the pipe resistance of the upper flushing water path is significantly greater than that of the lower flushing water path in this state. Consequently, the water flow is mainly diverted to the lower flushing port 12 through the second diversion port 46. The flow rate of the lower flushing port 12 is greater than that of the upper flushing port, thus achieving the main flushing. In the S3 water seal replenishment step, the circuit board controls the water pump to run at a first preset power for a predetermined time. During this stage, water can flow out from the upper flushing port 11 and the lower flushing port 12 respectively to replenish the water stored at the bottom of the toilet bowl and achieve a water seal.

[0034] Second embodiment (the water distribution pipe is a four-way pipe) Please refer to Figures 6-10 The toilet flushing device provided in the second preferred embodiment of the present invention differs from the first embodiment mainly in that, in this embodiment, the toilet flushing device further includes a functional water component 5, and the water distribution pipe 4 further includes a third water outlet 44. That is, the water distribution pipe 4 is a four-way pipe. The water inlet of the functional water component 5 and the third water outlet 44 are connected through a fourth connecting pipe 64. A third diversion port 47 is also formed inside the water distribution pipe 4. The water flow from the water inlet 41 is connected to the third water outlet 44 through the third diversion port 47. The third diversion port 47 is set on the bottom wall of the water distribution pipe 4 and is located upstream of the first diversion port 45 and the second diversion port 46. The water path from the third diversion port 47 to the water inlet of the functional water component 5 is the functional water path.

[0035] The toilet flushing device also has a functional water-use mode. In this mode, the circuit board controls the power of the water pump 3 to a third preset value, which is less than the first preset value. This ensures that the water flow from the inlet 41 of the water distribution pipe 4 preferentially flows through the third diversion port 47 and then out of the third outlet 44. The principle is that when the power of the water pump 3 is sufficiently low, the pumped water flow is very small. Since the third diversion port 47 is located on the bottom wall of the water distribution pipe 4 and upstream of the first diversion port 45 and the second diversion port 46, the very small flow of water slowly flows from the third outlet 44 to the functional water-use component 5, while the upper flush port 11 and the lower flush port 12 show virtually no water flow. It can be understood that in this state, the water distribution pipe 4 is not fully filled.

[0036] In this embodiment, the first preset value is 20%-30%, the second preset value is 40%-60%, and the third preset value is 16%-18%. The minimum flow cross-sectional area of ​​the upper flushing water path: the minimum flow cross-sectional area of ​​the lower flushing water path: the minimum flow cross-sectional area of ​​the functional water path = 3:4:1. This design can further effectively ensure that, under functional water use conditions, the flow rates of both the lower flushing port 12 and the upper flushing port 11 are zero, and all the water pumped by the pump 3 is used for the functional water use component 5.

[0037] In this embodiment, the diameter of the lower flushing port 12 is 10mm-20mm, the diameter of the upper flushing port 11 is 5mm-8mm, and the diameter of the water inlet is 3mm-8mm. This design can further effectively ensure that the flow rate of both the lower flushing port 12 and the upper flushing port 11 is zero when in functional water use mode, and all the water pumped by the water pump 3 is used for the functional water use component 5.

[0038] In this embodiment, the inner diameter of the inlet 41 of the water distribution pipe 4 is 24-25mm, the inner diameter of the first outlet 42 is 16-18mm, the inner diameter of the second outlet 43 is 24-25mm, and the inner diameter of the third outlet 44 is 6-8mm.

[0039] In this embodiment, the water distribution pipe 4 is a four-way pipe, that is, it is provided with four outlets: inlet 41, first outlet 42, second outlet 43, and third outlet 44.

[0040] In this embodiment, the functional water-using component 5 is a foaming component, which has a water inlet and a foaming mixing chamber connected to the water inlet. It is understood that the functional water-using component 5 can also be other water-requiring parts on the toilet, such as a spray deodorizing component or a negative ion generating component.

[0041] Third embodiment (the water distribution pipe is a four-way pipe) Please refer to Figures 11-12 The toilet flushing device provided in the third preferred embodiment of the present invention differs from that in the second embodiment mainly in the specific structure of the water distribution pipe 4. In this embodiment, the inner diameter of the water distribution pipe 4 corresponding to the third diversion port 47 is D1 (e.g., Figure 12 As shown in the diagram, the inner diameter of the inlet 41 is D2, and the inner diameter of the second outlet 42 is D3, where D1 < D2 and D1 < D3. A baffle plate 48 is also provided between the third diversion port 47 and the second diversion port 46. Compared with the second embodiment, this arrangement ensures that when the water pump 3 operates at a third preset power (low power), all water can flow through the third diversion port 47 and out through the third outlet 44 to the functional water component 5, instead of flowing out through the first outlet 42 and the second outlet 43, resulting in better performance. Of course, it should be noted that if the functional water component 5 is already full of water, the water can still overflow the baffle plate 48 and flow to the first outlet 42 and the second outlet 43.

[0042] It should be noted that the brush ring flushing state of the present invention refers to the water flow mainly flowing out from the upper flushing port to flush the inner wall of the toilet bowl. In this state, the flow rate of the lower flushing port can be zero or a small amount of water can flow out. The main flushing state of the present invention refers to the water flow rate being increased compared to the brush ring flushing state, with water flowing out from both the upper and lower flushing ports simultaneously. In this state, the flow rate of the lower flushing port is increased compared to the brush ring flushing state.

[0043] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A toilet flushing device, comprising a toilet body, a water tank, a water pump, a water distribution pipe, and a circuit board, wherein the toilet body has an upper flushing port and a lower flushing port positioned below the upper flushing port, the water distribution pipe includes an inlet, a first outlet, and a second outlet, the inlet being connected to the outlet of the water pump via a first connecting pipe, the first outlet being connected to the upper flushing port via a second connecting pipe, the second outlet being connected to the lower flushing port via a third connecting pipe, the inlet of the water pump being connected to the water tank, and the circuit board being electrically connected to the water pump to control the opening and closing of the water pump and its power, characterized in that: The water distribution pipe has a first branch port and a second branch port. The water flow from the inlet is connected to the first outlet through the first branch port, and the water flow from the inlet is connected to the second outlet through the second branch port. The water path from the first branch port to the upper flushing port is the upper flushing water path, and the water path from the second branch port to the lower flushing port is the lower flushing water path. The minimum flow cross-sectional area of ​​the upper flushing water path is smaller than the minimum flow cross-sectional area of ​​the lower flushing water path. The toilet flushing device has a brush ring flushing state and a main flushing state. In the brush ring flushing state, the circuit board controls the power of the water pump to a first preset value so as to control the flow rate of the upper flushing port to be greater than the flow rate of the lower flushing port. In the main flushing state, the circuit board controls the power of the water pump to a second preset value so as to control the flow rate of the lower flushing port to be greater than the flow rate of the upper flushing port, wherein the second preset value is greater than the first preset value.

2. The toilet flushing device according to claim 1, characterized in that, In the brush ring rinsing state, the flow rate of the lower rinsing port is less than 0.5 L / s, and the shape of the lower rinsing port is circular.

3. The toilet flushing device according to claim 1, characterized in that, The first preset value is 20%-30%, and the second preset value is 40%-60%; the diameter of the lower flushing port is 10mm-20mm, and the diameter of the upper flushing port is 5mm-8mm.

4. The toilet flushing device according to claim 1, characterized in that, The toilet flushing device also includes a functional water component, and the water distribution pipe also includes a third water outlet. The water inlet of the functional water component is connected to the third water outlet through a fourth connecting pipe. A third diversion port is also formed inside the water distribution pipe. The water flow from the inlet is connected to the third water outlet through the third diversion port. The third diversion port is located on the bottom wall of the water distribution pipe and is upstream of the first diversion port and the second diversion port. The water path from the third diversion port to the water inlet of the functional water component is the functional water path. The toilet flushing device also has a functional water use state. In the functional water use state, the circuit board controls the power of the water pump to a third preset value, and the third preset value is less than the first preset value, so that the water flow from the inlet of the water distribution pipe flows out from the third outlet after passing through the third diversion port first.

5. The toilet flushing device according to claim 4, characterized in that, The first preset value is 20%-30%, the second preset value is 40%-60%, the third preset value is 16%-18%, and the minimum flow cross-sectional area of ​​the upper flushing water path: the minimum flow cross-sectional area of ​​the lower flushing water path: the minimum flow cross-sectional area of ​​the functional water path = 3:4:

1.

6. The toilet flushing device according to claim 4, characterized in that, The diameter of the lower flushing port is 10mm-20mm, the diameter of the upper flushing port is 5mm-8mm, and the diameter of the water inlet is 3mm-8mm.

7. The toilet flushing device according to claim 4, characterized in that, The water inlet of the water distribution pipe has an inner diameter of 24-25mm, the first outlet has an inner diameter of 16-18mm, the second outlet has an inner diameter of 24-25mm, and the third outlet has an inner diameter of 6-8mm.

8. The toilet flushing device according to claim 4, characterized in that, The inner diameter of the water distribution pipe corresponding to the third diversion port is D1, the inner diameter of the water inlet is D2, and the inner diameter of the second water outlet is D3. D1 < D2 and D1 < D3. A water baffle is also provided between the third diversion port and the second diversion port.

9. A toilet flushing method, characterized in that, The toilet flushing device according to any one of claims 1-8 includes the following steps: S1 brush ring rinsing step, causing the circuit board to control the water pump to run at a first preset power for a predetermined time; S2 main flushing step, causing the circuit board to control the water pump to run at a second preset power for a predetermined time; The S3 water seal replenishment step enables the circuit board to control the water pump to run at a first preset power for a predetermined time.

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