Closestool flushing system and flushing control method thereof

Abstract

The invention provides a closestool flushing system and a flushing control method thereof.The closestool flushing control method comprises the steps that when a closestool is flushed, a water pump is started, the water pump pumps water in a water tank to a brush ring water path, the water flows into a urinal of the closestool from an outlet of the brush ring water path, and in the starting process of the water pump, the water in the water tank flows into the urinal of the closestool; and the water pump is controlled to be started in a staged speed increasing mode, so that the rotating speed of the water pump is increased to the preset rotating speed in a staged mode. The invention further provides a closestool flushing system adopting the closestool flushing control method. By the adoption of the technical scheme, the problems of water vapor impact sound and water flow splashing occurring in the brush ring waterway in the starting process of the water pump can be effectively avoided or reduced, and user experience is better.

Description

Technical Field

[0001] The invention relates to the technical field of toilets, and in particular to a toilet flushing system and a flushing control method thereof. Background Art

[0002] Some existing toilet flushing systems have adopted the technology of using a water pump to flush the toilet. The toilet flushing system generally includes a toilet, a water tank, a water pump, a flushing waterway and a control panel. The water pump is used to pump the water in the water tank into the toilet bowl through the flushing waterway. The control panel is electrically connected to the water pump to control the start and shut down of the water pump. After receiving the toilet flushing instruction, the control panel turns on the water pump so that the water pump pumps the water in the water tank into the flushing waterway and flows into the toilet bowl from the outlet of the flushing waterway to realize toilet flushing. The flushing waterway is generally provided with two ways, one is the brush ring waterway and the other is the jet waterway. The water delivered by the water pump switches to flow to the brush ring waterway and the jet waterway. Among them, the outlet of the brush ring waterway is located at the upper part of the toilet bowl and is connected to the outside air, and is used to flush the inner wall of the toilet bowl; the outlet of the jet waterway is located at the lower part of the toilet bowl, and is used to spray water on the bottom of the toilet bowl so that the sewage pipe produces a siphon effect. Summary of the invention

[0003] When flushing an existing toilet, the water pump is started either directly by hard starting (i.e., the speed of the water pump reaches the maximum speed directly at the moment of starting) or by quick soft starting (i.e., the speed of the water pump increases to the maximum speed in a smooth curve within a short period of time after starting). The existing water pump direct hard starting and quick soft starting methods both have the following two problems: (1) Since the outlet of the brush ring water channel is located at the upper part of the toilet bowl and is connected to the outside air, air is accumulated in the brush ring water channel when the toilet is not flushed, and there is an air accumulation phenomenon. Due to the quick start of the water pump, the initial outflow of the water pump and the air accumulated in the brush ring water channel will collide in the brush ring water channel, resulting in a "bang" sound of water and air collision in the brush ring water channel, which is noisy and has a poor user experience; (2) Due to the water pressure at the front end of the water pump, it is easy to form a negative water hammer effect in the water channel when the water pump is turned on, resulting in excess performance at the moment of starting the water pump, and splashing of water out of the brush ring water channel, which has a poor user experience.

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a toilet flushing system and a flushing control method thereof, which can effectively avoid or reduce the water vapor impact sound and water splashing problems in the brush circle water channel during the water pump startup process.

[0005] To achieve the above-mentioned purpose, one of the technical solutions adopted by the present invention is to provide a toilet flushing control method, including: when flushing the toilet, turning on the water pump, the water pump pumps water in the water tank to the brush ring water channel, and the water flows into the toilet bowl from the outlet of the brush ring water channel. During the starting process of the water pump, the water pump is controlled to start in stages, so that the speed of the water pump is increased in stages to a predetermined speed.

[0006] In some preferred embodiments, the staged speed-up start is a step-by-step speed-up start, so that the speed of the water pump is increased in steps to a predetermined speed. The step-by-step speed-up start means that when the speed of the water pump increases to one of the step values, it continues to run at the step value for a predetermined period of time.

[0007] In some preferred embodiments, during the starting process of the water pump, the water pump is controlled to perform a step-by-step speed-up start, so that the speed of the water pump is increased in steps to a predetermined speed, specifically including: during the starting process of the water pump, the speed of the water pump is controlled to increase from 0 to a first speed within a first time range, and continuously run at the first speed; after the water pump has been running at the first speed for a second time period, or when water is detected flowing out of the outlet of the brush circle water channel, or when it is detected that the gas pressure in the brush circle water channel is less than a predetermined value, the speed of the water pump is controlled to increase from the first speed to the second speed within a third time range.

[0008] In some preferred embodiments, during the start-up process of the water pump, the rotation speed of the water pump increases in a smooth curve, or increases in an undulating curve, or increases in a straight line at each speed-up stage.

[0009] In some preferred embodiments, two adjacent speed-up stages of the water pump are continuous, and the speed-up rates of the two adjacent speed-up stages are different.

[0010] In some preferred embodiments, when the rotation speed of the water pump increases to the predetermined rotation speed, the brush circle water channel is in a full water state.

[0011] To achieve the above-mentioned purpose, the second technical solution adopted by the present invention is to provide a toilet flushing system, including a toilet, a water tank, a water pump, a brush ring water channel and a control panel, wherein the water pump is used to pump the water in the water tank into the toilet bowl through the brush ring water channel, and the control panel is electrically connected to the water pump to control the start and stop of the water pump. After receiving the toilet flushing instruction, the control panel turns on the water pump so that the water pump pumps the water in the water tank into the brush ring water channel and flows into the toilet bowl from the outlet of the brush ring water channel. The toilet flushing system adopts the toilet flushing control method described in any of the above items, and during the startup process of the water pump, the control panel controls the water pump to start up in stages, so that the speed of the water pump is increased in stages to a predetermined speed.

[0012] Some preferred embodiments further include a liquid detection device, which is arranged at the outlet of the brush circle water channel. When water is detected flowing out of the outlet of the brush circle water channel, the control board is used to send a speed increase signal to the control board, and the control board then controls the speed of the water pump from the first speed to the second speed.

[0013] Some preferred embodiments further include a gas detection device, which is arranged in the brush circle water channel and is used to send a speed increase signal to the control board when it detects that the gas pressure in the brush circle water channel is less than a predetermined value. The control board then controls the speed of the water pump from the first speed to the second speed.

[0014] In some preferred embodiments, a sound detection sensor is further included, and the control board controls the rotation speed of the water pump according to the sound detection signal sent by the sound detection sensor.

[0015] In some preferred embodiments, it also includes a switching valve arranged on the brush ring water circuit and a jet water circuit connected to the switching valve. The toilet bowl has a water seal, the outlet of the brush ring water circuit is located above the water seal, and the outlet of the jet water circuit is located below the water seal. The inlet of the water pump is connected to the outlet of the water tank, and the outlet of the water pump is connected to the inlet of the switching valve. The first outlet of the switching valve is connected to the outlet of the brush ring water circuit, and the second outlet of the switching valve is connected to the outlet of the jet water circuit. The control panel controls the inlet of the switching valve to switch between the first outlet and the second outlet. In the initial stage of starting the water pump for flushing the toilet, the switching valve is in a state where the inlet of the switching valve is connected to the first outlet. The water pump is arranged in the water tank, and the water pump is a variable frequency pump.

[0016] Compared with the prior art, the present invention has the following beneficial effects: During the starting process of the water pump, the present invention controls the water pump to start at a higher speed in stages, so that the rotation speed of the water pump is increased in stages to a predetermined rotation speed. In this way, on the one hand, by controlling the water pump to start at a higher speed in stages, the water pump can be driven at a lower power to reach a lower rotation speed first, so as to generate a small stream of water flowing slowly from the brush circle water channel. During the flow of water, the gas originally gathered in the brush circle water channel will be squeezed out of the pipeline by the water flow, and then the power is increased to make the water pump run at a higher rotation speed, thereby solving the problem of large collision sound between gas and water flow caused by instantaneous high power driving the water pump to run at a high rotation speed in the prior art, and bringing better user experience. On the other hand, by controlling the water pump to start at a higher speed in stages, the negative water hammer effect caused by instantaneous high power driving the water pump to run at a high rotation speed in the prior art can be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] in: Figure 1 is a relationship diagram between the time and the water pump speed of the water pump starting process of the toilet flushing control method according to the first embodiment of the present invention; Figure 2 It is one of the flow charts of the water pump starting process of the toilet flushing control method according to the first embodiment of the present invention; Figure 3 This is a second flow chart of the water pump starting process of the toilet flushing control method according to the second embodiment of the present invention; Figure 4 is a relationship diagram between the time and the water pump speed of the water pump starting process of the toilet flushing control method according to the third embodiment of the present invention; Figure 5 is a flow chart of a water pump starting process of a toilet flushing control method according to a third embodiment of the present invention; Figure 6 is a schematic structural diagram of a toilet flushing system according to a fourth embodiment of the present invention; The reference numerals in the figure are: 1-water pump; 2-water tank; 3-switching valve; 4-brush ring water circuit; 5-jet water circuit; 6-first pipeline; 7-second pipeline; 8-third pipeline. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The present invention provides a toilet flushing control method, comprising: when flushing a toilet (not shown), starting a water pump, the water pump pumps water in a water tank to a brush ring water path, and the water flows from the outlet of the brush ring water path into a toilet bowl (not shown). During the start-up process of the water pump, the water pump is controlled to start up in stages, so that the speed of the water pump is increased in stages to a predetermined speed.

[0021] The definition of "water pump startup process" here means: the process of the water pump speed increasing from 0 to 100% of the predetermined speed, excluding the working process of the water pump after reaching 100% of the predetermined speed. The predetermined speed is the speed of the water pump during normal operation after the water pump startup process is completed. The predetermined speed can be the rated speed of the water pump or less than the rated speed of the water pump.

[0022] The "brush ring water channel" defined here means: a water channel used to flush the inner wall surface of the toilet bowl, and the outlet of the brush ring water channel is connected to the outside air.

[0023] By controlling the water pump to start up in stages during the start-up process of the water pump, the speed of the water pump is increased to a predetermined speed in stages. In this way, on the one hand: by controlling the water pump to start up in stages, the water pump can be driven at a lower power to reach a lower speed first, generating a small stream of water flowing slowly from the brush circle water channel. During the flow of water, the gas in the brush circle water channel will be squeezed out of the pipeline by the water flow, and then the power is increased to make the water pump run at a higher speed, thereby solving the problem of large collision noise caused by the gas and water flow caused by the instantaneous high power driving the water pump to run at a high speed in the prior art, and bringing better user experience; on the other hand; by controlling the water pump to start up in stages, the negative water hammer effect caused by the instantaneous high power driving the water pump to run at a high speed in the prior art can be effectively solved.

[0024] Embodiment 1 (the water pump is started by step-by-step speed increase): See also Figure 1 , Figure 2 and Figure 6 The present invention provides a toilet flushing control method according to the first embodiment. In this embodiment, the staged speed-up start is specifically a step-by-step speed-up start, so that the speed of the water pump 1 is increased step by step to a predetermined speed. The step-by-step speed-up start means that when the speed of the water pump 1 increases to one of the step values, it continues to run at the step value for a predetermined period of time.

[0025] In this embodiment, see Figure 1 During the start-up process of the water pump 1, the water pump 1 is controlled to start in a step-by-step speed-up manner, so that the speed of the water pump 1 is increased in a step-by-step manner to a predetermined speed, specifically including: during the start-up process of the water pump 1, the speed of the water pump 1 is controlled to increase from 0 to a first speed (the first speed is taken as 30% of the predetermined speed as an example) within a first time length (i.e., t1), and the water pump 1 is continuously operated at the first speed; after the water pump 1 continuously operates at the first speed for a second time length (i.e., t2-t1), the speed of the water pump 1 is controlled to increase from the first speed to a second speed (the second speed is taken as 100% of the predetermined speed as an example) within a third time length (i.e., t3-t2).

[0026] See also Figure 2 The toilet flushing control method of this embodiment specifically includes the following steps: S1: The control panel (not shown) of the toilet determines whether to perform toilet flushing. If yes, continue to step S2. If no, return to step S1. S2: Control the speed of the water pump to increase from 0 to 30% of the predetermined speed within the first time duration t1 (taking 0.5 seconds as an example); S3: the water pump runs at a predetermined speed of 30% for a second time period t2-t1. The preferred value of the second time period t2-t1 can be obtained through testing. The preferred value of the second time period t2-t1 depends on parameters such as the length and diameter of the brush circle water channel. S4: After the water pump runs at 30% of the predetermined speed for the second time t2-t1, the speed of the water pump is controlled to increase from 30% of the predetermined speed to 100% of the predetermined speed within a third time t3-t2 (taking 1.5 seconds as an example).

[0027] When the speed of the water pump increases from 0 to 100% of the preset speed, the starting process of the water pump is completed.

[0028] In this embodiment, preferably, when the rotation speed of the water pump 1 increases to a predetermined rotation speed, the brush circle water channel 4 is in a full water state.

[0029] The predetermined speed may be the rated speed of the water pump or may be less than the rated speed. Assuming that the rated speed of the water pump of this embodiment is 1400 rpm, the predetermined speed may be 1000 rpm, then 30% of the predetermined speed is 300 rpm, and 100% of the predetermined speed is 1000 rpm. After the water pump completes its own startup process, it will perform normal flushing of the toilet at the predetermined speed of 1000 rpm.

[0030] Embodiment 2 (the water pump is started by step-by-step speed increase): See also Figure 1 , Figure 3 and Figure 6The toilet flushing control method of the second embodiment provided by the present invention is different from the first embodiment in that: Figure 1 In the first embodiment, the second time length t2-t1 is a fixed value, which can be obtained according to the brush ring water channel test of different toilets. The second time length t2-t1 selected for different models of toilets may be different; and in this embodiment, Figure 1 The second time duration t2-t1 is not fixed, and depends on the time when water is detected to flow out of the outlet of the brush circle water channel.

[0031] In the present embodiment, during the starting process of the water pump 1, the water pump 1 is controlled to perform a step-by-step speed-up start, so that the speed of the water pump 1 is increased in steps to a predetermined speed, specifically including: during the starting process of the water pump 1, the speed of the water pump 1 is controlled to increase from 0 to a first speed within a first time range, and continuously run at the first speed; when water is detected flowing out from the outlet of the brush circle water channel 4, the speed of the water pump 1 is controlled to increase from the first speed to the second speed within a third time range.

[0032] For details, see Figure 1 During the start-up process of the water pump 1, the water pump 1 is controlled to start in a step-by-step speed-up manner, so that the speed of the water pump 1 is increased in a step-by-step manner to a predetermined speed, specifically including: during the start-up process of the water pump 1, the speed of the water pump 1 is controlled to increase from 0 to a first speed (the first speed is taken as 30% of the predetermined speed as an example) within a first time length (i.e., t1), and the water pump 1 is continuously operated at the first speed; when water is detected to flow out from the outlet of the brush circle water channel 4 (at this time, the water pump 1 has been running at the first speed for a second time length t2-t1), the speed of the water pump 1 is controlled to increase from the first speed to a second speed (the second speed is taken as 100% of the predetermined speed as an example) within a third time length (i.e., t3-t2). Figure 1 In the figure, the water pump 1 enters the working process at 100% of the predetermined speed after t3, and the working process after t3 does not belong to the starting process of the water pump 1 referred to in this article.

[0033] See also Figure 3 The toilet flushing control method of this embodiment specifically includes the following steps: S1: The control panel (not shown) of the toilet determines whether to perform toilet flushing. If yes, continue to step S2. If no, return to step S1. S2: Control the speed of the water pump to increase from 0 to 30% of the predetermined speed within the first time duration t1 (taking 0.5 seconds as an example); S3: the water pump runs at a predetermined speed of 30%, and detects whether water flows out from the outlet of the brush circle water channel 4. If so, continue to step S4, if not, return to step S3; S4: within a third time period t3-t2 (taking 1.5 seconds as an example), the rotation speed of the water pump is controlled to increase from 30% of the predetermined rotation speed to 100% of the predetermined rotation speed.

[0034] When the speed of the water pump increases from 0 to 100% of the preset speed, the starting process of the water pump is completed.

[0035] Embodiment 3 (the water pump is started by non-step-by-step speed increase): See also Figure 4 , Figure 5 and Figure 6 The third embodiment of the present invention provides a toilet flushing control method, which is different from the first and second embodiments in that the staged speed-up start of the first and second embodiments adopts a step-by-step speed-up start, that is, there is a uniform speed section between two adjacent speed-up sections. Figure 1 , the 0-t1 section and the t2-t3 section are two adjacent speed-up sections, and the t2-t1 section is a uniform speed section; and the staged speed-up start of this embodiment adopts that the two adjacent speed-up stages are continuous ( Figure 4 In the example, t4 is the turning point of two adjacent speed-up stages), and the speed-up rates of the two adjacent speed-up stages are different. In order to distinguish the step-by-step speed-up start-up from the first and second embodiments, the start-up mode of this embodiment is named as non-step-by-step speed-up start-up.

[0036] See also Figure 4 It can be seen that in the first speed-up stage (0-t4, indicated by the oblique solid straight line), the speed-up rate of the water pump is relatively small, and in the second speed-up stage (t4-t5), the speed-up rate of the water pump is significantly larger. The water pump of this embodiment adopts a starting method with two speed-up rates that vary significantly, and the two speed-up stages are continuous. Figure 4 In the figure, the water pump 1 enters the working process at 100% of the predetermined speed after t5, and the working process after t5 does not belong to the starting process of the water pump 1 referred to in this article.

[0037] Continue to see Figure 4 During the startup of the water pump 1, the speed of the water pump 1 can be increased in a straight line (0-t4 segment, as shown by the oblique solid straight line), or increased in a curve smoothly (0-t4 segment, as shown by the dotted curve), or increased in an undulating curve (0-t4 segment, as shown by the solid wavy curve). Of course, in addition to the above three speed increase methods, other speed increase methods can also be used. Similarly, in the t4-t5 segment of this embodiment, as well as the 0-t1 segment and t2-t3 of the above-mentioned embodiments 1 and 2, the above three speed increase methods can also be used, and are not limited to the straight oblique speed increase.

[0038] See also Figure 5 The toilet flushing control method of this embodiment specifically includes the following steps: S1: The control panel (not shown) of the toilet determines whether to perform toilet flushing. If yes, continue to step S2. If no, return to step S1. S2: Control the speed of the water pump from 0 to 30% of the preset speed within the time range of t4; S3: controlling the speed of the water pump to increase from 30% of the predetermined speed to 100% of the predetermined speed within the time range of t5-t4; When the speed of the water pump increases from 0 to 100% of the preset speed, the starting process of the water pump is completed. Embodiment 4:

[0039] See also Figure 6 The present embodiment provides a toilet flushing system, including a toilet (not shown), a water tank 2, a water pump 1, a brush ring water path 4 and a control panel (not shown). The water pump 1 is used to pump the water in the water tank 2 into the toilet bowl through the brush ring water path 4 to flush the inner wall surface of the toilet bowl. The control panel is electrically connected to the water pump 1 to control the start and stop of the water pump 1. After receiving the toilet flushing instruction, the control panel turns on the water pump 1 so that the water pump 1 pumps the water in the water tank 2 into the brush ring water path 4 and flows into the toilet bowl from the outlet of the brush ring water path 4. The toilet flushing system adopts any of the toilet flushing control methods described above. During the start-up process of the water pump 1, the control panel controls the water pump 1 to start up in stages, so that the speed of the water pump 1 is increased in stages to a predetermined speed.

[0040] The water pump 1 is preferably disposed in the water tank 2, and the water pump 1 is a variable frequency pump.

[0041] The toilet flushing system may include a liquid detection device, which is disposed at the outlet of the brush ring water channel 4, and is used to send a speed increase signal to the control board when detecting that water flows out of the outlet of the brush ring water channel 4, and the control board then controls the speed of the water pump 1 to increase from the first speed to the second speed. The liquid detection device may be a flow detection device, a capacitive sensing device, an infrared sensing device, etc., as long as it can send a signal to the control board when detecting that water flows out of the outlet of the brush ring water channel 4. At this time, the toilet flushing system adopts the toilet flushing control method of the second embodiment described above.

[0042] The toilet flushing system may also include a gas detection device, which may be optionally arranged in the brush ring water channel 4, and is used to send a speed increase signal to the control board when it detects that the gas pressure in the brush ring water channel 4 is less than a predetermined value. The control board then controls the speed of the water pump 1 from the first speed to the second speed.

[0043] The toilet flushing system may further include a sound detection sensor, and the control board controls the rotation speed of the water pump 1 according to a sound detection signal sent by the sound detection sensor.

[0044] The toilet flushing system may not be provided with the above-mentioned liquid detection device, gas detection device, sound detection sensor and other detection devices. When no detection device is provided, it is suitable for adopting the flushing control methods of the above-mentioned embodiments 1 and 3; when the toilet flushing system is provided with a detection device, the flushing control method of the above-mentioned embodiment 2 may be adopted, and the speed of the water pump is controlled to increase from the first speed to the second speed only when the corresponding object or parameter is detected by the detection device. It can be understood that the detection device is not limited to the above three types, and other common detection devices may also be adopted.

[0045] In this embodiment, a switching valve 3 is provided on the brush ring water path 4 and a jet water path 5 connected to the switching valve 3. A water seal is provided in the toilet bowl, the outlet of the brush ring water path 4 is located above the water seal, and the outlet of the jet water path 5 is located below the water seal. The inlet of the water pump 1 is connected to the outlet of the water tank 2 through the first pipeline 6, the outlet of the water pump 1 is connected to the inlet of the switching valve 3 through the second pipeline 7, the first outlet of the switching valve 3 is connected to the outlet of the brush ring water path 4 through the third pipeline 8, and the second outlet of the switching valve 3 is connected to the outlet of the jet water path 5 through the fourth pipeline, wherein the inner cavities of the second pipeline 7 and the third pipeline 8 together form the brush ring water path 4, and the inner cavity of the fourth pipeline forms the jet water path 5. The control panel controls the inlet of the switching valve 3 to be switched and connected to its first outlet and second outlet. In the initial stage of starting the water pump 1 for toilet flushing, the switching valve 3 is in a state where the inlet is connected to the first outlet. That is to say, during the startup of the water pump 1, the outlet of the water pump 1 is connected to the outlet of the brush circle water channel 4 through the switching valve 3.

[0046] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0047] Those skilled in the art can understand that the above-mentioned embodiments are specific examples of the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention. The present invention is described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A toilet flushing control method, comprising: When flushing the toilet, the water pump is turned on, and the water pump draws water from the water tank to the brush ring water channel, and the water flows into the toilet bowl from the outlet of the brush ring water channel. It is characterized in that during the starting process of the water pump, the water pump is controlled to start in stages, so that the speed of the water pump is increased in stages to a predetermined speed.

2. A toilet flushing control method according to claim 1, characterized in that: The staged speed-up start is a step-by-step speed-up start, so that the speed of the water pump is increased step by step to a predetermined speed. The step-by-step speed-up start means that when the speed of the water pump increases to one of the step values, it continues to run at the step value for a predetermined time.

3. A toilet flushing control method according to claim 2, characterized in that: During the starting process of the water pump, the water pump is controlled to start in a step-by-step manner so that the speed of the water pump is increased in steps to a predetermined speed, specifically including: during the starting process of the water pump, the speed of the water pump is controlled to increase from 0 to a first speed within a first time range, and continuously run at the first speed; after the water pump has been running at the first speed for a second time period, or when water is detected flowing out of the outlet of the brush circle water channel, or when the air pressure of the gas in the brush circle water channel is detected to be less than a predetermined value, the speed of the water pump is controlled to increase from the first speed to the second speed within a third time range.

4. A toilet flushing control method according to claim 2, characterized in that: During the start-up process of the water pump, the rotation speed of the water pump increases in a smooth curve, or increases in an undulating curve, or increases in a straight line in each speed-up stage.

5. A toilet flushing control method according to claim 1, characterized in that: Two adjacent speed-up stages of the water pump are continuous, and the speed-up rates of the two adjacent speed-up stages are different.

6. A toilet flushing control method according to claim 1, characterized in that: When the rotation speed of the water pump increases to the predetermined rotation speed, the brush circle water channel is in a full water state.

7. A toilet flushing system, comprising a toilet, a water tank, a water pump, a brush ring waterway and a control panel, wherein the water pump is used to pump water in the water tank into the toilet bowl through the brush ring waterway, the control panel is electrically connected to the water pump to control the start and stop of the water pump, and after receiving a toilet flushing instruction, the control panel turns on the water pump so that the water pump pumps water in the water tank into the brush ring waterway and flows into the toilet bowl from the outlet of the brush ring waterway, characterized in that: The toilet flushing system adopts the toilet flushing control method according to any one of claims 1 to 6. During the start-up process of the water pump, the control board controls the water pump to start up in stages, so that the speed of the water pump is increased in stages to a predetermined speed.

8. A toilet flushing system according to claim 7, characterized in that: It also includes a liquid detection device, which is arranged at the outlet of the brush circle water channel. When it detects that water flows out from the outlet of the brush circle water channel, it sends a speed increase signal to the control board, and the control board then controls the speed of the water pump to increase from a first speed to a second speed.

9. A toilet flushing system according to claim 7, characterized in that: It also includes a gas detection device, which is arranged in the brush circle water channel and is used to send a speed increase signal to the control board when it detects that the gas pressure in the brush circle water channel is less than a predetermined value. The control board then controls the speed of the water pump from the first speed to the second speed.

10. A toilet flushing system according to claim 7, characterized in that: It also includes a sound detection sensor, and the control board controls the rotation speed of the water pump according to the sound detection signal sent by the sound detection sensor.

11. A toilet flushing system according to claim 7, characterized in that: It also includes a switching valve arranged on the brush ring water path and a jet water path connected to the switching valve. A water seal is provided in the toilet bowl of the toilet. The outlet of the brush ring water path is located above the water seal, and the outlet of the jet water path is located below the water seal. The inlet of the water pump is connected to the outlet of the water tank, and the outlet of the water pump is connected to the inlet of the switching valve. The first outlet of the switching valve is connected to the outlet of the brush ring water path, and the second outlet of the switching valve is connected to the outlet of the jet water path. The control panel controls the inlet of the switching valve to be switched and connected to the first outlet and the second outlet. In the initial stage of starting the water pump for flushing the toilet, the switching valve is in a state where the inlet of the switching valve is connected to the first outlet. The water pump is arranged in the water tank, and the water pump is a variable frequency pump.

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