Flushing system of toilet and toilet

Abstract

The present application discloses a flushing system for a toilet, including a pump, a reversing valve 10, and a control unit. The time when the pump provides flushing water flow is divided into a first, a second, and a third time period. When in the second time period, the control unit outputs a control signal. The reversing valve forms a reversing chamber (122) and a water inlet pipeline (124), an upper flushing pipeline (126), and a lower flushing pipeline (128) that are respectively communicated with the reversing chamber. A reversing rotor (14) is provided in the reversing chamber, and after obtaining the control signal, the reversing rotor is controlled to switch from the normally closed position to the lower flushing position. When in the normally closed position, the water flow is introduced into the upper flushing pipeline, and when in the lower flushing position, the water flow is introduced into the lower flushing pipeline. An exhaust passage (129) that communicates the upper flushing pipeline and the lower flushing pipeline is formed in the reversing valve. When in the normally closed position, the air in the lower flushing pipeline will be discharged into the upper flushing pipeline through the exhaust passage due to the negative pressure caused by the water flow in the upper flushing pipeline. The above structure can reduce the flushing noise, and also provides a toilet.

Description

Technical Field

[0001] This application relates to a flushing system, and particularly to a flushing system for a toilet. This application also relates to a toilet having the above flushing system. Background Art

[0002] In the flushing system of an existing toilet, a pump in a water tank is connected to a reversing valve through a pipeline, and the reversing valve is respectively connected to an upper flushing pipe and a lower flushing pipe. The reversing valve can switch its position to make the flushing water flow provided by the pump flow into the upper flushing pipe or the lower flushing pipe. The water outlet end of the upper flushing pipe is directly connected to the outside to realize the flushing of the toilet wall. The water outlet end of the lower flushing pipe directly flushes water into the sewer pipe of the toilet and is generally sealed by the water stored in the toilet.

[0003] When the flushing system of an existing toilet flushes water, it will cause harsh flushing noise due to the air existing in the upper flushing pipe and the lower flushing pipe.

[0004] Application Content

[0005] In view of the above problems, this application discloses a flushing system for a toilet, which can significantly eliminate flushing noise.

[0006] This application also discloses a toilet having the above flushing system.

[0007] To achieve the above object, this application adopts the following technical solutions:

[0008] This application provides a flushing system for a toilet, which includes a pump, a reversing valve and a control unit. The pump can provide flushing water flow, and divides the time for providing a flushing water flow into a first time period S1, a second time period S2 and a third time period S3 in sequence. The control unit can output a control signal when the pump is in the second time period S2. The reversing valve is formed with a reversing chamber and an inlet pipeline, an upper flushing pipeline and a lower flushing pipeline respectively communicating with the reversing chamber. The inlet pipeline can be connected to the pump through a pipeline to obtain flushing water flow. The reversing chamber also has a reversing rotor. After obtaining the control signal, the reversing valve will control the reversing rotor to switch from a normally closed position to a lower flushing position. Among them, the reversing rotor in the normally closed position can introduce the water flow in the inlet pipeline into the upper flushing pipeline. The reversing rotor in the lower flushing position can introduce the water flow in the inlet pipeline into the lower flushing pipeline. And an exhaust passage communicating the upper flushing pipeline and the lower flushing pipeline can also be formed in the reversing valve. When the reversing rotor is in the normally closed position, the air in the lower flushing pipeline will be discharged into the upper flushing pipeline through the exhaust passage due to the negative pressure effect caused by the water flow in the upper flushing pipeline.

[0009] During the upward flushing process of the above structure, the Venturi effect is adopted. By utilizing the negative pressure that appears in the upward flushing pipeline, the air in the downward flushing pipeline and the downward flushing pipe is discharged into the upward flushing pipeline through the exhaust channel and then discharged. After switching to downward flushing, the water discharge time of the gas-liquid mixture can be reduced, and the water discharge noise caused by a large amount of air contained in the water discharge can be significantly eliminated.

[0010] In a schematic embodiment of the flushing system of a toilet, the pump is set with a first operating frequency P1 during a first time period S1, and there is also a first time point T1 within the first time period S1 of the pump. Within the first time period S1: From the start to the first time point T1, the operating frequency of the pump is controlled to gradually increase from 0 to the first operating frequency P1; from the first time point T1 to the end of the first time period S1, the operating frequency of the pump is controlled to remain at the first operating frequency P1.

[0011] In the above flushing system of the toilet, when flushing upward, the air in the upward flushing pipeline and the upward flushing pipe can be first discharged by using the slow water flow in the first stage, avoiding the formation of noise during upward flushing, and the Venturi effect is formed by using the fast water flow in the second stage to discharge the air in the downward flushing pipeline and the downward flushing pipe, avoiding the formation of noise during downward flushing.

[0012] In a schematic embodiment of the flushing system of a toilet, the pump is set with a second operating frequency P2 during a second time period S2, and there is also a second time point T2 within the second time period S2 of the pump. Within the second time period S2: From the end of the first time period S1 to the second time point T2, the operating frequency of the pump is controlled to gradually increase from the first operating frequency P1 to the second operating frequency P2; from the second time point T2 to the end of the second time period S2, the operating frequency of the pump is controlled to remain at the second operating frequency P2.

[0013] In the above flushing system of the toilet, when flushing upward, the remaining air in the downward flushing pipeline and the downward flushing pipe can be quickly discharged by using the relatively slow water flow in the first stage, avoiding the formation of noise during downward flushing, and the fast water flow in the second stage is used to ensure the downward flushing effect.

[0014] In a schematic embodiment of the flushing system of a toilet, when the reversing rotor is in the normally closed position, the gap between the reversing rotor and the inner wall of the reversing chamber forms an exhaust channel.

[0015] In a schematic embodiment of the flushing system of a toilet, the exhaust channel is an exhaust pipeline, and the exhaust pipeline penetrates through the pipe wall of the upward flushing pipeline to connect with the upward flushing pipeline, and penetrates through the pipe wall of the downward flushing pipeline to connect with the downward flushing pipeline.

[0016] In a schematic embodiment of the flushing system of a toilet, when the reversing rotor is in the normally closed position, the gap between the reversing rotor and the inner wall of the reversing chamber forms a liquid inlet channel of the water inlet pipeline connected to the downward flushing pipeline, and the liquid inlet channel allows liquid to enter the downward flushing pipeline.

[0017] The present application also relates to a toilet, which includes a water tank, the above-mentioned flushing system, an upper flushing pipe, and a lower flushing pipe. The pump can pump the water in the water tank to the water inlet pipeline of the reversing valve. The upper flushing pipe is connected to the upper flushing pipeline of the reversing valve, and the lower flushing pipe is connected to the lower flushing pipeline of the reversing valve.

[0018] When the above-mentioned toilet flushes water, the water outlet noise can be significantly eliminated. Description of the Drawings

[0019] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0020] Figure 1 A schematic structural diagram for explaining a schematic embodiment of the flushing system of the toilet.

[0021] Figure 2 An internal structural diagram for explaining a schematic embodiment of the reversing valve in the flushing system.

[0022] Figure 3 For explaining Figure 2 A working schematic diagram when the shown reversing rotor switches to the normally closed position.

[0023] Figure 4 For explaining Figure 2 A working schematic diagram when the shown reversing rotor switches to the lower flushing position.

[0024] Figure 5 A schematic diagram of the control method for explaining a schematic embodiment of the pump.

[0025] Figure 6 An internal structural diagram for explaining another schematic embodiment of the reversing valve in the flushing system.

[0026] Figure 7 An internal structural diagram for explaining yet another schematic embodiment of the reversing valve in the flushing system.

[0027] Figure 8 A schematic structural diagram for explaining a schematic embodiment of the toilet.

[0028] Reference Numeral Explanation:

[0029] 10 Reversing Valve

[0030] 122 Reversing Chamber

[0031] 124 Water Inlet Pipeline

[0032] 126 Upper flushing pipeline

[0033] 127 Liquid inlet channel

[0034] 128 Lower flushing pipeline

[0035] 129 Exhaust channel

[0036] 14 Reversing rotor

[0037] 20 Pump

[0038] 30 Water tank

[0039] 50 Control unit

[0040] 60 Upper flushing pipeline

[0041] 80 Lower flushing pipeline Specific implementation manners

[0042] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments of this application and the corresponding drawings. Apparently, the described embodiments are only a part rather than all of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0043] In this document, "schematic" means "serving as an example, instance or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or more advantageous technical solution.

[0044] To make the drawings concise, only the parts related to this application are schematically shown in each drawing, and they do not represent the actual structure of the product as a whole. Additionally, to make the drawings concise and easy to understand, in some drawings, for components with the same structure or function, only one of them is schematically illustrated, or only one of them is labeled.

[0045] The technical solutions provided by each embodiment of this application will be described in detail below in conjunction with the drawings.

[0046] Figure 1 A schematic structural diagram for illustrating a schematic implementation manner of a flushing system of a toilet. As Figure 1 shown by the solid lines in, the flushing system of the toilet includes a pump 20 and a reversing valve 10.

[0047] Among them, the pump 20 is generally arranged in the water tank 30 of the toilet. When completing a flushing operation, the pump 20 can pump out the water in the water tank 30 to form a flushing water flow and supply the flushing water flow to the reversing valve 10. The time for the pump 20 to provide a flushing water flow is, for example, 20 seconds, which can be divided into a first time period S1 of, for example, 7 seconds, a second time period S2 of, for example, 6 seconds, and a third time period S3 of, for example, 7 seconds in sequence.

[0048] The control unit 50 can monitor the working state of the pump 20, and the control unit 50 can output a control signal when the pump 20 is in the second time period S2. Only the structure of the control unit 50 is schematically shown in the figure. Those skilled in the art can understand that the control unit 50 can be an independent control circuit board or an electronic component integrated in the pump 20.

[0049] For the internal structure of the reversing valve 10, please refer to Figure 2 , Figure 2 the internal structure schematic diagram for explaining a schematic implementation manner of the reversing valve 10 in the flushing system. As Figure 2 shown, a reversing cavity 122 is formed inside the reversing valve 10, and an inlet water pipeline 124, an upper flushing pipeline 126, and a lower flushing pipeline 128 are also formed inside the reversing valve 10. The inlet water pipeline 124, the upper flushing pipeline 126, and the lower flushing pipeline 128 can be respectively communicated with the reversing cavity 122.

[0050] The reversing valve 10 is connected to the inlet water pipe 40 of the toilet through the inlet water pipeline 124 to obtain the flushing water flow provided by the pump 20. As Figure 1 shown, it is used to receive the flushing water pumped out by the pump 20 from the water tank 30. The reversing valve 10 is also connected to the upper flushing pipe 60 of the toilet through the upper flushing pipeline 126. The water outlet end of the upper flushing pipe 60 can direct the flushing water to the inner wall of the toilet to realize the flushing of the inner wall of the toilet. The reversing valve 10 is also connected to the lower flushing pipe 80 of the toilet through the lower flushing pipeline 128. The water outlet end of the lower flushing pipe 80 can directly flush the flushing water into the sewer pipeline of the toilet.

[0051] The reversing rotor 14 is arranged in the reversing cavity 122, and the reversing rotor 14 can be switched between a normally closed position and a lower flushing position. When the reversing rotor 14 is in the normally closed position, as Figure 3 shown, if there is a flushing water flow flowing in, the liquid in the inlet water pipeline 124 will be diverted to the upper flushing pipeline 126. After the reversing valve 10 receives the control signal output by the pump 20, the reversing rotor 14 will be switched from the normally closed position to the lower flushing position. As Figure 4 shown, when in the lower flushing position, the liquid in the inlet water pipeline 124 will be diverted to the lower flushing pipeline 128.

[0052] In addition, the reversing valve 10 can also form an exhaust passage 129 that connects the upper flushing pipeline 126 and the lower flushing pipeline 128. During Figure 3In the illustrated embodiment, when the commutation rotor 14 is in the normally closed position, there is a gap between the commutation rotor 14 and the inner wall of the commutation chamber 122, forming the above-mentioned exhaust passage 129.

[0053] When the pump 20 is not working, the commutation rotor 14 will remain in the normally closed position. At this time, the upflush pipeline 126 will be directly connected to the external air through the upflush pipe 60. The downflush pipeline 128 is communicated with the upflush pipeline 126 through the exhaust passage 129, and the water outlet end of the downflush pipe 80 connected to the downflush pipeline 128 is liquid-sealed. Therefore, the downflush pipe 80 and the downflush pipeline 128 are filled with air at this time.

[0054] When the pump 20 is started, the pump 20 starts to pump the water in the water tank 30 to the commutation valve 10. During the first time period S1 when the pump 20 is working, the commutation rotor 14 is held in the normally closed position. At this time, the upflush is first performed. As Figure 3 shown, the water flow flows in from the inlet pipeline 124, passes through the commutation chamber 122 and then flows out from the upflush pipeline 126. During the process of the water flow passing through the upflush pipeline 126, due to the relatively fast water flow velocity, the Venturi effect will be caused, resulting in a negative pressure in the upflush pipeline 126. Therefore, the water flow will not flow into the downflush pipeline 128 through the exhaust passage 129. Instead, the air in the downflush pipeline 128 will enter the upflush pipeline 126 from the downflush pipeline 128 through the exhaust passage 129 under the negative pressure of the upflush pipeline 126. See the dotted arrows in Figure 3 . Therefore, during the upflush process, the exhaust of the downflush pipeline 128 and the downflush pipe 80 will be realized. Until the pump 20 enters the second time period S2 of operation, the control unit 50 will output a control signal. After the commutation valve 10 obtains the control signal, it will switch the commutation rotor 14 from the closed position to the downflush position to perform the downflush. See Figure 4 . At this time, a large amount of air in the downflush pipeline 128 and the downflush pipe 80 has been exhausted, and the downflush pipeline 128 and the downflush pipe 80 are in a negative pressure state, which will further accelerate the flow velocity of the downflush water flow, quickly exhaust the remaining air in the downflush pipeline 128 and the downflush pipe 80, greatly reduce the water outlet time of the gas-liquid mixture, and significantly eliminate the water outlet noise during the downflush water outlet.

[0055] In Figure 5 the illustrated embodiment, the pump 20 is set with a first operating frequency P1 during the first time period S1, and there is also a first time point T1 within the first time period S1 of the pump. The operating frequency of the pump is controlled according to the first time point T1. Specifically, the first time period S1 is divided into two stages: the first stage, from the start of flushing to the first time point T1, the operating frequency of the pump 20 is gradually increased from 0 to the first operating frequency P1; the second stage, from the first time point T1 to the end of the first time period S1, the operating frequency of the pump 20 is maintained at the first operating frequency P1.

[0056] In the above control method, during the upward flushing process, the water flow rate of the upward flushing is controlled by controlling the power of the pump 20, so that the water flow rate of the upward flushing gradually increases. In this way, the air in the upward flushing pipe 80 connected to the upward flushing pipeline 128 can be discharged first by using the slow water flow, avoiding the noise caused by too fast water flow rate when the air is not discharged. And after reaching the first time T1, for example, 2 seconds, it enters the second stage, and the power of the pump 20 is maintained at the operating frequency P1. At this time, the water flow rate is stable and fast enough to form a negative pressure in the upward flushing pipeline 126, so as to bring out the air in the downward flushing pipeline 128 through the exhaust passage 129.

[0057] In Figure 5 the shown embodiment, the pump 20 is set with a second operating frequency P2 in the second time period S2, and there is also a second time point T2 in the second time period S2 of the pump 20. The operating frequency of the pump is controlled according to the second time point T2. Specifically, the second time period S2 is divided into two stages: in the first stage, from the end of the first time period S1 to the second time point T2, the operating frequency of the pump 20 is gradually increased from the first operating frequency P1 to the second operating frequency P2; in the second stage, from the second time point T2 to the end of the second time period S2, the operating frequency of the pump 20 is maintained at the second operating frequency P2.

[0058] In the above control method, during the downward flushing process, the water flow rate of the downward flushing is controlled by controlling the power of the pump 20, so that the water flow rate of the downward flushing gradually increases. Similarly, the remaining air in the downward flushing pipe 80 connected to the downward flushing pipeline 128 is discharged first by using the relatively slow water flow, avoiding the noise caused by too fast water flow rate when the air is not discharged. And after reaching the first time T1, for example, 2 seconds, it enters the second stage, and the power of the pump 20 is maintained at the operating frequency P2, for example, the highest operating frequency. At this time, the water flow rate is stable and fast enough to ensure the downward flushing effect.

[0059] As described above, Figure 3 in the shown embodiment, the exhaust passage 129 is formed by the gap left between the commutation rotor 14 and the inner wall of the commutation cavity 122 when the commutation rotor 14 is in the normally closed position. However, according to different design requirements, other methods can also be used to set the exhaust passage 129. For example, refer to Figure 6 , as Figure 6 shown, the exhaust passage 129 is an independently arranged exhaust pipe, for example, a rubber pipe. The independently arranged exhaust pipe can penetrate through the wall of the upward flushing pipeline 126 to communicate with the upward flushing pipeline 126, and can penetrate through the wall of the downward flushing pipeline 128 to communicate with the downward flushing pipeline 128.

[0060] In Figure 2 , Figure 3 and Figure 4In the illustrated embodiment, the commutation chamber 122 may adopt a cylindrical cavity. The water inlet pipeline 124, the upper flushing pipeline 126, and the lower flushing pipeline 128 are respectively connected to the circumferential inner wall of the commutation chamber 122. The commutation chamber 122 adopting a cylindrical cavity is more convenient for the design and manufacture of the commutation rotor 14, and it is easier to design the positional relationship between the commutation rotor 14 and the inner wall of the commutation chamber 122 in the normally closed position, that is, it is more convenient for the design of the exhaust passage 129. Of course, according to different design requirements, the commutation chamber 122 can also be designed as a cavity of other shapes, such as a spherical cavity.

[0061] In Figure 2 , Figure 3 and Figure 4 In the illustrated embodiment, the included angle between the water inlet pipeline 124 and the upper flushing pipeline 126, and the included angle between the water inlet pipeline 124 and the lower flushing pipeline 128 are both designed as obtuse angles. This angle design can reduce the loss of water flow kinetic energy, ensure the water flow velocity of the upper flushing water and the lower flushing water. The faster the water flow velocity, the greater the negative pressure formed in the upper flushing pipeline 126 during the upper flushing process, and the more air can be discharged from the lower flushing pipeline 128. And during the lower flushing process, the faster the water flow velocity, the faster the remaining air in the lower flushing pipeline 128 can be discharged. Of course, the higher the water flow velocity, the better the flushing effect of the upper flushing water and the lower flushing water.

[0062] Similarly, in Figure 6 the illustrated embodiment, it is also possible to make the axial directions of the water inlet pipeline 124, the upper flushing pipeline 126, and the lower flushing pipeline 128 lie in the same plane, and the included angle between the water inlet pipeline 124 and the upper flushing pipeline 126, and the included angle between the water inlet pipeline 124 and the lower flushing pipeline 128 are both obtuse angles. The technical effect is similar to that above and will not be elaborated here.

[0063] Figure 7 The internal structure schematic diagram for explaining another schematic embodiment of the commutation valve 10 of the toilet. As Figure 7 shown, when the commutation rotor 14 is in the normally closed position, the gap between the commutation rotor 14 and the inner wall of the commutation chamber 122 forms a liquid inlet passage 127 that connects the water inlet pipeline 124 to the lower flushing pipeline 128, and the liquid inlet passage 127 allows liquid to enter the lower flushing pipeline 128. In Figure 7In the illustrated embodiment, when the reversing rotor 14 is in the normally closed position, the above-mentioned liquid inlet passage 127 is formed between one end on the left side of the reversing rotor 14 and the inner wall of the reversing chamber 122, and the above-mentioned exhaust passage 129 is formed between one end on the right side of the reversing rotor 14 and the inner wall of the reversing chamber 122. Under this design, during the upward flushing process, the water flow velocity in the upward flushing pipeline 126 is relatively fast, and the negative pressure formed by it will carry the air in the downward flushing pipeline 128 out through the exhaust passage 129. Since the reversing rotor itself has a certain flow resistance effect, the liquid in the water flow will flow into the downward flushing pipeline 128 through the liquid inlet passage 127. Because the downward flushing pipeline 128 and the downward flushing pipe 80 are in a liquid seal state at this time, the liquid flowing into the downward flushing pipeline 128 will further help the air in the downward flushing pipeline 128 and the downward flushing pipe 80 to be discharged into the upward flushing pipeline 126 through the exhaust passage 129, improving the efficiency and effect of discharging the air in the downward flushing pipeline 128 and the downward flushing pipe 80 during the upward flushing process. After changing from upward flushing to downward flushing, the water outlet time of the gas-liquid mixture can be further reduced, and the water outlet noise can be further eliminated.

[0064] The present application also provides a toilet, as Figure 8 shown, which includes a water tank, the above-mentioned flushing system, an upward flushing pipe 60 and a downward flushing pipe 80. Among them, the pump 20 can pump the water in the water tank to the water inlet pipeline 124 of the reversing valve 10, the upward flushing pipe 60 is connected to the upward flushing pipeline 126 of the reversing valve 10, and the downward flushing pipe 80 is connected to the downward flushing pipeline 128 of the reversing valve 10.

[0065] When the above-mentioned toilet flushes water, the water outlet noise can be significantly eliminated.

[0066] The above is only the specific embodiment of the present application. Under the above teaching of the present application, those skilled in the art can make other improvements or deformations on the basis of the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. Flushing system of a toilet, characterized in that, It includes: A pump (20) capable of providing a flushing water flow, and dividing the time for providing a single flushing water flow into a first time period S1, a second time period S2, and a third time period S3 in sequence; A control unit (50) capable of outputting a control signal when the pump is in the second time period S2; A reversing valve (10) in which a reversing chamber (122) is formed, and a water inlet pipe (124), an upper flushing pipe (126), and a lower flushing pipe (128) respectively communicating with the reversing chamber (122). The water inlet pipe (124) can be connected to the pump (20) through a pipe to obtain the flushing water flow; and a reversing rotor (14) is further provided in the reversing chamber (122). After obtaining the control signal, the reversing valve (10) will control the reversing rotor (14) to switch from a normally closed position to a lower flushing position. Among them, The reversing rotor (14) in the normally closed position can introduce the water flow in the water inlet pipe (124) into the upper flushing pipe; The reversing rotor (14) in the lower flushing position can introduce the water flow in the water inlet pipe (124) into the lower flushing pipe; And an exhaust passage (129) communicating the upper flushing pipe (126) and the lower flushing pipe (128) can be formed in the reversing valve (10). When the reversing rotor (14) is in the normally closed position, the air in the lower flushing pipe (128) will be discharged into the upper flushing pipe (126) through the exhaust passage (129) due to the negative pressure caused by the water flow in the upper flushing pipe (126). When the reversing rotor (14) is in the normally closed position, the gap between the reversing rotor (14) and the inner wall of the reversing chamber (122) forms the exhaust passage (129). The exhaust passage (129) is an exhaust pipe, and the exhaust pipe penetrates through the pipe wall of the upper flushing pipe (126) to communicate with the upper flushing pipe (126), and penetrates through the pipe wall of the lower flushing pipe (128) to communicate with the lower flushing pipe (128).

2. The flushing system according to claim 1, wherein The pump (20) is set with a first working frequency P1 in the first time period S1, and there is also a first time point T1 in the first time period S1 of the pump. In the first time period S1: From the start of flushing to the first time point T1, control the working frequency of the pump (20) to gradually rise from 0 to the first working frequency P1; From the first time point T1 to the end of the first time period S1, control the working frequency of the pump (20) to remain at the first working frequency P1.

3. The flushing system according to claim 2, wherein The pump (20) is set with a second working frequency P2 in the second time period S2, and there is also a second time point T2 in the second time period S2 of the pump. In the second time period S2: From the end of the first time period S1 to the second time point T2, control the pump (20) The operating frequency gradually rises from the first operating frequency P1 to the second operating frequency P2; From the second time point T2 to the end of the second time period S2, the operating frequency of the pump (20) is controlled to remain at the second operating frequency P2.

4. The flushing system according to claim 1, characterized in that, When the reversing rotor (14) is in the normally closed position, the gap between the reversing rotor (14) and the inner wall of the reversing chamber (122) forms a liquid inlet channel (127) for the water inlet pipe (124) to communicate with the lower flushing pipe, and the liquid inlet channel (127) allows liquid to enter the lower flushing pipe (128).

5. A toilet, comprising: A water tank (30); A flushing system according to any one of claims 1 to 4, wherein the pump (20) can pump water in the water tank into the water inlet pipe (124) of the reversing valve (10); An upper flushing pipe (60) connected to the upper flushing pipe (126) of the reversing valve (10); and A lower flushing pipe (80) connected to the lower flushing pipe (128) of the reversing valve (10).

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