A control method of a multi-stage water route switching system

Abstract

The application provides a control method of a multi-stage waterway switching system, the switching system comprising a first switching unit and a second switching unit, the first switching unit having a first water inlet channel and at least a first water outlet channel and a second water outlet channel, the first water inlet channel being switchably communicated with the first water outlet channel and the second water outlet channel. The second switching unit has a second water inlet channel communicated with the second water outlet channel, and at least two secondary water outlet channels each communicated with the second water inlet channel, the second water inlet channel being switchably communicated with each secondary water outlet channel. The second switching unit comprises at least the following switching process: before the second switching unit is switched, the water outlet flow of one secondary water outlet channel is f1, after the second switching unit is switched, the water outlet flow of another secondary water outlet channel is f2, the flow between f1 and f2 is approximate, so that the water outlet temperature of the first water outlet channel of the first switching unit is stable, the user experience is improved, and the control is simple and practical.

Description

Technical Field

[0001] This invention relates to the field of sanitary ware, and in particular to a control method for a multi-stage water circuit switching system. Background Technology

[0002] Currently, most smart toilet seats only have one water path switching device inside to control the flow of water to different functions. The different function ports on a single water path switching device often have different flow requirements, but the heating components inside the smart toilet seat are limited by their heating power and generally keep the heating power constant. Therefore, during the switching process between different function ports, sudden changes in flow can easily cause sudden changes in water temperature. Since the human buttocks are very sensitive to temperature, this can easily lead to a decline in user experience.

[0003] In view of this, how to improve the waterway switching system to enhance the user experience is a technical problem that needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a control method for a multi-stage waterway switching system.

[0005] The present invention aims to solve the problem that existing water circuit switching devices suffer from poor user experience due to sudden changes in water temperature during the switching process between different functional ports.

[0006] To solve the above problems, the present invention is achieved through the following technical solution:

[0007] A control method for a multi-stage waterway switching system includes:

[0008] The first switching unit has a first water inlet channel, and at least a first water outlet channel and a second water outlet channel, wherein the first water inlet channel can be switched to be connected to the first water outlet channel and the second water outlet channel.

[0009] The second switching unit has a second inlet channel connected to the second outlet channel, and at least two secondary outlet channels respectively connected to the second inlet channel, wherein the second inlet channel can be switched to be connected to each of the secondary outlet channels.

[0010] Specifically, during the switching process between the primary water outlet channel and the secondary water outlet channel, before the second switching unit switches, the water flow rate of the primary water outlet channel is f1, and after the second switching unit switches, the water flow rate of the secondary water outlet channel is f2. The flow rates of f1 and f2 are approximately the same.

[0011] Furthermore, the flow rate of the secondary outlet channel refers to the flow rate of the outlet that connects the secondary outlet channel to the outside.

[0012] Furthermore, the flow rate difference between f1 and f2 is less than 100 ml / min; or, the flow rate difference between f1 and f2 is less than 50 ml / min.

[0013] Furthermore, when the first water inlet channel and the second water outlet channel are connected, during the switching process of the second switching unit, the total water flow rate of each secondary water outlet channel of the second switching unit is f3, and the flow rates of f1, f2 and f3 are similar.

[0014] Furthermore, the flow rate difference between any two of f1, f2, and f3 is less than 100 ml / min; or, the flow rate difference between any two of f1, f2, and f3 is less than 50 ml / min.

[0015] Furthermore, during the switching process of the second switching unit, the second switching unit does not take in water and / or does not take in water.

[0016] Furthermore, during the period when the first water inlet channel of the first switching unit supplies water to the first water outlet channel, the second switching unit performs switching.

[0017] Furthermore, the secondary water outlet channel includes a third water outlet channel and a fourth water outlet channel. Before the second switching unit switches, the water flow rate of the fourth water outlet channel is f1. After the second switching unit switches, the water flow rate of the third water outlet channel is f2. The flow rates of f1 and f2 are approximately the same.

[0018] Furthermore, in the initial state, the first water inlet channel is connected to the second water outlet channel. When someone is detected using the toilet, the first water inlet channel is energized, and the water flow first supplies water to the fourth water outlet channel. After a preset time, the second switching unit is controlled to switch to the state where the second water inlet channel is connected to the third water outlet channel.

[0019] Furthermore, in the initial state, the second water inlet channel is connected to the fourth water outlet channel, so that when water is flowing through the first water inlet channel, the water flow will at least first supply water to the fourth water outlet channel; or, in the initial state, the second water inlet channel is connected to a secondary water outlet channel other than the fourth water outlet channel, so that when water is flowing through the first water inlet channel, the second switching unit switches to connect the second water inlet channel to the fourth water outlet channel, so that the water flow will at least first supply water to the fourth water outlet channel.

[0020] When someone is detected using the device, the first function is activated first. The fourth water outlet channel is the water outlet channel corresponding to the first function. In the initial state, the first switching unit is in a state where the first water inlet channel and the second water outlet channel are connected. In the initial state, the second water inlet channel is at least connected to the fourth water outlet channel. After the water circuit is connected, the water flow will supply water to the fourth water outlet channel at least first.

[0021] The fourth water outlet channel is equipped with a purification module; when the deodorization function is activated, the first water inlet channel will start the water inlet time of 0s-60s every 0min-20min preset time.

[0022] When the deodorization function is activated, the first water inlet channel will start for 3-5 seconds every 5-10 minutes of preset time.

[0023] Furthermore, a water spray body with a human body cleaning channel is connected to the first water outlet channel, and the third water outlet channel includes a self-cleaning channel for cleaning the water spray body. The steps for performing the human body cleaning function are as follows:

[0024] S1. When a command to perform the human body cleaning function is received, the first switching unit switches to supply water to the first water outlet channel for the first time. During the first water supply to the first water outlet channel, the second switching unit switches from connecting the second water inlet channel to the fourth water outlet channel to connecting the third water outlet channel. After the first switching unit switches back from connecting the first water inlet channel to the first water outlet channel to connecting the first water inlet channel to the second water outlet channel, the third water outlet channel can be supplied with water for the first time.

[0025] S2. After the first water supply to the third water outlet channel is completed, the second switching unit remains stationary, and the first switching unit switches from connecting the first water inlet channel to the second water outlet channel back to connecting the first water inlet channel to the first water outlet channel, thereby supplying water to the first water outlet channel for the second time. After the first water outlet channel finishes supplying water for the second time, the first switching unit switches back to connecting the first water inlet channel to the second water outlet channel, and then supplies water to the third water outlet channel for the second time.

[0026] S3. Similarly, after the third water outlet channel finishes its nth water supply, the first switching unit switches from connecting the first water inlet channel to the second water outlet channel to connecting the first water inlet channel to the first water outlet channel to supply water to the first water outlet channel for the (n+1)th time. During the (n+1)th water supply of the first water outlet channel, the second switching unit switches from connecting the second water inlet channel to the third water outlet channel back to the initial state. Finally, after the (n+1)th water supply of the first water outlet channel, the first switching unit switches back to the initial state of connecting the first water inlet channel to the second water outlet channel; n is greater than or equal to 2.

[0027] Furthermore, the flow rate of the third water outlet channel is equal to that of the fourth water outlet channel, thereby making the flow rate difference between f1 and f2 less than 100 ml / min; or, the flow rate difference between f1 and f2 is less than 50 ml / min.

[0028] Furthermore, the multi-stage water path switching system also includes a water spray body with a human body cleaning channel, a self-cleaning channel, and a purification module with a purified water channel. The first water outlet channel includes the human body cleaning channel, the third water outlet channel includes the self-cleaning channel, and the water spray body is cleaned through the self-cleaning channel. The fourth water outlet channel includes the purified water channel.

[0029] Furthermore, the purification module is also provided with a reaction chamber connected to the purified water channel and an air intake channel connected to the reaction chamber. The toilet odor is drawn into the reaction chamber through the air intake channel, and the toilet odor mixes with the water in the reaction chamber and is converted into purified air before being discharged.

[0030] Furthermore, the purification module also includes a water mist generator and a spray channel connected to the purified water channel, and the fourth water outlet channel also includes the spray channel.

[0031] Furthermore, the second switching unit also includes a fifth water outlet channel, the multi-stage water path switching system also includes an atomization module, the atomization module is equipped with an atomization generator, and the fifth water outlet channel also includes a spray channel.

[0032] Furthermore, the second switching unit also includes a fifth water outlet channel, and the multi-stage water circuit switching system also includes a sterilization module with a sterilization channel, and the fifth water outlet channel also includes a sterilization channel.

[0033] Compared with the prior art, the technical solution of the present invention and its beneficial effects are as follows:

[0034] (1) The present invention designs the second switching unit to include at least the following switching process: before the second switching unit switches, the water flow rate of the primary water outlet channel is f1; after the second switching unit switches, the water flow rate of the other secondary water outlet channel is f2, and the flow rates of f1 and f2 are approximately the same. ， This ensures that the water flow rate of the second switching unit remains stable before and after the switching process described above, which in turn stabilizes the water temperature of the first water outlet channel. When a water spray body with a human body cleaning channel is connected to the first water outlet channel, the water temperature of the human body cleaning channel that comes into contact with the user's skin is stabilized, improving the user experience. Furthermore, the control is simple and the system is highly practical.

[0035] (2) In the control method of the present invention, when a user is detected, the first function is activated first, and the fourth water outlet channel is the water outlet channel corresponding to the first function. In the initial state, the first switching unit is in a state where the first water inlet channel and the second water outlet channel are connected, and the second water inlet channel is initially connected to the fourth water outlet channel at least. After the water circuit is connected, the water flow will supply water to the fourth water outlet channel at least first. That is, when the first switching unit is working, the second switching unit will be moved to the designated position of the required function in advance. When the first switching unit supplies water to the second switching unit, the required function can be realized, saving the switching time of the second switching unit and reducing the user's waiting time. Attached Figure Description

[0036] Figure 1 This is an assembly diagram of a multi-stage waterway switching system provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the first switching unit provided in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the second switching unit provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of a multi-stage waterway switching system provided in an embodiment of the present invention.

[0040] Illustration:

[0041] First switching unit-10; First water inlet channel-11; First water outlet channel-12; Second water outlet channel-13;

[0042] Second switching unit-20; Second water inlet channel-21; Third water outlet channel-22; Fourth water outlet channel-23; Fifth water outlet channel-24. Detailed Implementation

[0043] 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 some embodiments of the present invention, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present 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.

[0044] See Figures 1 to 4A control method for a multi-stage water path switching system includes a first switching unit 10 and a second switching unit 20. The first switching unit 10 has a first inlet channel 11, a first outlet channel 12, and a second outlet channel 13. The first inlet channel 11 is switchably connected to the first outlet channel 12 and the second outlet channel 13. The second switching unit 20 has a second inlet channel 21 connected to the second outlet channel 13, and at least two secondary outlet channels respectively connected to the second inlet channel 21. The second inlet channel 21 is switchably connected to each of the secondary outlet channels.

[0045] The second switching unit 20 includes at least the following switching process: Before the second switching unit 20 switches, the water flow rate of the primary outlet channel is f1; after the second switching unit 20 switches, the water flow rate of the other secondary outlet channel is f2. The flow rates of f1 and f2 are similar. Under stable water pressure, the water flow rates of each secondary outlet channel are approximately the same, thereby ensuring that the water flow rate of the second switching unit 20 is stable before and after the switching process described above. This, in turn, ensures that the water temperature of the first outlet channel of the first switching unit is stable, improving the user experience. Furthermore, the control is simple and highly practical. In this embodiment, "before the second switching unit 20 switches" refers to the state where the second inlet channel 21 is connected to the primary outlet channel during the switching process between the primary outlet channel and the other secondary outlet channel; "after the second switching unit 20 switches" refers to the state where the second inlet channel 21 is connected to the other secondary outlet channel during the switching process between the primary outlet channel and the other secondary outlet channel.

[0046] In other embodiments, during the switching process between the primary water outlet channel and another secondary water outlet channel, the second switching unit 20 initially remains in other positions. The second switching unit 20 first switches from other positions to the position where the second water inlet channel 21 is connected to the primary water outlet channel, so that before the second switching unit 20 switches, the second water inlet channel 21 is connected to the primary water outlet channel.

[0047] In other embodiments, another water outlet channel is provided between the primary water outlet channel and the other secondary water outlet channel. During the switching process between the primary water outlet channel and the other secondary water outlet channel, the second water inlet channel 21 will be connected to other water outlet channels. However, before the switch, it still refers to the state where the second water inlet channel 21 is connected to the primary water outlet channel, and after the switch, it still refers to the state where the second water inlet channel 21 is connected to the other secondary water outlet channel.

[0048] In this embodiment, the primary water outlet channel is the fourth water outlet channel 23, and the other secondary water outlet channel is the third water outlet channel 22.

[0049] In other words, during the switching process between the fourth water outlet channel (i.e., the primary water outlet channel) and the third water outlet channel (i.e., another secondary water outlet channel) of the present invention, the initial state of the second switching unit 20 can be that the second water inlet channel 21 is connected to the third water outlet channel, or the second water inlet channel 21 is connected to the fourth water outlet channel, or the second water inlet channel 21 is connected to other secondary water outlet channels, or the second water inlet channel 21 is disconnected from all secondary water outlet channels, etc. In addition, during the switching process between the fourth water outlet channel (i.e., the primary water outlet channel) and the third water outlet channel (i.e., another secondary water outlet channel) of the present invention, the second water inlet channel 21 can directly switch between the third water outlet channel and the fourth water outlet channel, or it can switch other water paths during the switching process between the third water outlet channel and the fourth water outlet channel. For example, the second water inlet channel 21 can switch from the state connected to the third water outlet channel to the state connected to the fifth water outlet channel 24 and then switch to the state connected to the fourth water outlet channel.

[0050] A pressure stabilizing valve can be connected in series upstream of the first water inlet channel 11 to make the water pressure of the system more stable. It can be understood that the water flow rate of the secondary water outlet channel refers to the water flow rate of the outlet of the secondary water outlet channel connected to the outside. In this embodiment, the second switching unit 20 includes a second switching valve and a water outlet pipeline connected to the second switching valve. The secondary water outlet channel includes the outlet of the second switching valve, the inlet of the water outlet pipeline, the water outlet pipeline, and the outlet of the water outlet pipeline connected to the outside.

[0051] In this embodiment, the flow rate difference between f1 and f2 is preferably less than 100 ml / min; more preferably, the flow rate difference between f1 and f2 is less than 50 ml / min.

[0052] When the first inlet channel 11 and the second outlet channel 13 are connected, during the switching process of the second switching unit 20, the total outlet flow rate of each secondary outlet channel of the second switching unit 20 is f3, and the flow rates of f1, f2 and f3 are similar.

[0053] In this embodiment, the flow rate difference between each pair of f1, f2 and f3 is less than 100 ml / min; or, the flow rate difference between each pair of f1, f2 and f3 is less than 50 ml / min.

[0054] In other embodiments, during the switching process of the first switching unit 10, the first water inlet channel 11 is connected to the first water outlet channel 12 and the second water outlet channel 13. The total water flow rate of each water outlet channel of the first switching unit 10 is f4, and the flow rates of f1, f2 and f4 are similar. The flow rate difference between each pair of f1, f2 and f4 is less than 100 ml / min; or, the flow rate difference between each pair of f1, f2 and f4 is less than 50 ml / min.

[0055] In other embodiments, during the switching process of the second switching unit 20, the second switching unit 20 does not take in water and / or does not take in water. Specifically, the second switching unit 20 switches during the water supply period from the first water inlet channel 11 of the first switching unit 10 to the first water outlet channel 12. Therefore, during the switching process of the second switching unit 20, the second switching unit 20 does not take in water.

[0056] In this embodiment, the secondary water outlet channel includes at least a third water outlet channel 22 and a fourth water outlet channel 23. The second water inlet channel 21 can be switched to be connected to the third water outlet channel 22 and the fourth water outlet channel 23. Before the second switching unit switches, the water flow rate of the fourth water outlet channel is f1. After the second switching unit switches, the water flow rate of the third water outlet channel is f2. The flow rates of f1 and f2 are approximately the same.

[0057] In this embodiment, the flow rate of the third water outlet channel 22 is equal to that of the fourth water outlet channel 23. The flow rate refers to the flow rate that the third water outlet channel 22 and the fourth water outlet channel 23 ultimately pass through due to the interception effect of the channel, so that the flow rate difference between f1 and f2 is less than 100ml / min or 50ml / min, and the function is stable.

[0058] The multi-stage water path switching system also includes a water spray body with a human body cleaning channel, a self-cleaning channel, and a purification module with a purified water channel. The first water outlet channel 12 includes a human body cleaning channel, the third water outlet channel 22 includes a self-cleaning channel for cleaning the water spray body, and the fourth water outlet channel 23 includes a purified water channel.

[0059] In this embodiment, the human body washing channel includes a posterior washing channel and / or a feminine washing channel.

[0060] In this embodiment, the purification module is further provided with a reaction chamber connected to the purified water channel and an air intake channel connected to the reaction chamber. The toilet odor is drawn into the reaction chamber through the air intake channel, and the toilet odor is mixed with the water in the reaction chamber and converted into purified air before being discharged.

[0061] In another embodiment, the purification module further includes a water mist generator and a spray channel connected to the purified water channel, and the fourth water outlet channel also includes a spray channel.

[0062] In this embodiment, the secondary water outlet channel also includes a fifth water outlet channel 24, and the multi-stage water circuit switching system also includes an atomization module. The atomization module is equipped with an atomization generator, and the fifth water outlet channel 24 also includes a spray channel.

[0063] In other embodiments, the secondary water outlet channel also includes a fifth water outlet channel 24, and the multi-stage water circuit switching system also includes a sterilization module with a sterilization channel. The fifth water outlet channel 24 includes a sterilization channel. Specifically, the sterilization module can be an electrolyzed water module.

[0064] The present invention also provides a multi-stage waterway control method.

[0065] Initially, the first water inlet channel 11 is connected to the second water outlet channel 13. When someone is detected using the toilet, the first water inlet channel 11 is opened, and the water flow first supplies water to the fourth water outlet channel 23. After a preset time, the second switching unit 20 is controlled to switch to the state where the second water inlet channel 21 is connected to the third water outlet channel 22. Specifically, when someone is detected using the toilet, the first function is activated first, and the fourth water outlet channel 23 is the water outlet channel corresponding to the first function. Initially, the second water inlet channel 21 is connected to the fourth water outlet channel 23, so when the first water inlet channel 11 is opened, the water flow first supplies water to the fourth water outlet channel 23, thereby executing the first function. During the operation of the first switching unit 10, the second switching unit 20 is pre-positioned to the designated position of the required function, and the function can be realized as soon as the first switching unit 10 supplies water, saving switching time and reducing the user's waiting time.

[0066] In other embodiments, in the initial state, the second water inlet channel 21 corresponds to a position other than the fourth water outlet channel 23 (it may correspond to other secondary water outlet channels, or be empty or blocked, etc.). When water is supplied to the first water inlet channel 11, the second switching unit 20 switches to connect the second water inlet channel 21 with the fourth water outlet channel 23, thereby supplying water to the fourth water outlet channel 23 at least first.

[0067] In this embodiment, the first function is deodorization. When the deodorization function is executed, the first water inlet channel 11 starts water intake for 0-60 seconds every preset time interval of 0-20 minutes. Considering the user's habits and the environmental factors when using the toilet, the water deodorization device is generally turned on as soon as the user sits down. Therefore, in the initial state, the second switching unit 20 is initially positioned at the water deodorization port (fourth water outlet channel), which can reduce the number of switching times of the switching unit and extend the service life of the switching unit. In this embodiment, the switching unit is a switching valve.

[0068] In this embodiment, when performing the deodorization function, the first water inlet channel 11 starts a water inlet duration of 3s-5s every 5min-10min preset time.

[0069] The first water outlet channel 12 is connected to a water spray body with a human body cleaning channel, and the self-cleaning channel of the third water outlet channel 22 cleans the water spray body.

[0070] The steps for performing the human body cleaning function are as follows:

[0071] S1. When a command to perform the human body cleaning function is received, the first switching unit 10 switches to supply water to the first water outlet channel 12 for the first time. During the first water supply to the first water outlet channel 12, the second switching unit 20 switches from connecting the second water inlet channel 21 to the fourth water outlet channel 23 and then to connecting the third water outlet channel 22. After the first switching unit switches back from connecting the first water inlet channel 11 to the first water outlet channel 12 and then back to connecting the first water inlet channel 11 to the second water outlet channel 13, the third water outlet channel can then be supplied with water for the first time. That is, while the water jet discharges the cold water from the pipes inside the smart cover and performs a large-flow intensive cleaning of the water jet head, the second switching unit 20 switches to prepare to supply water to the third water outlet channel 22. After the cold water in the pipes has been drained for a period of time, the third water outlet channel 22 immediately supplies water to the self-cleaning channel to clean the water jet. On the one hand, it washes away the dirt that the water spray has picked up on the human body, and on the other hand, it drains the cold water that was originally left in the smart cover. The second switching unit can achieve waterless switching, with stable flow and easy temperature control of the heating component. In addition, the water spray's function of washing the human body and its self-cleaning function are closely synchronized, saving switching time.

[0072] S2. After the first water supply to the third water outlet channel 22 is completed, the second switching unit remains stationary, and the first switching unit 10 switches back from connecting the first water inlet channel 11 to the second water outlet channel 13 to connecting the first water inlet channel 11 to the first water outlet channel 12, thereby supplying water to the first water outlet channel 12 for the second time. After the second water supply to the first water outlet channel 12 is completed, the first switching unit 10 switches back to connecting the first water inlet channel to the second water outlet channel 13, and then supplies water to the third water outlet channel 22 for the second time. Only one switching action from the first switching unit 10 is needed to smoothly achieve the cycle of the body cleaning function and the self-cleaning function.

[0073] S3. Following this pattern, after the third water outlet channel completes its nth water supply, the first switching unit 10 switches from connecting the first inlet channel 11 to the second outlet channel 13 to connecting the first inlet channel 11 to the first outlet channel 12 to supply water to the first outlet channel for the (n+1)th time. During the (n+1)th water supply to the first outlet channel 12, the second switching unit 20 switches from connecting the second inlet channel 21 to the third outlet channel 22 back to the initial state of connecting the second inlet channel 21 to the fourth outlet channel 23. Finally, after the (n+1)th water supply to the first outlet channel 12, the first switching unit 10 switches back to the initial state of connecting the first inlet channel 11 to the second outlet channel 13, where n is greater than or equal to 2. After the human body washing function ends, the water circuit switching system returns to its initial state, that is, the first switching unit 10 remains in the first inlet channel 11 connected to the second outlet channel 13, and the second inlet channel 21 is at least connected to the fourth outlet channel 23, so that the first function can be quickly executed as soon as the person sits down next time.

[0074] The flow rate difference of each secondary water outlet channel in the multi-stage water switching system of the present invention is less than 100 ml / min or 50 ml / min. Under stable water pressure, the flow rates of each secondary water outlet channel are approximately the same, thereby stabilizing the water temperature of the first water outlet channel of the first switching unit and improving the user experience. At the same time, by controlling the switching between the first and second switching units, the switching between functions can be achieved quickly, reducing the user's waiting time and effectively improving the user experience.

[0075] The foregoing description illustrates and describes preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A control method for a multi-stage waterway switching system, characterized in that, include: The first switching unit has a first water inlet channel, and at least a first water outlet channel and a second water outlet channel, wherein the first water inlet channel can be switched to be connected to the first water outlet channel and the second water outlet channel. The second switching unit has a second inlet channel connected to the second outlet channel, and at least two secondary outlet channels respectively connected to the second inlet channel, wherein the second inlet channel can be switched to be connected to each of the secondary outlet channels. The second switching unit includes at least the following switching process: before the second switching unit switches, the water flow rate of the primary water outlet channel is f1; after the second switching unit switches, the water flow rate of the other secondary water outlet channel is f2, and the flow rates of f1 and f2 are similar.

2. The control method for a multi-stage waterway switching system according to claim 1, characterized in that, The flow rate of the secondary outlet channel refers to the flow rate of the outlet channel that connects to the outside.

3. The control method for a multi-stage waterway switching system according to claim 1, characterized in that, The flow rate difference between f1 and f2 is less than 100 ml / min; or, the flow rate difference between f1 and f2 is less than 50 ml / min.

4. The control method for a multi-stage waterway switching system according to claim 1, characterized in that, When the first water inlet channel and the second water outlet channel are connected, during the switching process of the second switching unit, the total water flow rate of each secondary water outlet channel is f3, and the flow rates of f1, f2 and f3 are similar.

5. The control method for a multi-stage waterway switching system according to claim 4, characterized in that, The flow rate difference between any two of f1, f2, and f3 is less than 100 ml / min; or, the flow rate difference between any two of f1, f2, and f3 is less than 50 ml / min.

6. The control method for a multi-stage waterway switching system according to claim 1, characterized in that, During the switching process of the second switching unit, the second switching unit does not take in water and / or does not take in water.

7. The control method for a multi-stage waterway switching system according to claim 6, characterized in that, During the period when the first water inlet channel of the first switching unit supplies water to the first water outlet channel, the second switching unit switches.

8. The control method for a multi-stage waterway switching system according to claim 1, characterized in that, The secondary water outlet channel includes a third water outlet channel and a fourth water outlet channel. Before the second switching unit switches, the water flow rate of the fourth water outlet channel is f1. After the second switching unit switches, the water flow rate of the third water outlet channel is f2. The flow rates of f1 and f2 are approximately the same.

9. The control method for a multi-stage waterway switching system according to claim 8, characterized in that, In the initial state, the first water inlet channel is connected to the second water outlet channel. When someone is detected using the toilet, the first water inlet channel is turned on, and the water flow first supplies water to the fourth water outlet channel. After a preset time, the second switching unit is controlled to switch to the state where the second water inlet channel is connected to the third water outlet channel.

10. The control method for a multi-stage waterway switching system according to claim 9, characterized in that, In the initial state, the second water inlet channel is connected to the fourth water outlet channel, so that when water is flowing through the first water inlet channel, the water flow will at least supply water to the fourth water outlet channel first; or, in the initial state, the second water inlet channel corresponds to a position other than the fourth water outlet channel, so that when water is flowing through the first water inlet channel, the second switching unit switches to connect the second water inlet channel to the fourth water outlet channel, so that the water flow will at least supply water to the fourth water outlet channel first.

11. The control method for a multi-stage waterway switching system according to claim 8, characterized in that, include: When someone is detected using the device, the first function is activated first, and the fourth water outlet channel is the water outlet channel corresponding to the first function. In the initial state, the first switching unit is in a state where the first water inlet channel and the second water outlet channel are connected, and the second water inlet channel is initially connected to at least the fourth water outlet channel. After the water circuit is connected, the water flow will supply water to at least the fourth water outlet channel first.

12. The control method for a multi-stage waterway switching system according to claim 8, characterized in that, The fourth water outlet channel is equipped with a purification module; when the deodorization function is activated, the first water inlet channel will start the water inlet time of 0s-60s every 0min-20min preset time.

13. The control method for a multi-stage waterway switching system according to claim 12, characterized in that, When the deodorization function is activated, the first water inlet channel will start for 3-5 seconds every 5-10 minutes of preset time.

14. The control method for a multi-stage waterway switching system according to claim 8, characterized in that, The first water outlet channel is connected to a water spray body with a human body cleaning channel, and the third water outlet channel includes a self-cleaning channel for cleaning the water spray body. The steps for performing the human body cleaning function are as follows: S1. When a command to perform the human body cleaning function is received, the first switching unit switches to supply water to the first water outlet channel for the first time. During the first water supply to the first water outlet channel, the second switching unit switches from connecting the second water inlet channel to the fourth water outlet channel to connecting the third water outlet channel. After the first switching unit switches back from connecting the first water inlet channel to the first water outlet channel to connecting the first water inlet channel to the second water outlet channel, the third water outlet channel can be supplied with water for the first time. S2. After the first water supply to the third water outlet channel is completed, the second switching unit remains stationary, and the first switching unit switches from connecting the first water inlet channel to the second water outlet channel back to connecting the first water inlet channel to the first water outlet channel, thereby supplying water to the first water outlet channel for the second time. After the first water outlet channel finishes supplying water for the second time, the first switching unit switches back to connecting the first water inlet channel to the second water outlet channel, and then supplies water to the third water outlet channel for the second time. S3. Similarly, after the third water outlet channel finishes its nth water supply, the first switching unit switches from connecting the first water inlet channel to the second water outlet channel to connecting the first water inlet channel to the first water outlet channel to supply water to the first water outlet channel for the (n+1)th time. During the (n+1)th water supply of the first water outlet channel, the second switching unit switches from connecting the second water inlet channel to the third water outlet channel back to the initial state. Finally, after the (n+1)th water supply of the first water outlet channel, the first switching unit switches back to the initial state of connecting the first water inlet channel to the second water outlet channel; n is greater than or equal to 2.

15. The control method for a multi-stage waterway switching system according to claim 8, characterized in that, The flow rate of the third outlet channel is equal to that of the fourth outlet channel, thereby making the flow rate difference between f1 and f2 less than 100 ml / min; or, the flow rate difference between f1 and f2 is less than 50 ml / min.

16. The control method for a multi-stage waterway switching system according to claim 8, characterized in that, The multi-stage water path switching system also includes a water spray body with a human body cleaning channel, a self-cleaning channel, and a purification module with a purified water channel. The first water outlet channel includes the human body cleaning channel, the third water outlet channel includes the self-cleaning channel, and the water spray body is cleaned through the self-cleaning channel. The fourth water outlet channel includes the purified water channel.

17. The control method for a multi-stage waterway switching system according to claim 16, characterized in that, The purification module also includes a reaction chamber connected to the purified water channel and an air intake channel connected to the reaction chamber. The air intake channel draws toilet odor into the reaction chamber, where the odor mixes with the water in the reaction chamber and is converted into purified air before being discharged.

18. The control method for a multi-stage waterway switching system according to claim 16, characterized in that, The purification module also includes a water mist generator and a spray channel connected to the purified water channel, and the fourth water outlet channel also includes the spray channel.

19. The control method for a multi-stage waterway switching system according to claim 16, characterized in that, The second switching unit also includes a fifth water outlet channel, and the multi-stage water circuit switching system also includes an atomization module, which is equipped with an atomization generator. The fifth water outlet channel also includes a spray channel.

20. The control method for a multi-stage waterway switching system according to claim 16, characterized in that, The second switching unit further includes a fifth water outlet channel, and the multi-stage water circuit switching system further includes a sterilization module with a sterilization channel, and the fifth water outlet channel further includes the sterilization channel.

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