Control method of oral cleaning device, controller, and oral cleaning device

Abstract

The application discloses a control method of an oral cleaning device, a controller and the oral cleaning device, and relates to the technical field of oral cleaning devices. The method comprises the following steps: in a tooth brushing mode, a first PWM control signal is output to a tooth brushing assembly, and a second PWM control signal lower than a starting threshold value of a water outlet assembly is output to the water outlet assembly, so that the tooth brushing assembly performs a vibration action, and the water outlet assembly is kept powered on. In a rinsing mode, a third PWM control signal is output to the water outlet assembly, and a fourth PWM control signal lower than a starting threshold value of the tooth brushing assembly is output to the water outlet assembly, so that the water outlet assembly performs a liquid spraying action, and the tooth brushing assembly is kept powered on. In a double cleaning mode, fifth and sixth PWM control signals are output to the tooth brushing assembly and the water outlet assembly, and the two assemblies are controlled to work cooperatively. The application supports three working modes of the tooth brushing mode, the rinsing mode and the double cleaning mode, the switching between the modes is smooth, and the cleaning experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of oral hygiene equipment technology, and in particular to a control method, controller and oral hygiene equipment for oral hygiene equipment. Background Technology

[0002] Currently, oral hygiene devices on the market are mainly divided into two categories: electric toothbrushes and water flossers. Electric toothbrushes rely on high-frequency vibrations to drive the bristles and clean the tooth surface and gum line; water flossers use pulsating water flow to rinse hard-to-reach areas such as between teeth and gum sulcus to remove food debris. However, most existing devices have limited functions, and users often need to purchase and operate two sets of devices to achieve comprehensive cleaning. This not only increases the cost of use but also brings inconvenience to operation.

[0003] Although some oral hygiene devices attempt to combine brushing and flossing functions, their control logic often employs a complete shutdown switching strategy. This means that when performing a single function, the power to the other component must be completely cut off (e.g., cutting off the power to the flossing component while brushing, and vice versa). This control method results in significant response delays when components restart, severely impacting the smoothness of operation and reducing the user's overall cleaning experience.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this application is to provide a control method for an oral cleaning device, which aims to solve the problems of high response delay and poor cleaning experience when existing devices switch modes.

[0006] To achieve the above objectives, this application proposes a control method for an oral hygiene device, the oral hygiene device including a brushing assembly and a water outlet assembly; the control method for the oral hygiene device includes: In response to mode switching commands, it controls whether to enter brushing mode, flossing mode, or dual cleaning mode; In the brushing mode, a first PWM control signal is output to the brushing component to drive the brushing component to perform a vibration cleaning action; and a second PWM control signal is output to the water outlet component, wherein the duty cycle of the second PWM control signal is lower than the start-up threshold of the water outlet component, so that the water outlet component is kept powered on but does not spray liquid. In the rinsing mode, a third PWM control signal is output to the water outlet component to drive the water outlet component to perform a spraying action; and a fourth PWM control signal is output to the brushing component. The duty cycle of the fourth PWM control signal is lower than the start-up threshold of the brushing component, so that the brushing component is kept powered on but does not vibrate. In the dual cleaning mode, a fifth PWM control signal is output to the brushing component to drive the brushing component to perform a vibration cleaning action; and a sixth PWM control signal is output to the water outlet component to drive the water outlet component to perform a spraying action.

[0007] In one embodiment, before outputting any PWM control signal for driving the brushing assembly to perform a vibratory cleaning action, the method further includes: The current brushing speed is obtained, and the current brushing duty cycle is determined from multiple preset brushing duty cycles based on the current brushing speed. The duty cycle of the PWM control signal is configured to the current brushing duty cycle. The PWM control signal used to drive the brushing assembly to perform vibration cleaning action includes the first PWM control signal and the fifth PWM control signal; and / or, Before outputting any PWM control signal for driving the water outlet assembly to perform the spraying action, the method further includes: The current flushing speed is obtained, and the current flushing duty cycle is determined from multiple preset flushing duty cycles based on the current flushing speed. The duty cycle of the PWM control signal is configured to the current flushing duty cycle. The PWM control signal used to drive the water outlet component to perform the spraying action includes the third PWM control signal and the sixth PWM control signal.

[0008] In one embodiment, the brushing assembly includes a brush head and a sonic motor drivenly connected to the brush head; the frequencies of the first PWM control signal and the fifth PWM control signal are configured to a first preset drive frequency corresponding to the operating frequency of the sonic motor. The water outlet assembly includes at least one spray hole on the brush head, a flow channel communicating with the spray hole, and a diaphragm pump that pumps liquid to the spray hole through the flow channel; the frequencies of the third PWM control signal and the sixth PWM control signal are configured to a second preset drive frequency corresponding to the operating frequency of the diaphragm pump.

[0009] In one embodiment, the third PWM control signal and the sixth PWM control signal are output according to a preset multi-segment pulse timing sequence in each working cycle. The multi-segment pulse timing sequence includes a first on period, a first off period, a second on period, and a second off period in sequence. During the first opening period and the second opening period, the water outlet component performs a spraying action according to the third PWM control signal or the sixth PWM control signal; during the first closing period and the second closing period, the water outlet component stops spraying.

[0010] In one embodiment, the preset brushing duty cycles corresponding to the multiple brushing settings are 50%, 70%, and 90%, respectively. And / or, the multiple preset flushing duty cycles corresponding to the multiple flushing settings are 60%, 80%, and 100%.

[0011] In one embodiment, the first preset driving frequency is 290Hz, and / or the second preset driving frequency is 32kHz.

[0012] In one embodiment, the first on period, the first off period, the second on period, and the second off period are 140ms, 230ms, 190ms, and 780ms, respectively.

[0013] This application also proposes a controller that applies the control method for oral cleaning devices as described above.

[0014] This application also proposes an oral cleaning device, including a brushing component and a water dispensing component, as well as a controller as described above; wherein the controller is used to control the operation of the brushing component and the water dispensing component.

[0015] In one embodiment, the brushing assembly includes a brush head detachably mounted to the front end of the handle, and a sonic motor disposed inside the handle and pulsatorically connected to the brush head. The water outlet assembly includes at least one spray hole on the brush head, a flow channel communicating with the spray hole, and a diaphragm pump disposed inside the handle and pumping liquid to the spray hole through the flow channel.

[0016] This application employs a control method for an oral hygiene device, comprising: responding to a mode switching command to control entry into a brushing mode, a flossing mode, or a dual-cleaning mode. In brushing mode, a first PWM control signal is output to the brushing component to drive it to perform a vibration cleaning action; and a second PWM control signal is output to the water outlet component, the duty cycle of which is lower than the activation threshold of the water outlet component, so that the water outlet component remains energized but does not spray liquid. In flossing mode, a third PWM control signal is output to the water outlet component to drive it to perform a spraying action; and a fourth PWM control signal is output to the brushing component, the duty cycle of which is lower than the activation threshold of the brushing component, so that the brushing component remains energized but does not vibrate. In dual-cleaning mode, a fifth PWM control signal is output to the brushing component to drive it to perform a vibration cleaning action; and a sixth PWM control signal is output to the water outlet component to drive it to perform a spraying action. Compared with existing technologies, this application features three working modes: brushing mode, water flossing mode, or dual cleaning mode, which can meet diverse cleaning needs. Furthermore, both the brushing and water dispensing components remain powered in any working mode, avoiding cold start delays during mode switching and improving the smoothness of mode transitions. Thus, this application solves the problems of high response latency and poor cleaning experience in existing devices when switching modes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating an embodiment of the control method for the oral cleaning device provided in this application; Figure 2 A flowchart illustrating yet another embodiment of the control method for the oral cleaning device provided in this application; Figure 3 A schematic diagram of another embodiment of the control method for the oral cleaning device provided in this application; Figure 4 This is a schematic diagram of an embodiment of the oral cleaning device provided in this application.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0023] Most existing oral hygiene devices have limited functionality, often requiring users to purchase and operate two separate systems for comprehensive cleaning. This not only increases operating costs but also introduces operational inconvenience. While some oral hygiene devices attempt to combine brushing and flossing functions, their control logic typically employs a complete shutdown switching strategy. This means that when performing a single function, the power to the other component must be completely cut off (e.g., cutting off the power to the flossing component while brushing, and vice versa). This control method results in significant response delays when components restart, severely impacting operational smoothness and reducing the user's overall cleaning experience.

[0024] This application proposes a control method for oral cleaning equipment.

[0025] In one embodiment of this application, the oral hygiene device includes a brushing assembly and a water dispensing assembly. See also... Figure 1 The control method for oral cleaning equipment includes steps S10 to S40: Step S10: In response to the mode switching command, control to enter brushing mode, water flossing mode or dual cleaning mode.

[0026] Step S20: In the brushing mode, a first PWM control signal is output to the brushing component to drive the brushing component to perform a vibration cleaning action; and a second PWM control signal is output to the water outlet component. The duty cycle of the second PWM control signal is lower than the start-up threshold of the water outlet component, so that the water outlet component is kept powered on but does not spray liquid.

[0027] In step S30, in the rinsing mode, a third PWM control signal is output to the water outlet component to drive the water outlet component to perform the spraying action; and a fourth PWM control signal is output to the brushing component. The duty cycle of the fourth PWM control signal is lower than the start-up threshold of the brushing component, so that the brushing component is kept powered on but does not vibrate.

[0028] In step S40, under dual cleaning mode, a fifth PWM control signal is output to the brushing component to drive the brushing component to perform a vibration cleaning action; and a sixth PWM control signal is output to the water outlet component to drive the water outlet component to perform a spraying action.

[0029] In one embodiment, the toothbrush assembly includes a brush head and a sonic motor drivenly connected to the brush head; the frequencies of the first PWM control signal and the fifth PWM control signal are configured to a first preset drive frequency corresponding to the operating frequency of the sonic motor; The water outlet assembly includes at least one spray hole on the brush head, a flow channel communicating with the spray hole, and a diaphragm pump that pumps liquid to the spray hole through the flow channel; the frequencies of the third PWM control signal and the sixth PWM control signal are configured to a second preset drive frequency corresponding to the operating frequency of the diaphragm pump.

[0030] In this embodiment, the first preset driving frequency can be specifically set according to the rated operating parameters of the acoustic motor, for example, it can be set to 290Hz; and / or the second preset driving frequency can be specifically set according to the rated operating parameters of the diaphragm pump, for example, it can be set to 32kHz, and there is no limitation here.

[0031] It should be noted that the PWM control signal is a pulse width modulation signal. By adjusting the duty cycle of the signal, the driving intensity of the sonic motor or diaphragm pump can be controlled. The start-up threshold of the water outlet component refers to the minimum PWM duty cycle required for the nozzle to start producing effective liquid spraying when driving the diaphragm pump. Below this value, although the diaphragm pump is powered on, the output pressure is insufficient to overcome fluid resistance and nozzle back pressure, so no liquid is sprayed out. The start-up threshold of the brushing component refers to the minimum PWM duty cycle required for the brush head to start producing perceptible and effective cleaning vibrations when driving the sonic motor. Below this value, the motor only heats up slightly or vibrates imperceptibly, failing to achieve effective cleaning. Mode switching commands can be manually triggered by the user (e.g., via physical buttons, touchscreen, knobs, etc.) or automatically triggered by the device's built-in automatic cleaning process (e.g., executing brushing mode for the first 30 seconds to remove plaque, then automatically switching to rinsing mode to clean between teeth, or temporarily activating dual cleaning mode to enhance cleaning effect when a specific area is detected). There are no restrictions here.

[0032] In this embodiment, by integrating the brushing component and the water outlet component into the same device, three working modes are supported: brushing mode, rinsing mode, and dual cleaning mode, meeting diverse cleaning needs and reducing purchase costs and space occupation. In brushing mode, a first PWM control signal is output to the brushing component, and a second PWM control signal (below the start threshold of the water outlet component) is output to the water outlet component. This ensures that while the brushing component performs vibration cleaning, the water outlet component remains powered, avoiding cold start delays during mode switching. In rinsing mode, a third PWM control signal is output to the water outlet component, and a fourth PWM control signal (below the start threshold of the brushing component) is output to the water outlet component. This ensures that while the water outlet component performs spraying action, the brushing component remains powered, again avoiding cold start delays during mode switching. Compared with existing technologies, this embodiment has three working modes: brushing mode, water flossing mode, or dual cleaning mode, which can meet diverse cleaning needs. In any working mode, both the brushing component and the water outlet component remain powered, avoiding cold start delays in the water outlet component or brushing component during mode switching, improving the smoothness of mode switching, and solving the technical problems of existing oral cleaning devices that have single functions and require multiple machines to be used simultaneously, resulting in high costs, inconvenience of use, or switching lag and fragmented experience.

[0033] Please see Figure 2 In one embodiment of this application, before outputting any PWM control signal for driving the brushing assembly to perform a vibration cleaning action, the control method of the oral cleaning device further includes step S1001: The current brushing speed is obtained, and the current brushing duty cycle is determined from multiple preset brushing duty cycles based on the current brushing speed. The duty cycle of the PWM control signal is configured as the current brushing duty cycle. The PWM control signal used to drive the brushing assembly to perform vibration cleaning action includes a first PWM control signal and a fifth PWM control signal.

[0034] Please see Figure 3 In yet another embodiment of this application, before outputting any PWM control signal for driving the water dispensing component to perform the spraying action, the control method of the oral cleaning device further includes step S1002: The current flushing speed is obtained, and the current flushing duty cycle is determined from multiple preset flushing duty cycles based on the current flushing speed. The duty cycle of the PWM control signal is configured to the current flushing duty cycle. The PWM control signal used to drive the water outlet component to perform the spraying action includes the third PWM control signal and the sixth PWM control signal.

[0035] It should be noted that brushing settings can include gentle, standard, and strong brushing levels, with the corresponding brushing area ratio increasing sequentially. For example, the preset brushing area ratios for gentle, standard, and strong brushing levels are 50%, 70%, and 90%, respectively. Water flossing settings can also include gentle, standard, and strong water flossing levels, with the corresponding water flossing area ratio increasing sequentially. For example, the preset water flossing area ratios for gentle, standard, and strong water flossing levels are 60%, 80%, and 100%, respectively.

[0036] It should be noted that different users have significantly different tolerances to vibration intensity or water pressure—for example, people with sensitive gums usually need to use a lower cleaning intensity to avoid discomfort or damage. Therefore, this embodiment allows users to select brushing and / or flossing levels via an interface (such as buttons, a touchscreen, or a mobile application). The control system retrieves the corresponding current brushing or flossing duty cycle from a set of preset duty cycle parameters based on the selected level and configures it into the corresponding PWM control signal. Thus, in brushing mode or dual-cleaning mode, the duty cycle of the first or fifth PWM control signal driving the brushing component is the current brushing duty cycle; in flossing mode or dual-cleaning mode, the duty cycle of the third or sixth PWM control signal driving the water outlet component is the current flossing duty cycle. In this way, in any operating mode, the device can output matching vibration or water pressure according to the user-set intensity level, satisfying personalized cleaning needs while effectively improving comfort and safety during use, especially suitable for people with sensitive mouths or users in the recovery period.

[0037] In one embodiment of this application, the third PWM control signal and the sixth PWM control signal are output according to a preset multi-segment pulse timing sequence in each working cycle. The multi-segment pulse timing sequence includes a first turn-on period, a first turn-off period, a second turn-on period, and a second turn-off period in sequence. During the first and second opening periods, the water outlet component performs a spraying action according to the third or sixth PWM control signal; during the first and second closing periods, the water outlet component stops spraying.

[0038] It should be noted that intermittent pulsed water flow is more effective at removing plaque and food debris than continuous water flow because it can generate a hydrodynamic effect of impact, backflow, re-impact, and re-backflow, reaching deep into the gaps between teeth and the gingival sulcus. In addition, continuous spraying can easily cause gum stinging or discomfort.

[0039] In this embodiment, the oral cleaning device also includes a controller, which outputs corresponding PWM control signals to the brushing component and the water flossing component respectively. The controller can retrieve preset parameters of a multi-segment pulse timing sequence, including a first on period, a first off period, a second on period, and a second off period, and accordingly control the output of a third PWM control signal (for water flossing mode) or a sixth PWM control signal (for dual cleaning mode) to cyclically output within one working cycle according to the multi-segment pulse timing sequence. Specifically, during the first and second on periods, the PWM signal is high, driving the water outlet component to perform a spraying action; during the first and second off periods, the PWM signal is low, and the water outlet component stops spraying. Through this "spray-stop-spray-stop" dual-pulse structure, the water flow acts on the teeth and gum area in the form of intermittent high-pressure pulses. Thus, this embodiment can improve cleaning efficiency and enhance user comfort.

[0040] In this embodiment, the first on-time period, the first off-time period, the second on-time period, and the second off-time period can be set to 140ms, 230ms, 190ms, and 780ms, respectively. Thus, the water outlet component intermittently sprays water twice within one working cycle (a total of 1340ms): the first spray lasts 140ms, pauses for 230ms, then sprays water again for 190ms, followed by a 780ms pause, thereby forming a dual-pulse water flow output with a clear rhythm and pressure recovery interval.

[0041] It should be noted that each flushing setting can be configured to share the same set of multi-segment timing parameters, or each can be associated with its own independent multi-segment timing parameters. In the latter case, the parameter sets corresponding to different settings have different ratios of on and off periods. As the flushing setting switches from low to high, the duration of the first and / or second on periods increases accordingly, while the duration of the first and / or second off periods decreases accordingly, thereby increasing the effective spray duration per unit time and gradually increasing the water flow output intensity. Thus, the pulse spray characteristics smoothly transition from a low-intensity, long-interval intermittent mode to a high-intensity, short-interval intensive mode, meeting users' personalized needs for different cleaning intensities.

[0042] This application also provides a controller that employs the control method of the oral cleaning device in the above embodiments, which can solve the technical problems of high response delay and poor cleaning experience when existing devices switch modes. Compared with the prior art, the beneficial effects of the controller provided in this application are the same as those of the control method of the oral cleaning device provided in the above embodiments, and other technical features of the controller are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0043] Please see Figure 4 This application also provides an oral hygiene device, which includes a brushing component, a water outlet component, and a controller as described above. This oral hygiene device employs the control method of the oral hygiene device in the above embodiments, which can solve the technical problems of high response latency and poor cleaning experience when existing devices switch modes. Compared with the prior art, the beneficial effects of the oral hygiene device provided in this application are the same as the beneficial effects of the control method of the oral hygiene device provided in the above embodiments, and other technical features in the oral hygiene device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0044] In one embodiment of this application, the toothbrush assembly includes a brush head detachably mounted on the front end of the handle, and a sonic motor disposed inside the handle and drivenly connected to the brush head. The water outlet assembly includes at least one spray hole on the brush head, a flow channel communicating with the spray hole, and a diaphragm pump disposed inside the handle and pumping liquid to the spray hole through the flow channel.

[0045] In this embodiment, the sonic motor can drive the brush head bristles to efficiently remove plaque from the tooth surface, and the diaphragm pump can drive the water jet holes of the brush head to shoot out pulsed water flow, reaching deep into areas that the bristles cannot reach, such as between teeth and below the gum line. This can achieve a dual cleaning function for the oral cavity and improve the overall oral cleaning effect.

[0046] In one embodiment of this application, the specific working principle of the oral cleaning device is as follows: In brushing mode, the controller continuously sends a PWM control signal to the sonic motor at a frequency of 290Hz with a duty cycle of 50%, 70%, or 90% (depending on the current brushing setting), ensuring the sonic motor operates normally. Simultaneously, the controller continuously sends a PWM control signal to the diaphragm pump at a frequency of 32kHz with a duty cycle of 5%. At this duty cycle, the diaphragm pump is insufficient to drive the water jet.

[0047] In flushing mode, the controller provides a PWM control signal to the diaphragm pump with a duty cycle of 60%, 80%, or 100% (depending on the current flushing setting), with time intervals of: 140ms on, 230ms off, 190ms on, and 780ms off, causing the diaphragm pump to spray water twice in each working cycle. Simultaneously, a PWM control signal with a frequency of 100Hz and a duty cycle of 1% is continuously supplied to the sonic motor. At this duty cycle, the sonic motor is insufficient to drive the brush head to vibrate effectively.

[0048] In dual-cleaning mode, the controller continuously supplies a PWM control signal with a frequency of 290Hz and a duty cycle of 50%, 70%, or 90% (depending on the current brushing setting) to the sonic motor, ensuring its normal operation. Simultaneously, the controller supplies a PWM control signal to the diaphragm pump with a duty cycle of 60%, 80%, or 100% (depending on the current flossing setting) at time intervals of 140ms on, 230ms off, 190ms on, and 780ms off, causing the diaphragm pump to spray water twice per work cycle.

[0049] Thus, this embodiment has three working modes: brushing mode, water flossing mode, or dual cleaning mode, which can meet diverse cleaning needs. In any working mode, both the brushing component and the water outlet component remain powered, avoiding cold start delays in the water outlet component or brushing component during mode switching, improving the smoothness of mode switching, and solving the technical problems of existing oral cleaning devices that require multiple devices to be used simultaneously due to their single function, or the lag and fragmented experience during switching.

[0050] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A control method for an oral hygiene device, characterized in that, The oral hygiene device includes a brushing component and a water dispensing component; the control method of the oral hygiene device includes: In response to mode switching commands, it controls whether to enter brushing mode, flossing mode, or dual cleaning mode; In the brushing mode, a first PWM control signal is output to the brushing component to drive the brushing component to perform a vibration cleaning action; and a second PWM control signal is output to the water outlet component, wherein the duty cycle of the second PWM control signal is lower than the start-up threshold of the water outlet component, so that the water outlet component is kept powered on but does not spray liquid. In the rinsing mode, a third PWM control signal is output to the water outlet component to drive the water outlet component to perform a spraying action; and a fourth PWM control signal is output to the brushing component. The duty cycle of the fourth PWM control signal is lower than the start-up threshold of the brushing component, so that the brushing component is kept powered on but does not vibrate. In the dual cleaning mode, a fifth PWM control signal is output to the brushing component to drive the brushing component to perform a vibration cleaning action; and a sixth PWM control signal is output to the water outlet component to drive the water outlet component to perform a spraying action.

2. The control method for the oral cleaning device as described in claim 1, characterized in that, Before outputting any PWM control signal for driving the brushing assembly to perform a vibration cleaning action, the method further includes: The current brushing speed is obtained, and the current brushing duty cycle is determined from multiple preset brushing duty cycles based on the current brushing speed. The duty cycle of the PWM control signal is configured to the current brushing duty cycle. The PWM control signal used to drive the brushing assembly to perform vibration cleaning action includes the first PWM control signal and the fifth PWM control signal; and / or, Before outputting any PWM control signal for driving the water outlet assembly to perform the spraying action, the method further includes: The current flushing speed is obtained, and the current flushing duty cycle is determined from multiple preset flushing duty cycles based on the current flushing speed. The duty cycle of the PWM control signal is configured to the current flushing duty cycle. The PWM control signal used to drive the water outlet component to perform the spraying action includes the third PWM control signal and the sixth PWM control signal.

3. The control method for the oral cleaning device as described in claim 1, characterized in that, The toothbrush assembly includes a brush head and a sonic motor that is drivenly connected to the brush head; the frequencies of the first PWM control signal and the fifth PWM control signal are configured to a first preset drive frequency corresponding to the operating frequency of the sonic motor. The water outlet assembly includes at least one spray hole on the brush head, a flow channel communicating with the spray hole, and a diaphragm pump that pumps liquid to the spray hole through the flow channel; the frequencies of the third PWM control signal and the sixth PWM control signal are configured to a second preset drive frequency corresponding to the operating frequency of the diaphragm pump.

4. The control method for the oral cleaning device as described in claim 1, characterized in that, The third PWM control signal and the sixth PWM control signal are output according to a preset multi-segment pulse timing sequence in each working cycle. The multi-segment pulse timing sequence includes a first on period, a first off period, a second on period, and a second off period in sequence. During the first opening period and the second opening period, the water outlet component performs a spraying action according to the third PWM control signal or the sixth PWM control signal; during the first closing period and the second closing period, the water outlet component stops spraying.

5. The control method for the oral cleaning device as described in claim 2, characterized in that, The multiple brushing speeds correspond to multiple preset brushing coverage ratios of 50%, 70%, and 90% respectively; And / or, the multiple preset flushing duty cycles corresponding to the multiple flushing settings are 60%, 80%, and 100%.

6. The control method for the oral cleaning device as described in claim 3, characterized in that, The first preset driving frequency is 290Hz, and / or the second preset driving frequency is 32kHz.

7. The control method for the oral cleaning device as described in claim 4, characterized in that, The first opening period, the first closing period, the second opening period, and the second closing period are 140ms, 230ms, 190ms, and 780ms, respectively.

8. A controller, characterized in that, The controller applies the control method of the oral cleaning device as described in any one of claims 1 to 7.

9. An oral hygiene device, characterized in that, It includes a toothbrush assembly and a water outlet assembly, and a controller as described in claim 8; wherein the controller is used to control the operation of the toothbrush assembly and the water outlet assembly.

10. The oral hygiene device as described in claim 9, characterized in that, The toothbrush assembly includes a brush head detachably mounted to the front end of the handle, and a sonic motor disposed inside the handle and pulsatorically connected to the brush head; The water outlet assembly includes at least one spray hole on the brush head, a flow channel communicating with the spray hole, and a diaphragm pump disposed inside the handle and pumping liquid to the spray hole through the flow channel.

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