Protection control method and control device of oral irrigator and oral irrigator

Abstract

The invention discloses a protection control method and device of a water pick and the water pick, and relates to the technical field of circuit control. The oral irrigator comprises a motor, a constant pressure detection circuit used for detecting the output water pressure of the oral irrigator and a driving circuit used for driving the motor to work, responds to the mode trigger signal and confirms a target driving mode corresponding to the motor according to the mode trigger signal. Acquiring a detection signal of the output water pressure of the oral irrigator, and confirming the current working state of the oral irrigator according to the matching relationship between the pressure value corresponding to the detection signal and the preset pressure range of the target driving mode of the motor; and under the condition that the pressure value corresponding to the detection signal is not matched with the preset pressure range of the target driving mode of the motor, the driving signal output to the driving circuit is stopped, the enable control module program is reset, and the driving signal is output again, so that the output water pressure of the oral irrigator is within the preset pressure range corresponding to the target driving mode. The invention aims to improve the working safety of the oral irrigator.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit control, and in particular to a protection control method, a control device and a water flosser. Background Art

[0002] The water flosser is an auxiliary tool for cleaning the oral cavity. It mainly uses the impact of pulsed water flow to clean teeth and interdental spaces. The water flosser mainly uses the impact force of a high-speed water column ejected under a certain pressure to achieve cleaning. Therefore, stable water pressure control plays a very critical role in the cleaning effect of the water flosser. Among them, the water pressure is controlled by the motor directly driving the water pump, and the operation of the motor is achieved by the control unit in the water flosser controlling the rotation of the motor through the output control signal. Therefore, when there is an error in the software logic of the control unit of the water flosser or the program runs away, the motor will be out of control, which will also cause the output water pressure of the water flosser to be out of control, resulting in safety hazards for users when using it. Summary of the invention

[0003] The main purpose of the present invention is to provide a protection control method for an oral irrigator, aiming to improve the safety of the oral irrigator during operation.

[0004] To achieve the above-mentioned purpose, the present invention proposes a protection control method for a water flosser, wherein the water flosser comprises a motor, a constant voltage detection circuit for detecting the output water pressure of the water flosser, and a driving circuit for driving the motor to work, and the method comprises:

[0005] responding to a mode trigger signal and confirming a target drive mode corresponding to the motor according to the mode trigger signal;

[0006] Acquire a detection signal of the water pressure output by the oral irrigator, and confirm the current working state of the oral irrigator according to a matching relationship between a pressure value corresponding to the detection signal and a preset pressure range of a target driving mode of the motor;

[0007] Under the condition that the pressure value corresponding to the detection signal does not match the preset pressure range of the target driving mode of the motor, the enable control signal output to the drive circuit is stopped, the enable control module program is reset, and the drive signal is output again to ensure that the output water pressure of the oral irrigator is within the preset pressure range corresponding to the target driving mode.

[0008] In one embodiment of the present invention, the oral irrigator further includes a mode switching circuit and a power-on trigger circuit, wherein the mode switching circuit is used to output a mode switching signal when triggered, and the power-on trigger circuit is used to output a power-on signal when triggered; wherein the mode trigger signal includes a power-on signal and a mode switching signal; the oral irrigator has a plurality of drive modes preset corresponding to the motor, and the plurality of drive modes are arranged in a first order; the steps of responding to the mode trigger signal and confirming the target drive mode corresponding to the motor according to the mode trigger signal are specifically as follows:

[0009] In response to the power-on signal, confirming that the current driving mode is the target driving mode;

[0010] In response to the mode switching signal, a driving mode subsequent to the current driving mode is confirmed as the target driving mode according to the first sequence.

[0011] In one embodiment of the present invention, the constant pressure detection circuit is a pressure detection circuit, and the pressure detection circuit is arranged in the liquid output path of the oral irrigator. The specific steps of obtaining the detection signal of the water pressure output by the oral irrigator and confirming the current working state of the oral irrigator according to the matching relationship between the pressure value corresponding to the detection signal and the preset pressure range of the target driving mode of the motor are as follows:

[0012] Obtaining a pressure value corresponding to a pressure detection signal of the water pressure output by the oral irrigator, and confirming a preset pressure range corresponding to the target driving mode according to the target driving mode of the motor;

[0013] Under the condition that the output water pressure corresponding to the pressure detection signal is within the preset pressure range, confirming that the oral irrigator is in a normal working state;

[0014] Under the condition that the output water pressure corresponding to the pressure detection signal is not within the preset pressure range, it is confirmed that the oral irrigator is in an abnormal working state.

[0015] In one embodiment of the present invention, when the output water pressure corresponding to the pressure detection signal is not within the preset pressure range, the step of confirming that the oral irrigator is in an abnormal working state specifically includes:

[0016] Under the condition that the pressure value corresponding to the pressure detection signal is less than a preset pressure range, confirming that the oral irrigator is in an under-pressure working state;

[0017] Under the condition that the pressure value corresponding to the pressure detection signal is greater than a preset pressure range, it is confirmed that the oral irrigator is in an over-pressure working state.

[0018] In one embodiment of the present invention, the driving signal is a PWM signal, and after the step of confirming that the water flosser is in an undervoltage working state, the method includes:

[0019] The duty cycle of the driving signal is adjusted to a target duty cycle so that the operating power of the motor is within a preset power range corresponding to the target driving mode.

[0020] In one embodiment of the present invention, the oral irrigator further includes a prompt circuit. When the pressure value corresponding to the detection signal does not match the preset pressure range of the target driving mode of the motor, the specific steps of stopping the output of the enable control signal to the drive circuit and resetting the enable control module program include:

[0021] Under the condition that the pressure value corresponding to the pressure detection signal is not within the preset pressure range, it is confirmed that the oral irrigator is in an abnormal working state, and a stop prompt signal and a stop signal are output;

[0022] According to the shutdown signal, stopping the driving circuit from working;

[0023] Under the condition that the stop time reaches the first preset time, the resetting of the enabling control module program is completed.

[0024] In one embodiment of the present invention, after completing the step of resetting the enabling control module program under the condition that the stop duration reaches the first preset duration, the method further includes:

[0025] Confirm that the oral irrigator is in normal working state, and output a power-on prompt signal and a power-on signal;

[0026] According to the power-on signal, the drive circuit is controlled to work so that the drive circuit outputs a drive signal to the motor again.

[0027] The present invention also proposes a control device, comprising: a memory, a processor, and a water flosser control program stored in the memory and running on the processor, wherein the water flosser control program is configured to implement the steps of the water flosser protection control method as described in any one of the above items.

[0028] The present invention also provides a water flosser, which includes a motor, a constant pressure detection circuit for detecting the water pressure output by the water flosser, a drive circuit for driving the motor, and the control device as described above.

[0029] In one embodiment of the present invention, the water flosser further comprises:

[0030] A mode trigger circuit, wherein an output end of the mode trigger circuit is electrically connected to the control device, and the mode trigger circuit is used to output a mode trigger signal when triggered;

[0031] A driving circuit, wherein a controlled end of the driving circuit is electrically connected to the constant voltage detection circuit, and the driving circuit is used for detecting a pressure signal output by the constant voltage detection circuit;

[0032] a prompt circuit, wherein an input end of the prompt circuit is electrically connected to the control device, and the prompt circuit is used to output a prompt signal according to a prompt control signal output by the control device;

[0033] Wherein, the output end of the constant voltage detection circuit is electrically connected to the control device and is used to output a detection signal; the control device is also used to output a start signal or a stop signal according to the detection signal.

[0034] The technical solution of the present invention detects the water pressure output by the water flosser when working by using a constant pressure detection circuit, and outputs a detection signal. The control device confirms the current working state of the water flosser by matching the pressure value corresponding to the detection signal with the preset pressure range corresponding to the target drive mode. It can be understood that in the control device, the preset program for controlling the operation of the drive circuit and the preset program for confirming the matching relationship between the pressure value corresponding to the detection signal and the preset pressure range corresponding to the target drive mode are two sets of programs that do not interfere with each other. Therefore, when the control device confirms that the pressure value corresponding to the detection signal does not match the preset pressure range corresponding to the target drive mode, the enable control signal output to the drive circuit is stopped, and the enable control module program is reset, and the drive signal is output again according to the target drive mode, so that the output water pressure of the water flosser is within the preset pressure range corresponding to the target drive mode, and the self-checking and correction of the output water pressure of the water flosser is realized, which improves the safety of the user when using the water flosser. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 It is a schematic flow chart of the protection control method of the oral irrigator of the present invention;

[0037] Figure 2 A schematic flow chart of another embodiment of the protection control method of the oral irrigator of the present invention;

[0038] Figure 3 A schematic flow chart of another embodiment of the protection control method of the oral irrigator of the present invention;

[0039] Figure 4A schematic flow chart of another embodiment of the protection control method of the oral irrigator of the present invention;

[0040] Figure 5 It is a schematic diagram of a module of an embodiment of a water flosser of the present invention.

[0041] 10. Control device; 20. Mode trigger circuit; 30. Drive circuit; 40. Constant voltage detection circuit; 50. Prompt circuit.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The water flosser is an auxiliary tool for cleaning the oral cavity. It mainly uses the impact of pulsed water flow to clean teeth and interdental spaces. The water flosser mainly uses the impact force of a high-speed water column ejected under a certain pressure to achieve cleaning. Therefore, stable water pressure control plays a very critical role in the cleaning effect of the water flosser. Among them, the water pressure is controlled by the motor directly driving the water pump, and the operation of the motor is achieved by the control unit in the water flosser controlling the rotation of the motor through the output control signal. Therefore, when there is an error in the software logic of the control unit of the water flosser or the program runs away, the motor will be out of control, which will also cause the output water pressure of the water flosser to be out of control, resulting in safety hazards for users when using it.

[0047] Therefore, reference Figure 1 The present invention proposes a protection control method for a water flosser, wherein the water flosser comprises a motor, a constant voltage detection circuit for detecting the output water pressure of the water flosser, and a driving circuit for driving the motor to work. The method comprises:

[0048] Step S100: responding to a mode trigger signal and confirming a target driving mode corresponding to the motor according to the mode trigger signal;

[0049] Step S200: obtaining a detection signal of the output water pressure of the oral irrigator, and confirming the current working state of the oral irrigator according to a matching relationship between a pressure value corresponding to the detection signal and a preset pressure range of a target driving mode of the motor;

[0050] Step S300: When the pressure value corresponding to the detection signal does not match the preset pressure range of the target driving mode of the motor, stop outputting the enable control signal to the driving circuit, reset the enable control module program, and output the driving signal again so that the output water pressure of the oral irrigator is within the preset pressure range corresponding to the target driving mode.

[0051] In this embodiment, at least one trigger button is provided on the surface of the water flosser body, and the user can activate the water flosser and switch the mode by triggering the button. According to actual needs, the water flosser can be set with multiple driving modes, and the multiple driving modes of the water flosser can be switched one by one by multiple trigger buttons, or the driving modes of the water flosser can be switched continuously by continuously triggering a single trigger button. For example, the water flosser can have three driving modes, namely normal, gentle, and pulse, and different driving modes are intended to meet the diverse oral cleaning needs and sensitivity of users. Among them, the normal driving mode usually provides medium to high water pressure, which is suitable for most daily cleaning scenarios. It can effectively remove food residues and dental plaque on the surface of teeth and between teeth, and is suitable for users who are accustomed to using water flossers and have good oral health. The gentle driving mode is suitable for first-time users or people with sensitive gums and easy bleeding. The water pressure it provides is lower than the standard mode to reduce the stimulation of gums and oral soft tissues, ensure that cleaning is completed in a gentle way, and help users gradually adapt to the use of the water flosser. The pulse driving mode achieves cleaning through high-frequency water flow pulses, and these pulsed water flows can produce a strong cleaning effect in a short time. Compared with continuous water flow, pulsed water flow can more effectively remove dental plaque and food debris without increasing the overall water pressure, and is particularly suitable for cleaning periodontal pockets and areas around braces. Furthermore, the user can input a mode trigger signal through the trigger button set on the surface of the water flosser, so that the water flosser can confirm the target drive mode corresponding to the motor according to the mode trigger signal, so that the motor works according to the drive signal corresponding to the mode trigger signal.

[0052] It is understandable that when designing the program architecture of the control device, it is usually necessary to take into account the mutual influence between different functional modules. Therefore, when designing the program architecture of the control device, a modular design is usually adopted, and each functional module is relatively independent, so that when a problem occurs in one functional module, it does not affect another functional module. In addition, the execution of critical tasks can be guaranteed by setting a priority scheduling mechanism, and even if non-critical tasks fail, they will not interfere with critical tasks. In addition, the control device may also include multiple control circuits, and different functions may be assigned to different control circuits, so that even if a program on one control circuit fails, it will not affect the program on another control circuit. Among them, the control circuit can be implemented by a main controller, such as DSP (Digital Signal Process, digital signal processing chip), FPGA (Field Programmable Gate Array, programmable logic gate array chip), MCU (Microcontroller Unit, micro control unit), SOC (System On Chip, system-on-chip), etc.

[0053] In this embodiment, the constant pressure detection circuit can be implemented by a pressure detection circuit, a flow detection circuit, a conductivity detection circuit, etc. Among them, the pressure detection circuit can directly use a pressure sensor to directly measure the pressure of the liquid output by the water flosser. This sensor needs to be installed at a key point in the water flow path, such as the outlet of the water pump or the front end of the nozzle, to monitor the water pressure in real time. The flow detection circuit indirectly calculates the water pressure by detecting the speed of the turbine when the water flows through. Although it does not directly measure the pressure, the change in water pressure can be calculated in combination with the known relationship between flow and pressure. The control device receives the detection signal output by the constant pressure detection circuit, and then confirms the pressure value of the water pressure output by the water flosser at the corresponding moment, and confirms the target drive mode corresponding to the motor at the corresponding moment. For example, the drive mode of the water flosser at the corresponding moment is the gentle mode, and the pressure value of its output water pressure is in a relatively low preset pressure range; the drive mode of the water flosser at the corresponding moment is the normal mode, and the pressure value of its output water pressure is in a relatively medium preset pressure range. Among them, the preset pressure ranges of different target drive modes are stored in the control device. The control device confirms whether the current working state of the oral irrigator is normal by confirming whether the pressure value corresponding to the detection signal is within the preset pressure range of the corresponding target driving mode.

[0054] It is understandable that in the control device of the oral irrigator, two types of module programs are distinguished, namely, protection control and enable control. Among them, the priority of the protection control module program is higher than that of the enable control module program. In this embodiment, the control device will confirm in the protection control module program whether the pressure value corresponding to the detection signal matches the preset pressure range of the target drive mode of the motor, and if it is confirmed that there is no match, stop the enable control module program from continuing to work, thereby stopping the enable control signal output to the drive circuit. The control device confirms that the enable control module program is abnormal through the protection control module program, and resets it. Through the reset process, problems caused by program errors can be solved, such as memory leaks, infinite loops, unreleased resources, etc. After the enable control module program is reset, the control device will control its operation again to output the drive signal to the drive circuit again, so that the output water pressure of the oral irrigator is within the preset pressure range corresponding to the target drive mode.

[0055] The water pressure output by the water flosser during operation is detected by using a constant voltage detection circuit, and a detection signal is output. The control device confirms the current working state of the water flosser by matching the pressure value corresponding to the detection signal with the preset pressure range corresponding to the target drive mode. It can be understood that in the control device, the preset program for controlling the operation of the drive circuit and the preset program for confirming the matching relationship between the pressure value corresponding to the detection signal and the preset pressure range corresponding to the target drive mode are two sets of programs that do not interfere with each other. Therefore, when the control device confirms that the pressure value corresponding to the detection signal does not match the preset pressure range corresponding to the target drive mode, the enable control signal output to the drive circuit is stopped, and the enable control module program is reset, and the drive signal is output again according to the target drive mode, so that the output water pressure of the water flosser is within the preset pressure range corresponding to the target drive mode, and the self-checking and correction of the output water pressure of the water flosser is realized, which improves the safety of the user when using the water flosser.

[0056] refer to Figure 2 In one embodiment of the present invention, the oral irrigator further comprises a mode switching circuit and a power-on trigger circuit, wherein the mode switching circuit is used to output a mode switching signal when triggered, and the power-on trigger circuit is used to output a power-on signal when triggered; wherein the mode trigger signal comprises a power-on signal and a mode switching signal; the oral irrigator is provided with a plurality of drive modes corresponding to the motor, and the plurality of drive modes are arranged in a first order; the steps of responding to the mode trigger signal and confirming the target drive mode corresponding to the motor according to the mode trigger signal are specifically as follows:

[0057] Step S110: in response to the power-on signal, confirming that the current driving mode is the target driving mode;

[0058] Step S120: In response to the mode switching signal, according to the first sequence, confirming the next driving mode after the current driving mode as the target driving mode.

[0059] In this embodiment, at least two types of trigger buttons are provided on the surface of the oral irrigator body, namely, a power-on trigger button and a mode switching button, and correspond to the power-on trigger circuit and the mode switching circuit respectively. It can be understood that the two types of trigger buttons provided on the surface of the oral irrigator body correspond to the power on / off function and the mode switching function of the oral irrigator power supply respectively. Therefore, the mode trigger signal includes a working power-on signal and a mode switching signal. Among them, the power-on trigger button can realize the switching of the two modes of power on and off by repeated triggering of a single button. Multiple trigger buttons for the mode switching function can be set, and each trigger button corresponds to a type of driving mode; the trigger button of the mode switching function can also be set to a single one, and the sequential switching of the driving mode can be realized by multiple triggering of a single trigger button. Specifically, the working power-on signal can be obtained through the power-on trigger circuit, and the working power-on signal is input into the control device, so that the control device executes the driving mode last executed when the oral irrigator is turned off before, that is, the mode memory function. Among them, the driving mode last executed by the control device when the oral irrigator is turned off before is the first driving mode. When the mode switch button is not triggered, only the power-on trigger button is triggered, and the oral irrigator will drive the motor to work in the drive mode that was last executed when the oral irrigator was turned off. When the power-on trigger button is triggered, the mode switch button is triggered, and the control device will obtain the mode switch signal, and then switch the mode according to the first sequence, that is, switch from the first drive mode to the second drive mode, so that the motor works according to the second drive mode, and confirm the mode as the target drive mode. For example, the drive mode that was last executed when the oral irrigator was turned off was the pulse drive mode, that is, the pulse drive mode was the first drive mode; when the power-on trigger button is triggered, the mode switch button is triggered, and the control device switches the pulse drive mode to the normal drive mode according to the preset mode switching sequence, that is, the normal drive mode is the second drive mode.

[0060] refer to Figure 3 In one embodiment of the present invention, the constant pressure detection circuit is a pressure detection circuit, and the pressure detection circuit is arranged in the liquid output path of the water flosser. The specific steps of obtaining the detection signal of the water pressure output by the water flosser and confirming the current working state of the water flosser according to the matching relationship between the pressure value corresponding to the detection signal and the preset pressure range of the target driving mode of the motor are as follows:

[0061] Step S210: obtaining a pressure value corresponding to a pressure detection signal of the water pressure output by the oral irrigator, and confirming a preset pressure range corresponding to the target driving mode according to the target driving mode of the motor;

[0062] Step S220: confirming that the oral irrigator is in a normal working state under the condition that the output water pressure corresponding to the pressure detection signal is within a preset pressure range;

[0063] Step S230: Under the condition that the output water pressure corresponding to the pressure detection signal is not within the preset pressure range, confirming that the oral irrigator is in an abnormal working state.

[0064] In this embodiment, the constant pressure detection circuit adopts a pressure detection circuit, and the pressure detection circuit detects whether the output water pressure of the water flosser is within the preset pressure range. It is understandable that the force of the water flosser outputting liquid will directly act on the user's teeth, and this force will be manifested as direct pressure. Therefore, the use of a pressure detection circuit can be more in line with the pressure on the user's teeth. Among them, the pressure detection circuit can be implemented by a pressure sensor. In order to accurately detect the output water pressure of the water flosser, the pressure sensor should be placed at the position closest to the nozzle of the water flosser, so as to ensure that the measured pressure is the closest to the actual pressure acting on the tooth surface. Further, in order to make the detection signal output by the pressure detection circuit more accurate, the pressure detection signal output by the pressure sensor needs to be amplified and filtered so that the control device can more accurately confirm the pressure value corresponding to the pressure detection signal. In addition, the current driving mode of the water flosser motor is confirmed by the mode trigger circuit to further confirm the preset pressure range corresponding to the current driving mode. Among them, the preset pressure ranges corresponding to different target driving modes are also different. For example, the target driving mode of the motor is a gentle mode, and its corresponding preset pressure range is greater than the preset pressure range of the target driving mode being a pulse driving mode. Under the condition that the output water pressure corresponding to the pressure detection signal is within the preset pressure range, the control device will consider that the output of the enable control signal is normal, thereby causing the drive circuit to output the correct drive signal to the motor. Under the condition that the output water pressure corresponding to the pressure detection signal is not within the preset pressure range, the control device will consider that the output of the enable control signal is abnormal, thereby stopping the operation of the enable control module program through the protection control module program, and controlling it to perform a reset operation so that it outputs the correct enable control signal.

[0065] Optionally, when the output water pressure corresponding to the pressure detection signal is not within a preset pressure range, the step of confirming that the water flosser is in an abnormal working state specifically includes:

[0066] Under the condition that the pressure value corresponding to the pressure detection signal is less than a preset pressure range, confirming that the oral irrigator is in an under-pressure working state;

[0067] Under the condition that the pressure value corresponding to the pressure detection signal is greater than a preset pressure range, it is confirmed that the oral irrigator is in an over-pressure working state.

[0068] In this embodiment, the output water pressure corresponding to the pressure detection signal is not within the preset pressure range and is divided into two situations. One is that the output water pressure corresponding to the pressure detection signal is less than the preset pressure range, and the other is that the output water pressure corresponding to the pressure detection signal is greater than the preset pressure range. Both situations may be caused by abnormal operation of the enabling control program or other reasons. It is understandable that the control device compares and confirms the voltage value corresponding to the pressure detection signal with the preset pressure range, thereby obtaining the current working state of the water flosser for subsequent control operations.

[0069] Furthermore, the driving signal is a PWM signal, and after the step of confirming that the water flosser is in an undervoltage working state, the method includes:

[0070] The duty cycle of the driving signal is adjusted to a target duty cycle so that the operating power of the motor is within a preset power range corresponding to the target driving mode.

[0071] In this embodiment, in the process of using a battery to power the motor, the internal voltage of the battery gradually decreases due to continuous power supply, thereby causing the power supply voltage of the motor to decrease. The reduction of the motor power supply voltage will cause the motor speed to decrease, thereby causing the pump body driven by the motor to be unable to stably output the water in the water tank of the water flosser, so that the user cannot get a good user experience when using the water flosser. Therefore, in order to ensure that the motor speed is always in a relatively stable state, it is necessary to ensure that the working power of the motor is always in a relatively stable state, that is, to limit the working power of the motor to a preset power range. It should be understood that in the water flosser, a DC motor is usually used to drive the pump body to work, and the drive of the DC motor is usually to use a PWM signal to adjust the average voltage of the motor power supply, thereby controlling the motor speed. By changing the pulse width, that is, the ratio of the high level duration to the total cycle (duty cycle), the motor speed can be finely adjusted without changing the power supply voltage. The battery power supply voltage is always in a state of continuous decrease due to the operation of the water flosser. If the pulse width of the PWM signal driving the DC voltage is not changed, the motor speed will be reduced. Among them, the output voltage of the battery is also the power supply voltage of the motor. Therefore, in order to ensure that the speed of the motor is in a relatively stable state, it is necessary to increase the ratio of the high-level duration to the total cycle, that is, to adjust the drive signal output to the drive circuit through the output voltage of the battery, so that the working power of the motor during operation is maintained within the preset power range corresponding to the target drive mode. The determination of the battery output voltage needs to be achieved through a voltage detection circuit. Furthermore, the speed of the motor is also related to the drive mode of the motor. For different drive modes, the speed of the motor is also different. For example, when the water flosser is in gentle mode, the speed of the motor is relatively slow; and when the water flosser is in pulse mode, the speed of the motor is relatively fast when it rotates. Therefore, it is also necessary to adjust the drive signal of the motor according to the drive mode of the motor.

[0072] In this embodiment, the acquisition of the battery output voltage can be implemented by a voltage detection circuit, and the voltage detection circuit can be implemented by a resistor voltage-dividing sampling circuit, a linear operational amplifier voltage sampling circuit, a voltage sampling transformer, etc. The water flosser obtains the output voltage of the battery in the water flosser, that is, the power supply voltage of the motor, through the voltage detection signal output by the voltage detection circuit. Among them, the control device converts the input voltage detection signal into a corresponding voltage value through a built-in analog-to-digital conversion module, and then confirms the output voltage of the battery. It can be understood that the output voltage of the battery will directly affect the working power of the motor in the water flosser. Therefore, a preset corresponding relationship is built into the control device, that is, there is a corresponding relationship between the output voltage of the battery and the driving signal that drives the motor to work. In addition, it is also necessary to consider the driving mode to be executed by the motor. Further, it can be understood that the drive of the motor can be implemented by PWM signal control, direct voltage change control, resistance control, current chopping control, etc. Taking the driving signal of the motor as a PWM signal as an example, the switching and control of the motor driving mode can be achieved by changing the duty cycle and output frequency of the PWM signal. Among them, it is not difficult to understand that as the water flosser continues to work, the output voltage of the battery will gradually decrease, that is, the power supply voltage of the motor will gradually decrease. Increasing the duty cycle of the PWM signal means that within a PWM cycle, the proportion of high levels increases. Although the voltage of a single pulse is still the output voltage of the battery after the reduction, the effective average voltage passing through the motor will increase due to the longer high level time. In this way, the average input power of the motor can be increased without significantly increasing the instantaneous current, thereby maintaining the speed of the motor. Specifically, for different drive modes, the corresponding PWM duty cycle is different at the same power supply voltage. Among them, the voltage value corresponding to the voltage detection signal is inversely proportional to the duty cycle of the PWM signal that drives the motor to work, that is, the larger the voltage value corresponding to the voltage detection signal, the smaller the duty cycle of the PWM signal that drives the motor to work; the smaller the voltage value corresponding to the voltage detection signal, the larger the duty cycle of the PWM signal that drives the motor to work.

[0073] refer to Figure 4 In one embodiment of the present invention, the oral irrigator further includes a prompt circuit, and under the condition that the pressure value corresponding to the detection signal does not match the preset pressure range of the target driving mode of the motor, the specific steps of stopping the output of the enable control signal to the drive circuit and resetting the enable control module program include:

[0074] Step S310: under the condition that the pressure value corresponding to the pressure detection signal is not within the preset pressure range, confirming that the oral irrigator is in an abnormal working state, and outputting a stop prompt signal and a stop signal;

[0075] Step S320: stopping the driving circuit according to the shutdown signal;

[0076] Step S330: When the stop time reaches the first preset time, the resetting of the enabling control module program is completed.

[0077] In this embodiment, the prompt circuit can be implemented by an LED prompt circuit or a vibration prompt circuit, and the different working states of the LED prompt circuit and the vibration prompt circuit are used to prompt the user of the current working state of the water flosser. The control device receives the pressure detection signal output by the pressure detection circuit, and then confirms the output water pressure of the water flosser at this time, and further confirms whether it is within the preset pressure range. When the pressure value corresponding to the pressure detection signal is not within the preset pressure range, the protection control module program in the control device will confirm that the water flosser is in an abnormal working state at this time, and thus output a corresponding control signal. Among them, the prompt circuit will output a shutdown prompt signal according to the control signal, and the enable control module program will output a shutdown signal to the drive circuit according to the control signal to stop the drive circuit from working. It is understandable that the user suddenly finds that the prompt circuit outputs a shutdown prompt signal and the water flosser is in a stopped state during the use stage. However, the user is still in the stage where it needs to be used. Therefore, the enable control module program in the water flosser needs to be reset within a certain period of time and re-control the drive circuit to work normally to meet the user's use needs. The first preset time length is the time length required for the driving circuit to stop working and resume working, that is, the time length required for resetting the control module program.

[0078] Optionally, after completing the step of resetting the enabling control module program under the condition that the stop duration reaches a first preset duration, the method further includes:

[0079] Confirm that the oral irrigator is in normal working state, and output a power-on prompt signal and a power-on signal;

[0080] According to the power-on signal, the drive circuit is controlled to work so that the drive circuit outputs a drive signal to the motor again.

[0081] In this embodiment, after the reset of the enabling control module program is completed, the protection control module program will obtain the information and output a corresponding control signal, so that the prompt circuit outputs a power-on prompt signal according to the control signal, thereby allowing the user to confirm that the oral irrigator is currently in the work recovery stage. The enabling control module program will output a power-on signal to the drive circuit according to the control signal, so that the drive circuit starts working again, and then the drive circuit re-outputs a drive signal to the motor, so that the oral irrigator outputs a water pressure corresponding to the preset pressure range of the target drive mode.

[0082] The present invention also proposes a control device, the control device comprising: a memory, a processor, and a water flosser control program stored in the memory and running on the processor, the water flosser control program being configured to implement the steps of the water flosser protection control method as described in any one of the above. It is worth noting that since the control device of the present invention is based on the above-mentioned water flosser protection control method, the embodiments of the control device of the present invention include all technical solutions of all embodiments of the above-mentioned water flosser protection control method, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0083] The present invention also proposes a water flosser, which includes a motor, a constant voltage detection circuit for detecting the water pressure output by the water flosser, a drive circuit for driving the motor, and the control device as described above. It is worth noting that since the water flosser of the present invention is based on the control device described above, the embodiments of the water flosser of the present invention include all the technical solutions of all the embodiments of the control device described above, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0084] refer to Figure 5 In one embodiment of the present invention, the water flosser further comprises:

[0085] A mode trigger circuit 20, wherein an output end of the mode trigger circuit 20 is electrically connected to the control device 10, and the mode trigger circuit 20 is used to output a mode trigger signal when triggered;

[0086] A driving circuit 30, wherein a controlled end of the driving circuit 30 is electrically connected to the constant voltage detection circuit 40, and the driving circuit 30 is used for detecting a pressure signal output by the constant voltage detection circuit 40;

[0087] a prompt circuit 50, wherein an input end of the prompt circuit 50 is electrically connected to the control device 10, and the prompt circuit 50 is used to output a prompt signal according to a prompt control signal output by the control device 10;

[0088] The output end of the constant voltage detection circuit 40 is electrically connected to the control device 10 and is used to output a detection signal; the control device 10 is also used to output a start signal or a stop signal according to the detection signal.

[0089] In this embodiment, the mode trigger circuit 20 includes a mode switching circuit and a power-on trigger circuit. Among them, both the mode switching circuit and the power-on trigger circuit can be composed of a button trigger component and a sensing circuit. The user can control the power on or off of the water flosser and the mode switching of the water flosser by triggering the button trigger component. The output end of the mode trigger circuit 20 is electrically connected to the control device 10 to output the mode trigger signal to the control device 10, so that the control device 10 outputs the corresponding drive signal to the drive circuit 30, thereby changing the drive mode of the motor.

[0090] In this embodiment, the drive circuit 30 can be implemented by multiple switch circuits, and the PWM signal output by the control device 1010 controls the conduction and shutdown of the switch circuit. The proportion of the switch circuit being turned on and off in one cycle is controlled by the duty cycle of the PWM signal. Specifically, the drive circuit 30 includes: a first switch circuit, a first end of the first switch circuit is electrically connected to the negative pole of the motor, and a controlled end of the first switch circuit is electrically connected to the main control circuit; a second switch circuit, a first end of the second switch circuit is electrically connected to the second end of the first switch circuit, a second end of the second switch circuit is electrically connected to the ground, and a controlled end of the second switch circuit is electrically connected to the controlled end of the first switch circuit; wherein the first switch circuit and the second switch circuit are both used to conduct or disconnect the path between the negative pole of the motor and the ground. Further, the first switch circuit includes a first switch tube and a first resistor; the second switch circuit includes a second switch tube and a second resistor; wherein the first end of the first resistor is electrically connected to the main control circuit, the second end of the first resistor is electrically connected to the controlled end of the first switch tube, the controlled end of the second switch tube, and the first end of the second resistor; the second end of the second resistor is electrically connected to the ground end; the first end of the first switch tube is electrically connected to the first end of the second switch tube and the negative pole of the motor, and the second end of the first switch tube is electrically connected to the second end of the second switch tube. The switch tube can be implemented by, for example, a MOS tube, an IGBT tube, a thyristor, a triode, a power tube, etc. It can be understood that the first end of the first switch tube and the second switch tube are electrically connected to the negative pole of the motor, and the second end of the first switch tube and the second switch tube are electrically connected to the ground end. Among them, the first switch tube and the second switch tube are arranged in parallel to achieve the technical effect of shunt conduction. In addition, by setting the first switch tube and the second switch tube, the stability of the switch tube operation is effectively improved, and the possibility of damage to the switch tube is greatly reduced. The controlled ends of the first switch tube and the second switch tube connect or disconnect the path between the negative pole and the ground terminal of the motor by receiving the driving signal output by the control device 10, thereby realizing the control of the motor power path. When the current detection circuit detects that the working state of the motor is abnormal, the control device 10 will control the switch circuit to disconnect the path between the negative pole and the ground terminal of the motor according to the current detection signal. The prompt circuit 50 can be implemented by an LED prompt circuit 50 or a vibration prompt circuit 50.

[0091] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A protection and control method for a water flosser, characterized in that: The water flosser comprises a motor, a constant pressure detection circuit for detecting the output water pressure of the water flosser, and a driving circuit for driving the motor to work, and the method comprises: responding to a mode trigger signal and confirming a target drive mode corresponding to the motor according to the mode trigger signal; Acquire a detection signal of the output water pressure of the oral irrigator, and confirm the current working state of the oral irrigator according to a matching relationship between a pressure value corresponding to the detection signal and a preset pressure range of a target driving mode of the motor; Under the condition that the pressure value corresponding to the detection signal does not match the preset pressure range of the target driving mode of the motor, the enable control signal output to the drive circuit is stopped, the enable control module program is reset, and the drive signal is output again to ensure that the output water pressure of the oral irrigator is within the preset pressure range corresponding to the target driving mode.

2. The method according to claim 1, characterized in that The oral irrigator further comprises a mode switching circuit and a power-on trigger circuit, wherein the mode switching circuit is used to output a mode switching signal when triggered, and the power-on trigger circuit is used to output a power-on signal when triggered; wherein the mode trigger signal comprises a power-on signal and a mode switching signal; the oral irrigator is provided with a plurality of drive modes corresponding to the motor, and the plurality of drive modes are arranged in a first order; the steps of responding to the mode trigger signal and confirming the target drive mode corresponding to the motor according to the mode trigger signal are specifically as follows: In response to the power-on signal, confirming that the current driving mode is the target driving mode; In response to the mode switching signal, a driving mode subsequent to the current driving mode is confirmed as the target driving mode according to the first sequence.

3. The method according to claim 2, characterized in that The constant pressure detection circuit is a pressure detection circuit, characterized in that the pressure detection circuit is arranged in the liquid output path of the oral irrigator, and the specific steps of obtaining the detection signal of the water pressure output by the oral irrigator and confirming the current working state of the oral irrigator according to the matching relationship between the pressure value corresponding to the detection signal and the preset pressure range of the target driving mode of the motor are as follows: Obtaining a pressure value corresponding to a pressure detection signal of the water pressure output by the oral irrigator, and confirming a preset pressure range corresponding to the target driving mode according to the target driving mode of the motor; Under the condition that the output water pressure corresponding to the pressure detection signal is within the preset pressure range, confirming that the oral irrigator is in a normal working state; Under the condition that the output water pressure corresponding to the pressure detection signal is not within the preset pressure range, it is confirmed that the oral irrigator is in an abnormal working state.

4. The method according to claim 3, characterized in that When the output water pressure corresponding to the pressure detection signal is not within the preset pressure range, the step of confirming that the water flosser is in an abnormal working state specifically includes: Under the condition that the pressure value corresponding to the pressure detection signal is less than a preset pressure range, confirming that the oral irrigator is in an under-pressure working state; Under the condition that the pressure value corresponding to the pressure detection signal is greater than a preset pressure range, it is confirmed that the oral irrigator is in an over-pressure working state.

5. The method according to claim 4, characterized in that The driving signal is a PWM signal. After the step of confirming that the water flosser is in an undervoltage working state, the method includes: The duty cycle of the driving signal is adjusted to a target duty cycle so that the operating power of the motor is within a preset power range corresponding to the target driving mode.

6. The method according to claim 3, characterized in that The dental flosser further includes a prompt circuit, and when the pressure value corresponding to the detection signal does not match the preset pressure range of the target driving mode of the motor, the specific steps of stopping the output of the enable control signal to the drive circuit and resetting the enable control module program include: Under the condition that the pressure value corresponding to the pressure detection signal is not within the preset pressure range, it is confirmed that the oral irrigator is in an abnormal working state, and a stop prompt signal and a stop signal are output; According to the shutdown signal, stopping the driving circuit from working; Under the condition that the stop time reaches the first preset time, the resetting of the enabling control module program is completed.

7. The method according to claim 6, characterized in that After completing the step of resetting the enabling control module program under the condition that the stop duration reaches the first preset duration, the method further includes: Confirm that the oral irrigator is in normal working state, and output a power-on prompt signal and a power-on signal; According to the power-on signal, the drive circuit is controlled to work so that the drive circuit outputs a drive signal to the motor again.

8. A control device, characterized in that: The control device includes: a memory, a processor, and a water flosser control program stored in the memory and running on the processor, wherein the water flosser control program is configured to implement the steps of the water flosser protection control method as described in any one of claims 1 to 7.

9. A water flosser, characterized in that: The oral irrigator includes a motor, a constant pressure detection circuit for detecting the water pressure output by the oral irrigator, a driving circuit for driving the motor to work, and the control device as described in claim 8.

10. The oral rinser according to claim 9, characterized in that: The dental flosser also includes: A mode trigger circuit, wherein an output end of the mode trigger circuit is electrically connected to the control device, and the mode trigger circuit is used to output a mode trigger signal when triggered; A driving circuit, wherein a controlled end of the driving circuit is electrically connected to the constant voltage detection circuit, and the driving circuit is used for detecting a pressure signal output by the constant voltage detection circuit; a prompt circuit, wherein an input end of the prompt circuit is electrically connected to the control device, and the prompt circuit is used to output a prompt signal according to a prompt control signal output by the control device; Wherein, the output end of the constant voltage detection circuit is electrically connected to the control device and is used to output a detection signal; the control device is also used to output a start signal or a stop signal according to the detection signal.

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