An ultrasonic debrider and its control method and device

Abstract

The present invention discloses an ultrasonic debrider and its control method and device applied to the technical field of medical devices. The control method includes: when a start ultrasonic debridement instruction is received, an alternating voltage with a preset frequency is connected to the piezoelectric ceramics in the debridement handle, so that the piezoelectric ceramics generate vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage; controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation; when a start high-pressure flushing instruction is received, controlling the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to the set liquid flow rate; controlling the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is used for cleaning. The ultrasonic debrider in this application has both the functions of ultrasonic cleaning and high-pressure flushing, and also recovers the waste liquid according to the flow rate of the cleaning liquid, improving the working performance of the ultrasonic debrider.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an ultrasonic debrider and its control method and device. Background Art

[0002] An ultrasonic debrider is a technology of ultrasonic loading jet flow. It utilizes the cavitation effect generated by ultrasonic waves in the flushing jet flow. Through the micro-jet flow generated by the collapse of ultrasonic cavitation bubbles and the pressure up to 100 Pa, it removes bacteria, fungi, viruses, and necrotic tissues on the surface and deep layer of the wound and wound surface, can also destroy the biofilm of bacteria, has an antibacterial effect, can improve the activity of antibiotics, and also has the effects of promoting fibrin to improve blood circulation and dilating blood vessels.

[0003] However, in the actual use process of conventional ultrasonic debriders at present, there are still various inconveniences, and there is still a large room for improvement in the use performance. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultrasonic debrider and its control method and device, which improve the working performance of the ultrasonic debrider to a certain extent.

[0005] To solve the above technical problems, the present invention provides a control method for an ultrasonic debrider, including:

[0006] When receiving a start ultrasonic debridement instruction, connect an alternating voltage with a preset frequency to the piezoelectric ceramic in the debridement handle, so that the piezoelectric ceramic generates vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage; control the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation;

[0007] When receiving a start high-pressure flushing instruction, control the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to the set liquid flow rate and set pressure;

[0008] Control the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recycle the waste liquid after the cleaning liquid is cleaned.

[0009] Optionally, controlling the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle includes:

[0010] Determine the negative pressure of the negative pressure pump according to the negative pressure formula P = K·Q and the liquid flow rate; where P is the negative pressure of the negative pressure pump, K is a constant coefficient, and Q is the liquid flow rate.

[0011] Optionally, it further includes:

[0012] Monitor the liquid level height in the liquid storage tank connected to the negative pressure pump; wherein, the liquid storage tank is used to store the liquid adsorbed by the negative pressure pump;

[0013] When the liquid level height reaches the set height, an alarm is issued.

[0014] Optionally, when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation, it further includes:

[0015] Receive a frequency switching instruction, and switch the frequency gear of the preset frequency of the AC voltage according to the frequency switching instruction.

[0016] Optionally, when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation, it further includes:

[0017] Real-time detect the current signal after the piezoelectric ceramic is connected to the AC voltage;

[0018] According to the current signal, use a phase-locked loop circuit to feedback-regulate the connected AC voltage of the piezoelectric ceramic, so that the vibration frequency of the piezoelectric ceramic reaches the set frequency.

[0019] Optionally, when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation, it further includes:

[0020] Receive a flow rate switching instruction, and switch the flow rate gear of the cleaning liquid output after ultrasonic cavitation by the nozzle according to the flow rate switching instruction.

[0021] Optionally, it further includes:

[0022] When starting ultrasonic debridement, record the first working duration of the piezoelectric ceramic being connected to the AC voltage; when the working duration reaches the first preset duration, stop powering the piezoelectric ceramic;

[0023] When starting high-pressure flushing, record the second working duration of the high-pressure water pump; when the second working duration reaches the second preset duration, control the high-pressure water pump to stop working.

[0024] Optionally, controlling the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to the set liquid flow rate and set pressure includes:

[0025] According to the liquid flow rate of the cleaning liquid output from the nozzle and the liquid pressure formula Determine the liquid pressure of the cleaning liquid output; where p is the liquid pressure, q is the liquid flow rate, and d is the output port diameter of the nozzle;

[0026] Adjust the set power of the high-pressure water pump according to the liquid pressure feedback to control the liquid pressure of the output cleaning liquid within the set pressure range.

[0027] A control device for an ultrasonic debridement instrument, comprising:

[0028] A first control module, configured to, when receiving a start ultrasonic debridement instruction, connect an alternating voltage with a preset frequency to a piezoelectric ceramic in a debridement handle, so that the piezoelectric ceramic generates vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage; control the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation;

[0029] A second control module, configured to, when receiving a start high-pressure flushing instruction, control the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to a set liquid flow rate and a set pressure;

[0030] A third control module, configured to control the negative pressure of a negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is cleaned.

[0031] An ultrasonic debridement instrument, comprising:

[0032] A debridement handle for outputting cleaning liquid; a piezoelectric ceramic for ultrasonic cavitation of the cleaning liquid is built in the debridement handle, and a high-pressure water pump for driving the high-pressure output of the cleaning liquid is built in;

[0033] A negative pressure adsorption component for adsorbing the waste liquid after the cleaning liquid is cleaned; the negative pressure adsorption component is connected with a negative pressure pump;

[0034] A controller, configured to execute the operation steps of the control method of the ultrasonic debridement instrument described in any one of the above, so as to control the debridement handle to output cleaning liquid.

[0035] The control method of the ultrasonic debridement instrument provided by the present invention includes: when receiving a start ultrasonic debridement instruction, connecting an alternating voltage with a preset frequency to a piezoelectric ceramic in a debridement handle, so that the piezoelectric ceramic generates vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage; controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation; when receiving a start high-pressure flushing instruction, controlling the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to a set liquid flow rate; controlling the negative pressure of a negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is cleaned.

[0036] The ultrasonic debrider in this application has a piezoelectric ceramic that generates vibrations after being connected to an AC voltage, and can thus perform ultrasonic cavitation on the cleaning liquid; it also has a high-pressure water pump that can pressurize and output the cleaning liquid; thus enabling the ultrasonic debrider to have both the function of cleaning the wound with the cleaning liquid after ultrasonic cavitation and the function of high-pressure flushing of the wound; on this basis, a negative pressure pump is further used to suck and recycle the waste liquid according to the liquid flow rate of the cleaning liquid output by the debrider handle, thus avoiding the problem that the waste liquid cannot be recycled cleanly due to insufficient negative pressure power of the negative pressure pump, or secondary damage to the wound caused by excessive negative pressure; to a certain extent, the working performance of the ultrasonic debrider is improved, which is conducive to the wide application of the ultrasonic debrider.

[0037] This application also provides an ultrasonic debrider and its control device, which have the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic flow chart of the control method of the ultrasonic debrider provided by the embodiment of this application;

[0040] Figure 2 It is a schematic flow chart of the ultrasonic debridement control process provided by the embodiment of this application;

[0041] Figure 3 It is a schematic flow chart of the high-pressure flushing control process provided by the embodiment of this application;

[0042] Figure 4 It is a schematic flow chart of the negative pressure recovery waste liquid control process provided by the embodiment of this application;

[0043] Figure 5 It is a structural block diagram of the control device of the ultrasonic debrider provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the following will further elaborate on the present invention in conjunction with the drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0045] Such asFigure 1 As shown Figure 1 is a schematic flowchart of a control method for an ultrasonic debrider provided by an embodiment of the present application; the control method of the ultrasonic debrider may include:

[0046] S10: When a start ultrasonic debridement instruction is received, apply an alternating voltage with a preset frequency to the piezoelectric ceramic in the debridement handle, so that the piezoelectric ceramic generates vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage.

[0047] A piezoelectric ceramic is a component that can undergo different degrees of expansion and contraction when different magnitudes of voltage are applied; when an alternating voltage is applied to the piezoelectric ceramic, the piezoelectric ceramic also generates periodic vibrations accordingly; the piezoelectric ceramic in this vibration state can generate ultrasonic waves with a certain frequency, and the ultrasonic waves can be used to perform ultrasonic cavitation on the cleaning liquid.

[0048] During the energized vibration process of the piezoelectric ceramic, the vibration frequency of the piezoelectric ceramic is related to the frequency of the alternating voltage; and the frequency of the alternating voltage when the vibration frequency of the piezoelectric ceramic reaches the maximum is the resonant frequency of the piezoelectric ceramic.

[0049] The closer the frequency of the alternating voltage applied to the piezoelectric ceramic is to the resonant frequency, the greater the vibration frequency of the piezoelectric ceramic; conversely, the greater the difference between the frequency of the alternating voltage applied to the piezoelectric ceramic and the resonant frequency, the smaller the vibration frequency of the piezoelectric ceramic; once the alternating voltage applied to the piezoelectric ceramic exceeds a certain frequency range near the resonant frequency, the piezoelectric ceramic will not be able to vibrate.

[0050] Therefore, in practical applications, when starting the ultrasonic debridement function of the ultrasonic debrider, it is necessary to set the preset frequency of the alternating voltage applied to the piezoelectric ceramic within a certain range around the resonant frequency of the piezoelectric ceramic.

[0051] S11: Control the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation.

[0052] After the cleaning liquid undergoes cavitation under the action of ultrasonic waves generated by the piezoelectric ceramic, it can be output from the nozzle of the debridement handle through the drive of a pressure water pump.

[0053] As mentioned above, when the piezoelectric ceramic is applied with alternating voltages of different frequencies, its vibration frequencies are also different accordingly. And different vibration frequencies of the piezoelectric ceramic result in different ultrasonic frequencies generated, and the ultrasonic cavitation effect on the cleaning liquid is also different accordingly.

[0054] It can be understood that in practical applications, due to the need for cleaning different types of wounds, the requirements for the cavitation degree of the cleaning liquid often vary. Therefore, in practical applications, multiple adjustable gears can be set for the preset frequency of the alternating voltage applied to the piezoelectric ceramic to adjust the cavitation degree of the cleaning liquid, making the cavitation degree of the cleaning liquid more in line with the actual cleaning needs.

[0055] Based on the foregoing discussion, the closer the preset frequency of the alternating voltage applied to the piezoelectric ceramic is to the resonant frequency of the piezoelectric ceramic, the greater the vibration frequency of the piezoelectric ceramic and the higher the cavitation degree of the cleaning liquid. Therefore, in the actual application process, multiple preset frequencies of different frequency gears corresponding to different cavitation degrees can be preset; when the debridement handle outputs the cleaning liquid, the frequency gear of the preset frequency of the alternating voltage of the piezoelectric ceramic can be switched at any time based on the actual cleaning needs to meet the cleaning requirements.

[0056] Furthermore, considering that in the process of controlling the vibration frequency of the piezoelectric ceramic, it is achieved based on the one-to-one correspondence between the vibration frequency and the frequency of the alternating voltage. However, the correspondence between the two frequencies is determined under theoretical conditions. In practical applications, due to tooling errors or other reasons, the correspondence between the vibration frequency and the frequency of the alternating voltage is not accurate; that is, even if the alternating voltage applied to the piezoelectric ceramic can reach the set requirements, the vibration frequency of the piezoelectric ceramic may deviate from the set vibration frequency, and thus the cavitation effect corresponding to the preset frequency does not meet the expected requirements.

[0057] Therefore, in an optional embodiment of the present application, it may further include:

[0058] Real-time detect the current signal after the piezoelectric ceramic is applied with an alternating voltage;

[0059] According to the current signal, use a phase-locked loop circuit to adjust the alternating voltage applied to the piezoelectric ceramic so that the vibration frequency of the piezoelectric ceramic reaches the set frequency.

[0060] During the vibration process of the piezoelectric ceramic when an alternating voltage is applied, the corresponding current signal and the vibration frequency of the piezoelectric ceramic have a certain correspondence; thus, it is possible to indirectly determine whether the vibration frequency of the piezoelectric ceramic meets the requirements based on the current signal of the piezoelectric ceramic.

[0061] On this basis, the current signal of the piezoelectric ceramic is used as a feedback signal to regulate the frequency of the alternating voltage of the piezoelectric ceramic. Taking the example that the frequency of the alternating voltage of the piezoelectric ceramic is controlled by a phase-locked loop circuit, this current signal can be transformed through a certain circuit to form an activation voltage signal of the phase-locked loop circuit. It can be understood that different current signals can obtain different activation voltage signals, and different activation voltage signals will generate alternating voltages with different frequencies after passing through the phase-locked loop circuit. When the piezoelectric ceramic is connected to alternating voltages with different frequencies, vibrations with corresponding frequencies can be generated.

[0062] It can be understood that the phase-locked loop circuit is a relatively common circuit structure in the art, and thus will not be introduced in detail in this embodiment. In addition, in this embodiment, the current of the piezoelectric ceramic is used as the feedback signal to stimulate the phase-locked loop circuit to finely adjust the frequency of the alternating voltage of the piezoelectric ceramic. However, in practical applications, it does not exclude other feedback regulation methods such as PID regulation to achieve the regulation of the frequency of the alternating voltage of the piezoelectric ceramic.

[0063] Based on the above discussion, there can be two aspects of regulation for the frequency regulation of the alternating voltage of the piezoelectric ceramic. On the one hand, it is the regulation of different gears. Based on the need to meet different cleaning requirements, different frequency gears are set. During actual use, users can randomly switch the required frequency gear to control the output of cleaning liquid with different cavitation effects. On the other hand, the size of the frequency of each specific gear is feedback finely adjusted by detecting the current signal of the piezoelectric ceramic to ensure that the actual vibration frequency of the piezoelectric ceramic is more consistent with the set vibration frequency and avoid errors in the vibration frequency of the piezoelectric ceramic.

[0064] Based on the above two different regulation methods for the alternating voltage frequency of the piezoelectric ceramic, it is ensured that the cavitation effect of the finally output cleaning liquid can just meet the actual cleaning requirements and guarantee the cleaning effect.

[0065] Optionally, in order to further achieve a better cleaning effect, the liquid flow rate of the cleaning liquid output by the debridement handle after ultrasonic cavitation can also be regulated. Obviously, during the actual cleaning of physiological tissues, based on the size of the cleaning wound surface, different flow rates of the cleaning liquid can be set. During actual cleaning, users can randomly perform operations to switch the flow rate. Correspondingly, after receiving the flow rate switching instruction output by the user, the debridement handle can switch the flow rate gear of the cleaning liquid output by the nozzle. Obviously, different flow rate gears correspond to different liquid flow rates. The size of this liquid flow rate can be controlled by a water pump that drives the output of the cleaning liquid, or can also be regulated by controlling the opening of a water valve on the fluid channel for the output of the cleaning liquid. In this regard, no specific limitations are made in this application.

[0066] S20: When a high-pressure flushing instruction is received, the high-pressure water pump in the debridement handle is controlled to drive the cleaning liquid to output according to the set liquid flow rate and set pressure.

[0067] The high-pressure flushing function of the ultrasonic debrider is mainly to meet the cleaning of pollutants on the relatively less or shallower epidermis of the wound. Compared with the cleaning liquid after ultrasonic cavitation, the water pressure of the cleaning liquid output during high-pressure flushing is greater.

[0068] It can be understood that, similar to the above-mentioned ultrasonic cavitation cleaning liquid, for the cleaning liquid output in a high-pressure state, multiple different pressure grades can also be set; the user can operate and input an instruction to switch the pressure grade based on actual application needs. After the controller of the debridement handle receives the corresponding pressure grade instruction, it can control the stepping power of the motor of the high-pressure water pump, and then realize the size of the pressure of the cleaning liquid output.

[0069] On the basis that the water pressure grade of the cleaning liquid is adjustable, in order to ensure the accuracy of the water pressure control of the cleaning liquid output, the size of the pressure of the output cleaning liquid can be further detected. However, the nozzle diameter of the cleaning liquid output by the debridement handle is relatively small. Therefore, it is relatively difficult to install a pressure sensor at the nozzle position. For this reason, in an optional embodiment of the present application, it may further include:

[0070] Determine the liquid pressure of the cleaning liquid output according to the liquid flow rate and liquid pressure formula of the cleaning liquid output from the nozzle where p is the liquid pressure, q is the liquid flow rate, and d is the output port diameter of the nozzle;

[0071] Adjust the set power of the high-pressure water pump according to the liquid pressure feedback to control the liquid pressure of the cleaning liquid output within the set pressure range.

[0072] For the liquid pressure formula in this embodiment, it is derived and determined based on Bernoulli's law, which will not be elaborated in detail in this embodiment. Based on the above liquid pressure formula, as long as the liquid flow rate of the cleaning liquid output from the nozzle is determined, and the diameter of the nozzle is fixed, the liquid pressure of the cleaning liquid output from the nozzle can be calculated based on this liquid pressure formula. Of course, it can be understood that it is not necessarily required to measure the liquid flow rate of the cleaning liquid output at the nozzle position. The fluid flow velocity can be measured at the water pipe position where the cleaning liquid is conveyed to the nozzle position. Based on the fluid flow velocity, the liquid flow rate of the cleaning liquid flowing in the water pipe can obviously be deduced, and the liquid flow rate of the water pipe is equal to the liquid flow rate output at the nozzle, thereby determining the pressure of the cleaning liquid output at the nozzle.

[0073] When determining that the liquid pressure of the cleaning liquid output by the nozzle should be within a certain pressure range centered on the set pressure, if the liquid pressure exceeds this pressure range, the motor power of the high-pressure water pump can be adjusted, so that the output pressure of the cleaning liquid finally reaches the expected value.

[0074] Optionally, similar to the above-mentioned cleaning liquid that outputs ultrasonic cavitation, when the cleaning liquid is output in a high-pressure state, the flow rate of the output cleaning liquid can also be switched and adjusted based on different cleaning requirements.

[0075] Optionally, for the debridement handle, the cleaning liquid after ultrasonic cavitation output and the cleaning liquid in a high-pressure state output can both be output by the same nozzle. Thus, the cleaning liquid output by the debridement handle can be the cleaning liquid after ultrasonic cavitation or the cleaning liquid in a high-pressure state, and two different states of cleaning liquid can be switched and output in actual applications.

[0076] S30: Control the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is used for cleaning.

[0077] The ultrasonic debridement instrument is generally used in situations with high environmental requirements such as operating rooms. A large amount of waste liquid will inevitably be generated after the cleaning liquid is used to clean physiological tissues. On the one hand, in order to avoid secondary pollution caused by the biological tissues to be cleaned being soaked by the waste liquid, and on the other hand, in order to ensure the cleanliness of the operating environment, the waste liquid can be recovered by negative pressure adsorption.

[0078] It can be understood that when cleaning the waste liquid generated by the cleaning liquid for cleaning physiological tissues, the output process of the cleaning liquid and the process of waste liquid recovery should be carried out synchronously.

[0079] As described above, whether the debridement handle outputs the cleaning liquid after ultrasonic cavitation or the cleaning liquid in a high-pressure state, the magnitude of the liquid flow rate is adjustable. Thus, it can be seen that the liquid flow rate of the cleaning liquid output by the debridement handle is not necessarily constant. In order to better recover the waste liquid, in this embodiment, when controlling the negative pressure pump to extract the waste liquid, the power of the negative pressure pump can be controlled and adjusted based on the magnitude of the liquid flow rate of the cleaning liquid output by the debridement handle, that is, the adsorption force of the negative pressure pump is adjusted, so that the adsorption force of the negative pressure pump matches the speed of waste liquid generation, and then the speed of the negative pressure pump recovering the waste liquid is basically the same as the speed of waste liquid generation, ensuring that the waste liquid can be completely recovered and avoiding unnecessary work done by the negative pressure pump.

[0080] In addition, after the waste liquid is absorbed from the surface of the biological tissue by the negative pressure pump, it needs to be discharged into the liquid storage tank for storing the waste liquid. For this purpose, in an optional embodiment of the present application, it may further include:

[0081] Monitor the liquid level height in the liquid storage tank connected to the negative pressure pump; wherein, the liquid storage tank is used to store the liquid adsorbed by the negative pressure pump; when the liquid level height reaches the set height, an alarm is issued.

[0082] Obviously, the liquid level height in the liquid storage tank reflects the remaining space in the liquid storage tank to a certain extent. The higher the liquid level height in the liquid storage tank, the smaller the remaining space in the liquid storage tank; for this reason, a threshold value of the height can be further set. When the service height in the liquid storage tank reaches the set height, an alarm is issued so that the staff can replace the new liquid storage tank in time.

[0083] For the threshold value of the set height, a fixed height threshold can be set based on actual experience, or it can be considered to be set based on the working power of the negative pressure pump. The faster the negative pressure pump extracts and recovers the waste liquid, the smaller the height threshold. On the contrary, the slower the waste liquid recovery speed, the larger the size of the height threshold can be.

[0084] Optionally, in another specific embodiment of the present application, it may further include:

[0085] When starting ultrasonic debridement, record the first working duration of applying an alternating voltage to the piezoelectric ceramic; when the working duration reaches the first preset duration, stop powering the piezoelectric ceramic;

[0086] When starting high-pressure flushing, record the second working duration of the high-pressure water pump; when the second working duration reaches the second preset duration, control the high-pressure water pump to stop working.

[0087] In this embodiment, it is further considered that if the debridement handle continuously outputs the cleaning liquid for too long, it will greatly increase the failure probability of the ultrasonic debrider to a large extent, and also avoid unnecessary waste of the cleaning liquid caused by the user forgetting to turn off the debridement handle. For this reason, in this embodiment, the duration of the output liquid can be recorded during the output process of the cleaning liquid. On the one hand, it can be recorded as the cleaning data of the debridement handle, providing a data basis for the subsequent maintenance of the ultrasonic debrider. On the other hand, it can avoid the debridement handle from working continuously for too long, which is beneficial to maintaining the good working state of the ultrasonic debrider.

[0088] In summary, the ultrasonic debrider in the present application can vibrate the piezoelectric ceramic according to the set alternating voltage based on the actual cleaning needs, so as to make the cleaning liquid generate cavitation effect, ensuring the good cleaning effect of the cleaning liquid; in addition, it also has the function of high-pressure output of the cleaning liquid to meet the different cleaning needs of users for biological tissues; on this basis, it can further recover the waste liquid based on the liquid flow rate of the output cleaning liquid, which is beneficial to the complete and effective recovery of the waste liquid and improves the working performance of the ultrasonic debrider.

[0089] Based on the above discussion, in a specific embodiment of the present application, the ultrasonic debridement function can be enabled on the human-machine interaction interface for ultrasonic debridement. Refer to Figure 2 , the enabling of the ultrasonic debridement function, the adjustment of the liquid flow rate, and the working power do not interfere with each other. That is, the liquid output flow rate can be adjusted first, or the working power can be adjusted first.

[0090] The liquid flow rate can be adjusted by the "+" and "-" of the flow rate button. When the device is powered on for the first time, the default flow rate gear is gear 1. Pressing the "+" button can increase one gear, with a maximum of 5 gears, and pressing the "-" button can decrease one gear, with a minimum of 1 gear. After each flow rate gear is set, it is saved to the FLASH of the MCU. The next time the device is powered on, it can be the flow rate gear set last time, or the default gear 1. After the MCU receives the adjustment instruction input through the flow rate button, it can output a PWM signal according to the set flow rate gear to control the corresponding water pump motor to work, so as to achieve the purpose of flow rate control.

[0091] The gear adjustment of the vibration power of the piezoelectric ceramic is the same as the adjustment method of the liquid flow rate. The upper limit of the vibration power can be 3 gears, and the lower limit is 1 gear. After each power gear is set, it is saved to the FLASH of the MCU. The next time the device is powered on, it is the power gear set last time. It can be understood that the vibration power of the piezoelectric ceramic is actually determined based on the power of the alternating current voltage connected to the piezoelectric ceramic. When the MCU receives the power adjustment instruction, it can adjust the alternating current voltage of the piezoelectric ceramic to the corresponding gear, and then make the piezoelectric ceramic vibrate at different frequencies to achieve the gear adjustment of the vibration power.

[0092] When the ultrasonic debridement function is enabled, the timer of the MCU is started for timing. When the timing time reaches a certain set value, or after the operator manually turns off the ultrasound, first read the running time saved last time from the FLASH, then add the running time of this time, and save it to the FLASH for subsequent maintenance personnel to maintain the device.

[0093] In another optional embodiment of the present application, the process of the high-pressure flushing function can be as Figure 3 shown. The high-pressure flushing function includes processes such as pressure detection, flow rate adjustment, and running time recording. Since the pressure at the nozzle outlet of the cleaning handle is relatively large during high-pressure flushing, it is necessary to monitor the pressure of the nozzle in real time to prevent the wound on the physiological tissue from being damaged due to excessive pressure. However, since the nozzle of the debridement handle is too small during high-pressure flushing, there is no suitable pressure sensor or other equipment that can detect the pressure of the nozzle; according to Bernoulli's equation, jet velocity, and jet flow rate, it is deduced that the pressure at the nozzle and the flow rate in the hose conform to a certain relationship, that is where q is the liquid flow rate in the hose, d is the diameter of the nozzle, and p is the fluid pressure at the nozzle position.

[0094] Therefore, by simply detecting the liquid flow rate in the hose, the fluid pressure at the nozzle can be obtained. When the detected fluid pressure at the nozzle is greater than a given value, the motor power of the high-pressure water pump is automatically adjusted to reduce the magnitude of the fluid pressure, or an alarm is issued to remind the operator to adjust manually.

[0095] The adjustment of the liquid flow rate during the high-pressure flushing function is the same as that during the ultrasonic debridement function. The liquid flow rate can also be adjusted in terms of gear levels by operating the corresponding flow rate button. However, due to the relatively high pressure of the high-pressure flushing, the number of liquid flow rate adjustment gears during the high-pressure flushing function is 5 more than that during the ultrasonic debridement function, with a range from 1 to 15 gears. In addition, the operating time of the high-pressure flushing is the same as that of the ultrasonic debridement, and will not be elaborated here.

[0096] When the high-pressure flushing function is turned on, the timer of the MCU can also be turned on for timing. When the timing reaches a certain set value, or after the operator manually turns off the high-pressure flushing function, first read the previously saved operating time from the FLASH, then add the operating time of this time, and save it to the FLASH.

[0097] In another alternative embodiment of the present application, the flowchart of the negative pressure suction of waste liquid is as Figure 4 shown. The negative pressure suction process includes two parts: negative pressure pump control and liquid level sensor detection. The negative pressure pump can be a miniature vacuum pump. The negative pressure of the miniature vacuum pump for the negative pressure suction function can be adjusted manually by the operator or the negative pressure can be calculated from the liquid flow rate of the cleaning liquid output by the debridement handle. The relationship between the negative pressure and the liquid flow rate satisfies P = K·Q, where P is the negative pressure of the negative pressure pump, K is a constant coefficient, and Q is the liquid flow rate. The coefficient K can be obtained by averaging through multiple tests.

[0098] The calculation of the K value can be obtained through experiments. For example, set the liquid flow rate output by the debridement handle per unit time as Q1, then place the debridement handle and the suction pipe of the negative pressure suction into the same container, and at the same time set the negative pressure P1 output by the negative pressure pump to the suction pipe and turn on the negative pressure suction to observe the change of the liquid in the container. If the liquid level in the container remains unchanged and the liquid volume decreases at a relatively slow speed, it means that the negative pressure P1 and the liquid flow rate Q1 at this time are matched. Then record the current Q1 and P1, calculate K1, test N times, and obtain the average value. If the liquid level rises or drops too fast, then change the negative pressure of the negative pressure pump until the liquid level remains unchanged or drops slowly. Thus, the corresponding relationship between the liquid flow rate speed output by a debridement handle and the negative pressure can be determined. Correspondingly, when the user adjusts the liquid flow rate of the debridement handle to a corresponding gear, the negative pressure of the negative pressure pump can be adjusted accordingly according to the corresponding relationship between the negative pressure and the liquid flow rate. After determining the negative pressure of the negative pressure pump, the pumping rate of the vacuum pump can be controlled by the PWM duty cycle sent by the MCU.

[0099] The liquid level sensor detection can send the waste liquid level in the liquid storage tank to the LCD for display in real time through the MCU, so that the operator can observe the liquid content in the liquid storage tank and prevent the waste liquid from overflowing the liquid storage tank. The liquid level sensor can be composed of a pressure sensor and a communication interface. The pressure sensor can measure the current weight of the liquid storage tank, upload the weight data to the MCU, and calculate the liquid level height in the current liquid storage tank by the MCU based on h = m / (ρ·S), where m is the weight data, ρ is the waste liquid density in the liquid storage tank, and S is the cross-sectional area of the liquid storage tank. Due to the measurement error of the liquid storage tank size and the signal transmission delay, h needs to be multiplied by a coefficient a, that is, the final liquid level height is H = a·h = a·m / (ρ·S).

[0100] The control device of the ultrasonic debridement instrument provided by the embodiments of the present invention will be introduced below. The control device of the ultrasonic debridement instrument described below can be mutually corresponding and referred to the control method of the ultrasonic debridement instrument described above.

[0101] Figure 5 is the structural block diagram of the control device of the ultrasonic debridement instrument provided by the embodiments of the present invention. Refer to Figure 5 The control device of the ultrasonic debridement instrument can include:

[0102] The first control module 100 is used for when receiving the start ultrasonic debridement instruction, connecting an AC voltage with a preset frequency to the piezoelectric ceramic in the debridement handle, so that the piezoelectric ceramic generates vibration for ultrasonic cavitation of the cleaning liquid under the excitation of the AC voltage; controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation;

[0103] The second control module 200 is configured to control the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to a set liquid flow rate and a set pressure when a high-pressure flushing instruction is received;

[0104] The third control module 300 is configured to control the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is cleaned.

[0105] In an optional embodiment of the present application, the third control module 300 is specifically configured to determine the negative pressure of the negative pressure pump according to the negative pressure formula P = K·Q and the liquid flow rate; where P is the negative pressure of the negative pressure pump, K is a constant coefficient, and Q is the liquid flow rate.

[0106] In an optional embodiment of the present application, a liquid level monitoring module is further included, which is configured to monitor the liquid level height in the liquid storage tank connected to the negative pressure pump; wherein, the liquid storage tank is used to store the liquid adsorbed by the negative pressure pump; when the liquid level height reaches a set height, an alarm is issued.

[0107] In an optional embodiment of the present application, the first control module 100 is further configured to receive a frequency switching instruction and switch the frequency gear of the preset frequency of the AC voltage according to the frequency switching instruction when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation.

[0108] In an optional embodiment of the present application, the first control module 100 is further configured to detect the current signal of the piezoelectric ceramic after connecting the AC voltage in real time when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation; according to the current signal, use a phase-locked loop circuit to feedback-regulate the connected AC voltage of the piezoelectric ceramic so that the vibration frequency of the piezoelectric ceramic reaches a set frequency.

[0109] In an optional embodiment of the present application, the first control module 100 is further configured to receive a flow rate switching instruction and switch the flow rate gear of the cleaning liquid output after ultrasonic cavitation of the nozzle according to the flow rate switching instruction when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation.

[0110] In an optional embodiment of the present application, a time recording module is further included, which is configured to record the first working duration of the piezoelectric ceramic connected to the AC voltage when ultrasonic debridement is started; when the working duration reaches a first preset duration, power off the piezoelectric ceramic; when high-pressure flushing is started, record the second working duration of the high-pressure water pump; when the second working duration reaches a second preset duration, control the high-pressure water pump to stop working.

[0111] In an alternative embodiment of the present application, the second control module 200 is configured to determine the liquid pressure of the cleaning liquid output according to the liquid flow rate and the liquid pressure formula of the cleaning liquid output from the nozzle. Where p is the liquid pressure, q is the liquid flow rate, and d is the output port diameter of the nozzle; the set power of the high-pressure water pump is feedback-regulated according to the liquid pressure to control the liquid pressure of the cleaning liquid output within a set pressure range.

[0112] The control device of the ultrasonic debridement instrument in this embodiment is used to implement the foregoing control method of the ultrasonic debridement instrument. Therefore, the specific implementation manners in the control device of the ultrasonic debridement instrument can be seen in the embodiment part of the control method of the ultrasonic debridement instrument in the foregoing text, and will not be elaborated here.

[0113] An embodiment of an ultrasonic debridement instrument is also provided in the present application. The ultrasonic debridement instrument may include:

[0114] A debridement handle for outputting cleaning liquid; a piezoelectric ceramic for ultrasonic cavitation of the cleaning liquid is built into the debridement handle, and a high-pressure water pump for driving the high-pressure output of the cleaning liquid is built in.

[0115] A negative pressure adsorption component for adsorbing the waste liquid after the cleaning liquid is cleaned; the negative pressure adsorption component is connected to a negative pressure pump.

[0116] A controller for executing the operation steps of the control method of the ultrasonic debridement instrument as described in any one of the foregoing to control the debridement handle to output the cleaning liquid.

[0117] The control method of the ultrasonic debridement instrument executed by the controller in the present application may include:

[0118] When a start ultrasonic debridement instruction is received, an alternating voltage with a preset frequency is connected to the piezoelectric ceramic in the debridement handle, so that the piezoelectric ceramic generates vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage; control the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation.

[0119] When a start high-pressure flushing instruction is received, control the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to a set liquid flow rate and a set pressure.

[0120] Control the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output from the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is cleaned.

[0121] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the elements inherent in a process, method, article or device comprising a series of elements. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element. In addition, the parts of the above technical solutions provided in the embodiments of the present application that are consistent with the corresponding technical solutions in the prior art are not described in detail to avoid excessive elaboration.

[0122] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A control device for an ultrasonic debrider, characterized in that, Comprising: A first control module, configured to, when receiving a start ultrasonic debridement instruction, connect an alternating voltage of a preset frequency to a piezoelectric ceramic in a debridement handle, so that the piezoelectric ceramic generates vibrations for ultrasonic cavitation of a cleaning liquid under the excitation of the alternating voltage; control a nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation; A second control module, configured to, when receiving a start high-pressure flushing instruction, control a high-pressure water pump in the debridement handle to drive the cleaning liquid to be output according to a set liquid flow rate and a set pressure; A third control module, configured to control a negative pressure of a negative pressure pump according to a liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover waste liquid after the cleaning liquid is used for cleaning; The third control module is specifically configured to determine the negative pressure of the negative pressure pump according to the negative pressure formula and the liquid flow rate, where P is the negative pressure of the negative pressure pump, K is a constant coefficient, and Q is the liquid flow rate; The second control module is used to determine the liquid pressure of the cleaning liquid output according to the liquid flow rate and the liquid pressure formula of the cleaning liquid output from the nozzle. , where p is the liquid pressure, q is the liquid flow rate, and d is the diameter of the output port of the nozzle; the set power of the high-pressure water pump is feedback-regulated according to the liquid pressure to control the liquid pressure of the cleaning liquid output within a set pressure range.

2. The control device of the ultrasonic debridement instrument according to claim 1, characterized in that, Further comprising a liquid level monitoring module, configured to monitor a liquid level height in a liquid storage tank connected to the negative pressure pump; wherein, the liquid storage tank is used for storing the liquid adsorbed by the negative pressure pump; when the liquid level height reaches a set height, an alarm is issued.

3. The control device of the ultrasonic debridement instrument according to claim 1, characterized in that, The first control module is further configured to, when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation, receive a frequency switching instruction, and switch a frequency gear of the preset frequency of the alternating voltage according to the frequency switching instruction.

4. The control device of the ultrasonic debridement instrument according to claim 1, characterized in that, The first control module is further configured to, when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation, detect a current signal of the piezoelectric ceramic after the alternating voltage is connected in real time; according to the current signal, use a phase-locked loop circuit to perform feedback adjustment on the connected alternating voltage of the piezoelectric ceramic, so that the vibration frequency of the piezoelectric ceramic reaches a set frequency.

5. The control device of the ultrasonic debridement instrument according to claim 1, characterized in that, The first control module is further configured to, when controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation, receive a flow rate switching instruction, and switch a flow rate gear of the cleaning liquid output after ultrasonic cavitation by the nozzle according to the flow rate switching instruction.

6. The control device of the ultrasonic debridement instrument according to claim 1, characterized in that, Further comprising a time recording module, configured to, when starting ultrasonic debridement, record a first working duration of the piezoelectric ceramic being connected to the alternating voltage; when the first working duration reaches a first preset duration, stop powering on the piezoelectric ceramic; When starting high-pressure flushing, record a second working duration of the high-pressure water pump; when the second working duration reaches a second preset duration, control the high-pressure water pump to stop working.

7. An ultrasonic debrider, characterized in that, Comprising: A debridement handle for outputting a cleaning liquid; the debridement handle is internally provided with a piezoelectric ceramic for ultrasonic cavitation of the cleaning liquid, and internally provided with a high-pressure water pump for driving the high-pressure output of the cleaning liquid; A negative pressure adsorption component for adsorbing waste liquid after the cleaning liquid is used for cleaning; the negative pressure adsorption component is connected with a negative pressure pump; A controller, configured to execute operation steps of a control method of an ultrasonic debridement instrument to control the debridement handle to output the cleaning liquid; The operation steps of the control method of the ultrasonic debrider include: when a start ultrasonic debridement instruction is received, an alternating voltage with a preset frequency is connected to the piezoelectric ceramics in the debridement handle, so that the piezoelectric ceramics generate vibrations for ultrasonic cavitation of the cleaning liquid under the excitation of the alternating voltage; controlling the nozzle of the debridement handle to output the cleaning liquid after ultrasonic cavitation; When a start high-pressure flushing instruction is received, the high-pressure water pump in the debridement handle is controlled to drive the cleaning liquid to output according to the set liquid flow rate and set pressure; The negative pressure of the negative pressure pump is controlled according to the liquid flow rate of the cleaning liquid output by the nozzle, so as to suck and recover the waste liquid after the cleaning liquid is cleaned; Among them, controlling the negative pressure of the negative pressure pump according to the liquid flow rate of the cleaning liquid output by the nozzle includes: According to the negative pressure formula and the liquid flow rate, determine the negative pressure of the negative pressure pump; where P is the negative pressure of the negative pressure pump, K is a constant coefficient, and Q is the liquid flow rate; Controlling the high-pressure water pump in the debridement handle to drive the cleaning liquid to output according to the set liquid flow rate and set pressure includes: According to the liquid flow rate and liquid pressure formula of the cleaning liquid output from the nozzle , determine the liquid pressure of the cleaning liquid output; where p is the liquid pressure, q is the liquid flow rate, and d is the diameter of the output port of the nozzle; The set power of the high-pressure water pump is adjusted according to the liquid pressure feedback to control the liquid pressure of the output cleaning liquid within the set pressure range.

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