Hydraulic detection device and method for medical oral irrigator

Abstract

The invention relates to the technical field of hydraulic detection, in particular to a hydraulic detection device and method for a medical oral irrigator, and the device comprises an operation handle, one end of the operation handle is provided with a detection cylinder, and the received water flow can flow out from the detection cylinder; the two rotating parts are arranged in the detection cylinder and are distributed along the axial direction of the detection cylinder, and the axis of each rotating part is coaxial with the axis of the detection cylinder; a first through hole is formed in the center of each rotating part, a guide groove is formed in the side wall of each first through hole, and an included angle is formed between each guide groove and the axis of the detection cylinder; a metal piece is further arranged on the outer side wall of each rotating piece; the two Hall detection elements are fixedly arranged on the outer side of the detection cylinder and correspond to the outer side walls of the two rotating parts respectively; the end cover is mounted on the detection cylinder and is used for blocking the detection cylinder; second through holes are formed in the centers of the end covers; and the nozzle is arranged on the end cover and is communicated with the second through hole. According to the invention, the flushing pressure of the oral irrigator can be effectively detected.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic pressure detection, and in particular to a hydraulic pressure detection device and method for a medical water flosser. Background Art

[0002] Medical water flossers are high-performance oral irrigation devices designed specifically for medical environments, such as Figure 1 As shown, compared with traditional water flossers, medical water flossers have specially designed pressurization and water pressure detection systems, which can flush for a longer time, have stronger cleaning ability and stricter hygiene standards, and are suitable for dental clinics, hospital oral departments or professional dentists.

[0003] Due to the different conditions of patients' teeth, the water pressure they can withstand varies. Therefore, it is necessary to control the water pressure during the flushing process to keep it in an appropriate range. During use, the sprayed water pressure will change under the influence of many factors. For example, raising the handle will reduce the water pressure. At this time, the water pressure will be obtained through the water pressure detection system to adjust the pressure of the water pump in time.

[0004] The water pressure detection system in existing medical water flossers usually needs to be installed on the main unit due to its structural limitations. This will cause the water pressure detection point to be too far away from the nozzle, resulting in an error between the detection value and the actual sprayed water pressure value, and the water pressure cannot be accurately controlled. Summary of the invention

[0005] The present invention provides a hydraulic pressure detection device and method for a medical water flosser, which can effectively solve the problems in the background technology.

[0006] The present invention provides a hydraulic pressure detection device for a medical water flosser, comprising: The operating handle is used to receive the water flow and is held by a person for operation; a detection cylinder is arranged at one end of the operating handle, and the received water flow will flow out from the detection cylinder; Two rotating members are placed in the detection cylinder and distributed along the axial direction of the detection cylinder, and the axis of each rotating member is coaxial with the axis of the detection cylinder; a first through hole is provided at the center of each rotating member, and a guide groove is provided on the side wall of the first through hole, and an angle is formed between the guide groove and the axis of the detection cylinder; a metal member is also provided on the outer side wall of each rotating member; Two Hall detection elements are fixedly arranged on the outside of the detection cylinder and correspond to the outer side walls of the two rotating parts respectively; The end cover is installed on the detection tube and is used to block the detection tube; a second through hole is arranged at the center of the end cover; The nozzle is arranged on the end cover and is communicated with the second through hole.

[0007] Furthermore, the outer wall of each rotating member is gap-matched with the inner wall of the detection cylinder; multiple metal parts are provided on each rotating member and are evenly distributed along the circumference of the rotating member; all metal parts are spherical structures and abut against the detection cylinder.

[0008] Furthermore, a plurality of balls are arranged on the end surface of each rotating member facing the nozzle, and the plurality of balls are evenly distributed along the circumference of the rotating member.

[0009] Furthermore, it also includes a sealing gasket, which is arranged between the detection cylinder and the end cover, and the ball of the rotating part close to the nozzle rolls on the sealing gasket.

[0010] Furthermore, two Hall detection elements are respectively arranged on two sides of the detection cylinder.

[0011] Furthermore, mounting grooves are provided on both sides of the detection cylinder, and the Hall detection elements are installed in the mounting grooves.

[0012] Furthermore, a thread is arranged on the outer side of the detection tube, and the end cover is screwed onto the detection tube through the thread.

[0013] The present invention also provides a hydraulic pressure detection method for a medical water flosser, using the hydraulic pressure detection device for a medical water flosser as described above, the steps comprising: When flushing teeth, the water flow is pressurized and sent into the operating handle, and then into the detection cylinder. After that, the water flow passes through the first through holes of the two rotating parts, and then enters the nozzle through the second through holes and is sprayed out; When water flows through the first through hole of the rotating part, the water flow will drive the rotating part to rotate under the influence of the guide groove. The two Hall detection elements continuously record the current values ​​they detect and calculate the outlet water pressure P through the conversion model. If the difference between the outlet water pressure P and the set water flow pressure entering the operating handle exceeds the set range, the water flow pressurization value is adjusted.

[0014] Furthermore, the specific calculation method of the conversion model is: Set the reset time T0, and recalculate the outlet water pressure P every time T0 passes; In each calculation, the detection value of the Hall detection element far from the nozzle is recorded as Ia, and the detection value of the Hall detection element close to the nozzle is recorded as Ib; Starting from time T=0, continuously draw the function graph of Ia with respect to time T and the function graph of Ib with respect to time T, and calculate the average periods of the two function graphs as Ta and Tb respectively; Calculate the outlet water pressure P = A·Ta 3 / 2 +B·[(Ta-Tb) / Tb] 1 / 2 ; Among them, A and B are conversion coefficients and are constants.

[0015] Furthermore, if the difference between the outlet water pressure P and the water flow pressure set to enter the operating handle exceeds the set range, the difference fraction C=(P-P0) / P0 is calculated, and the water flow pressurization value is adjusted according to the value of C.

[0016] The technical solution of the present invention can achieve the following technical effects: Compared with the traditional detection device, this test device significantly simplifies the detection structure, making the overall size of the device smaller, and can better meet the detection and use requirements on the operating handle. At the same time, the number of components in the detection device is small, and the installation complexity is low, which can better save the cost of processing and maintenance. In addition, the detection device has a clear boundary between the inside and outside, and does not need to set up an additional water flow branch for detection, which can effectively ensure the overall sealing of the water flosser. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a traditional Chinese medicine water flosser in the background technology; Figure 2 It is a cross-sectional view of the hydraulic detection device for the medical water flosser of the present invention; Figure 3 For the present invention Figure 2 A magnified image of point A; Figure 4 It is a component disassembly diagram of the hydraulic detection device for the medical water flosser in the present invention; Figure 5 It is a structural schematic diagram of the rotating part in the present invention; Figure numerals: 1. operating handle; 11. detection cylinder; 12. mounting groove; 2. rotating member; 21. first through hole; 22. guide groove; 23. metal member; 24. ball bearing; 3. Hall detection element; 4. end cover; 5. nozzle; 6. sealing gasket. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The present invention relates to a hydraulic pressure detection device for a medical water flosser. The detection device is mainly arranged on one end of an operating handle 1 close to a nozzle 5. Figures 2~5 As shown, it specifically includes two rotating parts 2, two Hall detection elements 3 and an end cover 4. The specific structure and arrangement of each component are as follows: The operating handle 1 is used to receive the water flow after being pressurized by the water pump, and is held by a person for operation; there are switch buttons and a switch system on the operating handle 1. When the button is turned on, the water flow will enter the operating handle 1. These structures are common existing technologies for the operating handle 1 and will not be described here. In addition to the above structure, a detection cylinder 11 is also provided at the end of the operating handle 1 close to the nozzle. The detection cylinder 11 is connected to the pipeline in the operating handle 1, so that the water flow received by the operating handle 1 will flow out from the detection cylinder 11.

[0023] Two rotating members 2 are placed in the detection cylinder 11 and are distributed along the axial direction of the detection cylinder 11, and the axis of each rotating member 2 is coaxial with the axis of the detection cylinder 11. Each rotating member 2 is only placed in the detection cylinder 11 and is not connected to the detection cylinder 11, so that each rotating member 2 can rotate and move freely in the detection cylinder 11. A first through hole 21 is opened at the center of each rotating member 2, and a guide groove 22 is set on the side wall of the first through hole 21, such as Figure 5 As shown, the guide groove 22 forms an angle with the axis of the detection barrel 11; a metal piece 23 is also provided on the outer wall of each rotating member 2, so that the metal piece 23 can move circumferentially along the inner wall of the detection barrel 11 following the rotation of the rotating member 2. The two rotating members 2 have the same structure and installation orientation, so there is no need to deliberately distinguish the front and back relationship during installation.

[0024] Two Hall detection elements 3 are fixedly arranged on the outside of the detection tube 11 and correspond to the outer side walls of the two rotating parts 2 respectively, and are used to detect the position of the metal part 23, thereby reflecting the rotation state of the rotating part 2. The Hall detection element is a detection element that can detect the position of metal. When the distance between the metal and the Hall detection element changes, the current emitted by the Hall detection element will produce a corresponding change in size. Its principle and structure are prior art and will not be elaborated here.

[0025] The end cover 4 is mounted on the detection tube 11 and is used to block the opening of the detection tube 11 ; a second through hole for water to flow through is arranged at the center of the end cover 4 .

[0026] The nozzle 5 is disposed on the end cover 4 and communicated with the second through hole.

[0027] The specific working process and principle of the detection device are as follows: when flushing teeth, the person presses the switch button of the operating handle 1, and the water pump in the main body of the water flosser starts to work to pressurize the water and send it into the operating handle 1, and then the water will enter the detection cylinder 11, and then pass through the first through hole 21 of the two rotating parts 2, and then enter the nozzle 5 through the second through hole to be sprayed out. When the water flows through the first through hole 21 of the rotating part 2, since the inner wall of the first through hole 21 has an obliquely arranged guide groove 22, the water flow impacts the side wall of the guide groove 22, which will push the rotating part 2 to rotate, and the greater the water pressure, the faster the water flow rate, the stronger the impact on the guide groove 22, and then can drive the rotating part 2 to rotate faster. In this way, the device converts water pressure into rotation of the rotating part 2. Therefore, the water pressure can be obtained by only detecting the rotation state of the rotating part 2. To this end, the device adopts a method of cooperating between a metal part 23 and a Hall detection element 3. As the rotating part 2 rotates, the metal part 23 will continuously approach and move away from the Hall detection element 3. The detection data obtained by the Hall detection element 3 will be a function with periodic characteristics. The rotation state of the rotating part 2 can be obtained by simply analyzing the data.

[0028] When the water pressure exceeds a certain limit, the rotation speed of the rotating member 2 will gradually tend to a fixed value. Therefore, the water pressure range that can be detected by a single rotating member 2 is limited. In order to expand the detection range, the device adopts a method of two rotating members 2 cooperating with each other: if the two rotating members 2 are recorded as the front rotating member and the rear rotating member in turn according to the flow direction of the water flow, then when the water pressure is high, the front rotating member will be hit the most by the water flow, and the water flow will carry the front rotating member to press the rear rotating member to make the rear rotating member against the end cover 4. At this time, the front rotating member will rotate faster under the impact of the water flow, and the rear rotating member will have friction at both ends and the impact force of the water flow passing through it has been absorbed by the front rotating member. Most of it will cause its rotation speed to be significantly different from that of the front rotating member; when the water pressure is low, the impact force on the guide groove 22 in the two rotating members 2 will be similar, and the driving effect of the water flow on the front rotating member is not obvious, so the rotation speeds of the two rotating members 2 will be closer. In this way, the test device can have an additional data dimension to judge the size of the water pressure, thereby improving the detection capability and accuracy.

[0029] Traditional devices for detecting water pressure usually require the installation of a probe or the introduction of water into the detection element to achieve detection. Compared with traditional detection devices, this test device significantly simplifies the detection structure, making the overall size of the device smaller and better adapting to the detection and use requirements on the operating handle 1. At the same time, the number of components in this detection device is small and the installation complexity is low, which can better save processing and maintenance costs. In addition, the detection device has clear internal and external boundaries, and does not need to set up additional water flow branches for detection, which can effectively ensure the overall sealing of the water flosser.

[0030] Under the premise of ensuring the free rotation and movement of the rotating part 2, in order to avoid the skewing of the rotating part 2 and causing its axis to be misaligned with the axis of the detection cylinder 11, the present detection device also optimizes the rotating part 2 as follows: the outer wall of each rotating part 2 is clearance-matched with the inner wall of the detection cylinder 11 to avoid the friction between the rotating part 2 and the detection cylinder 11 affecting the rotation of the rotating part 2; a plurality of metal parts 23 are arranged on each rotating part 2, and are evenly distributed along the circumference of the rotating part 2. All metal parts 23 are spherical structures and abut against the detection cylinder 11 to form effective circumferential support for the rotating part 2, thereby avoiding the skewing of the rotating part 2 to a limited extent.

[0031] The rotating parts 2 can achieve a better separation effect by using self-lubricating materials such as POM plastic, so that the two rotating parts 2 can rotate independently. If you want to obtain a better separation effect, you can also make the following optimization: a plurality of balls 24 are set on the end face of each rotating part 2 facing the nozzle 5, and the plurality of balls 24 are evenly distributed along the circumference of the rotating part 2. After the installation is completed, the balls 24 of one rotating part 2 will press against the end face of the other rotating part 2, and the balls 24 of the other rotating part 2 will press against the end cover 4.

[0032] Preferably, the detection device also includes a sealing gasket 6, which is arranged between the detection tube 11 and the end cover 4, and the ball 24 of the rotating part 2 close to the nozzle 5 rolls on the sealing gasket 6. The sealing gasket 6 can not only realize the sealing at the abutment between the detection tube 11 and the end cover 4, but also when the water pressure is large and the front rotating part presses against the rear rotating part, the greater the pressure, the deeper the ball 24 sinks into the sealing gasket 6, resulting in increased friction, thereby being able to more suppress the rotation of the rear rotating part, making the speed difference between the two rotating parts 2 more obvious, which is convenient for subsequent detection and judgment. The outer edge of the sealing gasket 6 can also be provided with an extension section extending in the direction of the detection tube 11. After the sealing gasket 6 is installed, the extension section wraps the outer side surface of the detection tube 11, thereby facilitating the installation and positioning of the sealing gasket 6.

[0033] The ball bearings 24 may be of a plastic structure or a metal structure. When the ball bearings 24 are of a metal structure, it is preferred that the number of ball bearings 24 on each rotating member 2 is equal to the number of metal members 23, and each ball bearing 24 is aligned with a corresponding metal member 23 in the radial direction of the rotating member 2, so that when the metal member 23 approaches the Hall detection element 3, the ball bearings 24 will also approach the Hall detection element 3, thereby enhancing the effect of the Hall detection element 3 and making the detection data of the Hall detection element 3 change more obviously.

[0034] Preferably, the two Hall detection elements 3 are respectively arranged on the two sides of the detection tube 11 , so that the two Hall detection elements 3 will not interfere with each other during detection, thereby improving the accuracy of the detection data.

[0035] In order to ensure the accurate installation position of the Hall detection element 3, it is preferred to provide installation grooves 12 on both sides of the detection tube 11, and the Hall detection element 3 is installed in the installation grooves 12. If necessary, a wiring groove extending along the axial direction of the detection tube 11 can be opened first for the placement of subsequent data lines, and then the installation groove 12 is processed in the wiring groove to place the Hall detection element 3.

[0036] In order to facilitate the installation of the end cover 4 , preferably a thread is provided on the outer side of the detection tube 11 , and the end cover 4 is screwed onto the detection tube 11 through the thread.

[0037] The present invention also relates to a hydraulic pressure detection method for a medical water flosser, using the above-mentioned hydraulic pressure detection device for a medical water flosser, the steps comprising: When flushing teeth, the water flow is pressurized and sent into the operating handle 1, and then enters the detection cylinder 11, and then the water flow passes through the first through hole 21 of the two rotating parts 2, and then enters the nozzle 5 through the second through hole and is sprayed out; When water flows through the first through hole 21 of the rotating part 2, the water flow will drive the rotating part 2 to rotate under the influence of the guide groove 22. The two Hall detection elements 3 continue to record the current values ​​they detect and calculate the outlet water pressure P through the conversion model. If the difference between the outlet water pressure P and the water flow pressure set to enter the operating handle 1 exceeds the set range, the water flow pressurization value is adjusted.

[0038] Preferably, the specific calculation method of the conversion model is: Set the reset time T0, and recalculate the outlet water pressure P every time T0 passes; In each calculation, the detection value of the Hall detection element far from the nozzle 5 is recorded as Ia, and the detection value of the Hall detection element close to the nozzle 5 is recorded as Ib; Each calculation starts from time T=0, and the function graphs of Ia and Ib with respect to time T are continuously plotted. Since the rotating member 2 drives the metal member 23 to continuously approach and move away from the Hall detection element 3, Ia and Ib will present an image with a shape similar to the sine function graph and periodic function characteristics. At this time, multiple period values ​​of Ia and Ib can be calculated, and their average values ​​are taken as the effective values ​​during this period. The average periods of the two function images are Ta and Tb, respectively, in ms. This period is the time taken for two adjacent metal members 23 on the rotating member 2 to reach the Hall detection element 3, which can reflect the rotation speed of the rotating member 2. Calculate the outlet water pressure P = A·Ta 3 / 2 +B·[(Ta-Tb) / Tb] 1 / 2 ; Among them, A and B are conversion coefficients and are constants. This formula takes the rotation speed of a rotating part 2 (i.e., Ta) and the rotation difference of two rotating parts 2 (i.e., (Ta-Tb) / Tb) as variables to form a fitting equation, comprehensively evaluate the rotation conditions of the two rotating parts 2, and thus realize the conversion calculation of the outlet water pressure size P.

[0039] The specific calculation formula of the outlet water pressure P can be achieved by testing special parameters through experiments and then fitting the parameters to obtain a fitting function. The specific process is as follows: First, remove the operating handle 1 and the nozzle 5, then connect the hydraulic sensor to the end of the operating handle 1 for installing the nozzle, and connect the outlet pipe and return pipe of the circulating water flow system to the front and rear ends of the operating handle 1 respectively. The circulating water flow system can input water flow into the operating handle 1 through the outlet pipe, and the water flows out of the operating handle 1 and enters the return pipe and then returns to the circulating water flow system; Adjust the water pump pressure value in the circulating water system several times. Each time you adjust, record the hydraulic sensor reading Px, and then start from time T=0, continuously draw the function graph of Ia with respect to time T and the function graph of Ib with respect to time T, and calculate the average periods of the two function graphs as Ta and Tb respectively. After multiple adjustments, you can get multiple sets of Px, Ta and Tb values. At this time, you can use Px as the dependent variable, Ta and (Ta-Tb) / Tb as independent variables, and fit the function Px=f(Ta,(Ta-Tb) / Tb) (the fitting result given in this device is A·Ta 3 / 2 +B·[(Ta-Tb) / Tb] 1 / 2 ), this formula can be regarded as an equivalent calculation formula for the outlet water pressure P.

[0040] In addition to calculating the outlet water pressure P by the fitting function as mentioned above, a reference library can also be established to obtain its value. Specifically, all Px values ​​and the corresponding Ta and (Ta-Tb) / Tb values ​​are stored in the reference library. In the subsequent work process, the corresponding outlet water pressure P value can be found by querying the reference library.

[0041] If the difference between the outlet water pressure P and the set water flow pressure entering the operating handle (i.e. the water supply pressure set by the main engine water pump) exceeds the set range, the difference fraction C=(P-P0) / P0 is calculated. C can reflect the deviation between the outlet water pressure P and the set water pressure, which can provide a reference for adjusting the water flow pressurization value to avoid excessive adjustment resulting in a larger deviation in water pressure. The water flow pressurization value is adjusted according to the value of C.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydraulic detection device for a medical water flosser, characterized in that: include: An operating handle (1), used to receive water flow and for a person to hold and operate; A detection cylinder (11) is provided at one end of the operating handle (1), and the received water flow will flow outward from the detection cylinder (11); Two rotating members (2) are both placed in the detection cylinder (11) and distributed along the axial direction of the detection cylinder (11), and the axis of each rotating member (2) is coaxial with the axis of the detection cylinder (11); a first through hole (21) is provided at the center of each rotating member (2), and a guide groove (22) is provided on the side wall of the first through hole (21), and an angle is formed between the guide groove (22) and the axis of the detection cylinder (11); a metal member (23) is also provided on the outer side wall of each rotating member (2); Two Hall detection elements (3) are both fixedly arranged on the outside of the detection cylinder (11) and correspond to the outer side walls of the two rotating members (2) respectively; An end cover (4) is mounted on the detection cylinder (11) and is used to seal the detection cylinder (11); a second through hole is provided at the center of the end cover (4); A nozzle (5) is arranged on the end cover (4) and is connected to the second through hole.

2. The hydraulic pressure detection device for a medical water flosser according to claim 1, characterized in that: The outer wall of each rotating member (2) is loosely matched with the inner wall of the detection cylinder (11); a plurality of metal members (23) are provided on each rotating member (2) and are evenly distributed along the circumference of the rotating member (2); all the metal members (23) are spherical structures and abut against the detection cylinder (11).

3. The hydraulic pressure detection device for a medical water flosser according to claim 1, characterized in that: A plurality of balls (24) are arranged on the end surface of each rotating member (2) facing the nozzle (5), and the plurality of balls (24) are evenly distributed along the circumference of the rotating member (2).

4. The hydraulic pressure detection device for a medical water flosser according to claim 3, characterized in that: It also comprises a sealing gasket (6) which is arranged between the detection cylinder (11) and the end cover (4), and the ball (24) of the rotating member (2) close to the nozzle (5) rolls on the sealing gasket (6).

5. The hydraulic pressure detection device for a medical water flosser according to claim 1, characterized in that: The two Hall detection elements (3) are respectively arranged on two sides of the detection cylinder (11).

6. The hydraulic pressure detection device for a medical water flosser according to claim 5, characterized in that: Mounting grooves (12) are provided on both sides of the detection cylinder (11), and the Hall detection element (3) is mounted in the mounting grooves (12).

7. The hydraulic pressure detection device for a medical water flosser according to claim 1, characterized in that: The outer side of the detection tube (11) is provided with threads, and the end cover (4) is screwed onto the detection tube (11) via the threads.

8. A hydraulic pressure detection method for a medical water flosser, characterized in that: Using the hydraulic detection device for a medical water flosser as claimed in any one of claims 1 to 7, the steps include: When flushing teeth, the water flow is pressurized and sent into the operating handle (1), and then enters the detection cylinder (11). Thereafter, the water flow passes through the first through hole (21) of the two rotating parts (2), and then enters the nozzle (5) through the second through hole and is sprayed out; When water flows through the first through hole (21) of the rotating member (2), the water flow drives the rotating member (2) to rotate under the influence of the guide groove (22). The two Hall detection elements (3) continuously record the current values ​​detected by them and calculate the outlet water pressure magnitude P through the conversion model. If the difference between the outlet water pressure magnitude P and the water flow pressure set to enter the operating handle (1) exceeds the set range, the water flow pressurization value is adjusted.

9. The hydraulic pressure detection device for a medical water flosser according to claim 8, characterized in that: The specific calculation method of the conversion model is: Set the reset time T0, and recalculate the outlet water pressure P every time T0 passes; In each calculation, the detection value of the Hall detection element (3) far from the nozzle (5) is recorded as Ia, and the detection value of the Hall detection element (3) close to the nozzle (5) is recorded as Ib; Starting from time T=0, continuously draw the function graph of Ia with respect to time T and the function graph of Ib with respect to time T, and calculate the average periods of the two function graphs as Ta and Tb respectively; Calculate the outlet water pressure P = A·Ta 3 / 2 +B·[(Ta-Tb) / Tb] 1 / 2 ; Among them, A and B are conversion coefficients and are constants.

10. The hydraulic pressure detection device for a medical water flosser according to claim 9, characterized in that: If the difference between the outlet water pressure P and the set water flow pressure entering the operating handle exceeds the set range, the difference fraction C=(P-P0) / P0 is calculated, and the water flow pressurization value is adjusted according to the value of C.

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