Water pick

Abstract

The utility model discloses an oral irrigator, which comprises a nozzle, a water outlet, a water inlet and a water outlet, the water tank is communicated with the liquid spraying opening through a liquid conveying flow path, and the liquid conveying flow path comprises a liquid inlet flow path and a liquid outlet flow path; the first pump body is arranged on the liquid conveying flow path and pumps water liquid in the water tank to the liquid spraying opening, the liquid inlet flow path is located on the upstream of the first pump body, and the liquid outlet flow path is located on the downstream of the first pump body; the functional liquid box is communicated with the infusion flow path through a medicine infusion flow path, and the medicine infusion flow path comprises a medicine inlet flow path and a medicine outlet flow path; the second pump body is arranged on the medicine conveying flow path and pumps the functional liquid in the functional liquid box to the liquid conveying flow path, the medicine inlet flow path is located on the upstream of the second pump body, and the medicine outlet flow path is located on the downstream of the second pump body; when the medicine outlet flow path is communicated with the liquid inlet flow path, the pressure of the medicine outlet flow path is greater than that of the liquid inlet flow path; and when the medicine outlet flow path is communicated with the liquid outlet flow path, the pressure of the medicine outlet flow path is greater than that of the liquid outlet flow path. The oral irrigator is good in oral cavity cleaning effect, and functional liquid can smoothly flow to the infusion flow path.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning equipment, and in particular to a water flosser. Background Art

[0002] Oral irrigators usually use water as the flushing medium, removing dental plaque on the tooth surface and food debris between the teeth through the impact force of water. However, simply using water as a medium to clean the oral cavity cannot kill bacteria in the oral cavity, remove bad breath, or keep the breath fresh.

[0003] Although some water flossers are provided with other boxes outside the water tank for storing liquids such as mouthwash to enable the water flossers to achieve more functions, the water pump is connected to the box through a pipe, and the driving force in the pipe is small, resulting in low efficiency in transporting the liquid in the box. Utility Model Content

[0004] The purpose of the present application is to provide a mouthpiece for an oral irrigator, which has a good cleaning effect on the oral cavity and the functional liquid can flow smoothly to the infusion channel.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides a water flosser, comprising: a nozzle, provided with a liquid spraying port; a water tank, connected to the liquid spraying port through an infusion flow path, the infusion flow path comprising an inlet flow path and an outlet flow path; a first pump body, provided in the infusion flow path, for pumping the water in the water tank to the liquid spraying port through the infusion flow path, the inlet flow path being located upstream of the first pump body, and the outlet flow path being located downstream of the first pump body; a functional liquid tank, connected to the infusion flow path through a drug delivery flow path, the drug delivery flow path comprising an inlet flow path and an outlet flow path; The second pump body is arranged in the drug delivery flow path, and is used for pumping the functional liquid in the functional liquid tank to the infusion flow path through the drug delivery flow path, the drug inlet flow path is located upstream of the second pump body, and the drug outlet flow path is located downstream of the second pump body, the drug inlet flow path is connected with the liquid inlet flow path, or the drug inlet flow path is connected with the liquid outlet flow path; wherein, when the drug outlet flow path is connected with the liquid inlet flow path, the pressure of the drug outlet flow path is greater than the pressure of the liquid inlet flow path; when the drug outlet flow path is connected with the liquid outlet flow path, the pressure of the drug outlet flow path is greater than the pressure of the liquid outlet flow path.

[0006] In some embodiments of the present application, the water flosser further includes: a liquid inlet one-way valve, arranged in the liquid inlet flow path, allowing the water in the water tank to flow toward the first pump body, and preventing the liquid in the first pump body from flowing toward the water tank; wherein, when the medicine outlet flow path is connected with the liquid inlet flow path, the connection point between the medicine outlet flow path and the liquid inlet flow path is located upstream of the liquid inlet one-way valve, and when the liquid inlet one-way valve is closed, the pressure in the medicine outlet flow path is lower than the pressure in the first pump body.

[0007] In some embodiments of the present application, the liquid outlet of the medicine outlet flow path and the liquid inlet one-way valve are staggered in the radial direction of the water flosser; and / or the liquid outlet of the medicine outlet flow path and the liquid inlet one-way valve are staggered in the length direction of the water flosser.

[0008] In some embodiments of the present application, the liquid inlet flow path includes a liquid storage section, and in the extension direction of the liquid inlet flow path, the liquid storage section is located between the liquid inlet of the liquid inlet flow path and the liquid outlet of the drug outlet flow path; when the liquid inlet one-way valve is closed, the flow rate of the functional liquid pumped by the second pump body is less than the volume of the liquid storage section.

[0009] In some embodiments of the present application, when the drug outlet flow path is connected to the liquid inlet flow path, the cross-sectional area of ​​the drug outlet flow path is smaller than the cross-sectional area of ​​the liquid inlet flow path; when the drug outlet flow path is connected to the liquid outlet flow path, the cross-sectional area of ​​the drug outlet flow path is smaller than the cross-sectional area of ​​the liquid outlet flow path.

[0010] In some embodiments of the present application, when the drug outlet flow path is connected to the liquid inlet flow path, the ratio of the cross-sectional area of ​​the drug outlet flow path to the cross-sectional area of ​​the liquid inlet flow path is not greater than 1 / 2 and not less than 1 / 9; when the drug outlet flow path is connected to the liquid outlet flow path, the ratio of the cross-sectional area of ​​the drug outlet flow path to the cross-sectional area of ​​the liquid outlet flow path is not greater than 1 / 2 and not less than 1 / 9.

[0011] In some embodiments of the present application, the water flosser also includes: a connecting connector, which has a first interface, a second interface and a third interface, the first interface, the second interface and the third interface are connected to each other, the first interface is connected to the liquid inlet of the first pump body, the second interface is connected to the liquid outlet of the second pump body, and the third interface is connected to the water tank.

[0012] In some embodiments of the present application, an area surrounded by an inner contour of a cross section of the second interface is smaller than an area surrounded by an inner contour of a cross section of the third interface.

[0013] In some embodiments of the present application, an area enclosed by an outer contour of a cross section of the second interface is smaller than an area enclosed by an outer contour of a cross section of the third interface.

[0014] In some embodiments of the present application, the oral irrigator further includes: a liquid inlet one-way valve, which is arranged on the connecting joint and / or the first pump body and is adjacent to the first interface; wherein, in the length direction of the oral irrigator, the third interface is closer to the water tank than the second interface.

[0015] In some embodiments of the present application, the connecting joint is provided with a thin flow path and a coarse flow path, the coarse flow path is connected to the first interface, and the thin flow path is connected to the second interface and the coarse flow path; wherein the cross-sectional area of ​​the coarse flow path is larger than the cross-sectional area of ​​the thin flow path.

[0016] In some embodiments of the present application, the coarse flow path includes: a first coarse section connected to the first interface; a second coarse section connected to the first coarse section and the thin flow path; wherein the cross-sectional area of ​​the first coarse section is greater than the cross-sectional area of ​​the second coarse section.

[0017] In some embodiments of the present application, an angle between a central axis of the thin flow path and a central axis of the thick flow path is greater than 0° and less than 180°.

[0018] In some embodiments of the present application, the first interface of the connecting joint is inserted into the liquid inlet of the first pump body.

[0019] In some embodiments of the present application, within the same time period, the ratio of the flow rate of the liquid pumped by the first pump body to the flow rate of the functional liquid pumped by the second pump body is not less than 10.

[0020] In some embodiments of the present application, the first pump body is a plunger pump or a diaphragm pump, and the second pump body is a peristaltic pump.

[0021] In some embodiments of the present application, the functional liquid tank is provided with an air inlet hole, and the air inlet hole is connected to the atmosphere.

[0022] In some embodiments of the present application, the water flosser further includes: a casing, at least a portion of the functional liquid tank is disposed in the casing, the air inlet hole is disposed in the portion of the functional liquid tank located in the casing, the casing is provided with an air inlet channel, and the air inlet hole is connected to the atmosphere through the air inlet channel.

[0023] In some embodiments of the present application, the water flosser further includes: a waterproof and breathable membrane, provided in the air inlet channel and / or the air inlet hole, allowing the functional liquid tank to exchange air with the atmosphere and preventing the liquid in the functional liquid tank from flowing out of the air inlet channel and / or the air inlet hole.

[0024] In the water flosser of the embodiment of the present application, the functional liquid and the water liquid are mixed in the infusion flow path to form a mixed liquid, which is sprayed out from the liquid spray port. It can not only remove the dental plaque on the tooth surface and the food residues between the teeth by the impact force, but also has additional functions to kill oral bacteria, remove bad breath, keep the breath fresh, and whiten teeth. In addition, no matter whether the medicine outlet flow path is connected to the liquid inlet flow path or the liquid outlet flow path, the pressure of the medicine outlet flow path is greater than the pressure of the infusion flow path it is connected to, and the functional liquid in the medicine outlet flow path will be driven into the infusion flow path under the action of the pressure difference. The functional liquid in the medicine outlet flow path is subjected to a greater pressure difference, which is conducive to the functional liquid flowing into the infusion flow path, thereby improving the delivery efficiency of the functional liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the oral irrigator according to an embodiment of the present application;

[0027] Figure 2 This is one of the cross-sectional views of the oral irrigator according to an embodiment of the present application;

[0028] Figure 3 This is the second cross-sectional view of the oral irrigator according to the embodiment of the present application;

[0029] Figure 4 This is the third cross-sectional view of the oral irrigator according to the embodiment of the present application;

[0030] Figure 5 This is one of the schematic diagrams of the layout of the oral irrigator according to the embodiment of the present application;

[0031] Figure 6 This is the second schematic diagram of the layout of the oral irrigator according to the embodiment of the present application;

[0032] Figure 7 A schematic diagram of the connection of the oral irrigator according to an embodiment of the present application;

[0033] Figure 8 This is one of the structural schematic diagrams of the functional liquid tank of the oral irrigator according to an embodiment of the present application;

[0034] Fig. 9 This is the second structural schematic diagram of the functional liquid tank of the oral irrigator according to the embodiment of the present application.

[0035] Description of Figure Numbers:

[0036] Water flosser 1.

[0037] Nozzle 100, liquid spraying port 110,

[0038] Water tank 200,

[0039] Infusion flow path 300, inlet flow path 310, liquid storage section 311, outlet flow path 320,

[0040] The first pump body 400, the liquid inlet check valve 410,

[0041] Functional liquid tank 500, air inlet 510,

[0042] Drug delivery channel 600, drug inlet channel 610, drug outlet channel 620,

[0043] The second pump body 700,

[0044] Connector 800, first interface 810, second interface 820, third interface 830, thin flow path 840, thick flow path 850, first thick section 851, second thick section 852,

[0045] Casing 900 , air inlet passage 910 , waterproof breathable membrane 920 , battery 930 , and electronic control board 940 .

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0048] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0049] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0051] The oral irrigator 1 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0052] like Figure 1 , Figure 5 and Figure 6 As described above, the oral irrigator 1 of the embodiment of the present application includes a nozzle 100, a water tank 200, a first pump body 400 and a functional liquid tank 500.

[0053] The nozzle 100 is provided with a liquid spraying port 110, and the water tank 200 is connected to the liquid spraying port 110 through the liquid infusion flow path 300, and the water tank 200 can be used to store water. The first pump body 400 is provided in the liquid infusion flow path 300, and the first pump body 400 is used to pump the water in the water tank 200 to the liquid spraying port 110 through the liquid infusion flow path 300.

[0054] The functional liquid tank 500 is connected to the infusion flow path 300 through the drug delivery flow path 600. The type of liquid in the functional liquid tank 500 is different from that in the water tank 200. For example, the functional liquid tank 500 can be used to store functional liquids with different functions such as mouthwash, cleaning liquid, and medicine. The liquid in the functional liquid tank 500 can achieve at least one of the functions of sterilization, deodorization, tartar removal, and teeth whitening. The second pump body 700 is arranged on the drug delivery flow path 600, and the second pump body 700 is used to pump the functional liquid in the functional liquid tank 500 to the infusion flow path 300 through the drug delivery flow path 600.

[0055] In this way, the functional liquid and the water liquid are mixed in the infusion flow path 300 to form a mixed liquid, which is sprayed out from the spray port 110. Not only can the dental plaque on the tooth surface and food residues between the teeth be removed by the impact force of the mixed liquid, but the mixed liquid also has additional functions, such as killing oral bacteria, removing bad breath, keeping breath fresh, and whitening teeth. Users can add functional liquids with different functions into the functional liquid tank 500 according to their needs.

[0056] Specifically, the infusion flow path 300 includes an inlet flow path 310 and an outlet flow path 320, wherein the inlet flow path 310 is located upstream of the first pump body 400, and the outlet flow path 320 is located downstream of the first pump body 400. The drug delivery flow path 600 includes an inlet flow path 610 and an outlet flow path 620. The inlet flow path 610 is located upstream of the second pump body 700, and the outlet flow path 620 is located downstream of the second pump body 700. The outlet flow path 620 is connected to the inlet flow path 310 or to the outlet flow path 320. When the outlet flow path 620 is connected to the inlet flow path 310, the pressure of the outlet flow path 620 is greater than the pressure of the inlet flow path 310; when the outlet flow path 620 is connected to the outlet flow path 320, the pressure of the outlet flow path 620 is greater than the pressure of the outlet flow path 320.

[0057] That is to say, no matter the drug outlet flow path 620 is connected to the liquid inlet flow path 310 or the liquid outlet flow path 320 , the functional liquid in the drug outlet flow path 620 will be driven into the infusion flow path 300 under the action of the pressure difference.

[0058] For example, the above pressure difference comes from at least two aspects:

[0059] On the one hand, when the first pump body 400 drives the liquid in the infusion flow path 300 to flow, the infusion flow path 300 is in a negative pressure state, resulting in a first pressure difference between the infusion flow path 300 and the drug outlet flow path 620;

[0060] Secondly, when the second pump body 700 is in operation, the functional fluid is continuously pumped to the drug outlet flow path 620 , and the pressure of the drug outlet flow path 620 increases, resulting in a second pressure difference between the infusion flow path 300 and the drug outlet flow path 620 .

[0061] It can be seen that when the drug outlet flow path 620 is connected to the inlet flow path 310, the sum of the first pressure difference and the second pressure difference is the difference between the pressure of the drug outlet flow path 620 and the pressure of the inlet flow path 310; when the drug outlet flow path 620 is connected to the outlet flow path 320, the sum of the first pressure difference and the second pressure difference is the difference between the pressure of the drug outlet flow path 620 and the pressure of the outlet flow path 320. In this way, the functional liquid in the drug outlet flow path 620 is subjected to a greater pressure difference, which is conducive to the functional liquid flowing into the infusion flow path 300, improves the delivery efficiency of the functional liquid, and can also effectively ensure that the mixing ratio of the functional liquid and the water liquid meets the expectations.

[0062] like Figure 2 , Figure 3 and Figure 7As shown, the above-mentioned oral irrigator 1 may include a battery 930 and an electric control board 940, and the first pump body 400 and the second pump body 700 may be connected to the same battery 930, reducing the number of batteries 930 and reducing the volume of the oral irrigator 1, or the first pump body 400 and the second pump body 700 may be connected to different batteries 930, and the endurance of the oral irrigator 1 is stronger. In addition, the first pump body 400 and the second pump body 700 may be connected to the same electric control board 940, reducing the number of electric control boards 940 and reducing the volume of the oral irrigator 1, or the first pump body 400 and the second pump body 700 may be connected to different electric control boards 940 to reduce the manufacturing and processing of each electric control board 940, and because the volume of each electric control board 940 is small, the flexibility of the layout can be improved.

[0063] like Figure 6 As shown, the above-mentioned water flosser 1 also includes a liquid inlet one-way valve 410, which is arranged in the liquid inlet flow path 310. The liquid inlet one-way valve 410 allows the water in the water tank 200 to flow to the first pump body 400, and prevents the liquid in the first pump body 400 from flowing to the water tank 200.

[0064] Specifically, when the first pump body 400 pumps water, the pressure in the first pump body 400 decreases, and in the extension direction of the liquid inlet check valve 410, the pressure upstream of the liquid inlet check valve 410 is greater than the pressure downstream of the liquid inlet check valve 410. Under the action of the pressure difference, the liquid in the water tank 200 flows into the first pump body 400 through the liquid inlet check valve 410.

[0065] When the first pump body 400 discharges water, the pressure in the first pump body 400 increases. In the extension direction of the liquid inlet one-way valve 410, the pressure upstream of the liquid inlet one-way valve 410 is made smaller than the pressure downstream of the liquid inlet one-way valve 410. Under the action of the pressure difference and the retaining force of the liquid inlet one-way valve 410 itself, the liquid inlet one-way valve 410 is closed. The liquid inlet one-way valve 410 prevents the liquid in the first pump body 400 from flowing back to the water tank 200, so as to ensure that the liquid in the first pump body 400 flows to the nozzle 100 and is sprayed out from the nozzle 100, thereby cleaning the oral cavity.

[0066] Among them, when the drug outlet flow path 620 is connected with the liquid inlet flow path 310, the connection point between the drug outlet flow path 620 and the liquid inlet flow path 310 is located upstream of the liquid inlet check valve 410. In this way, on the one hand, the distance between the liquid inlet check valve 410 and the first pump body 400 is small. For example, the liquid inlet check valve 410 can be installed to the liquid inlet of the first pump body 400. Not only is the installation of the liquid inlet check valve 410 convenient, but also when the first pump body 400 discharges water, the liquid in the first pump body 400 can flow to the nozzle 100 more thoroughly. On the other hand, when the first pump body 400 discharges water, the liquid in the first pump body 400 can prevent the liquid in the first pump body 400 from flowing to the drug outlet flow path 620, thereby preventing the liquid in the liquid inlet flow path 310 from flowing back to the drug outlet flow path 620.

[0067] In addition, when the liquid inlet check valve 410 is closed, that is, when the first pump body 400 discharges water, the pressure of the medicine outlet flow path 620 is lower than the pressure in the first pump body 400, thereby ensuring that the pressure upstream of the liquid inlet check valve 410 is lower than the pressure downstream of the liquid inlet check valve 410, so as to prevent the liquid inlet check valve 410 from being opened by mistake, and to ensure that the liquid in the first pump body 400 will not flow toward the water tank 200 when the first pump body 400 discharges water, so as to maintain the normal operation of the oral irrigator 1.

[0068] For example, when the first pump body 400 is discharging water, the second pump body 700 can stop running or reduce the operating power to reduce the pressure of the medicine outlet flow path 620; when the first pump body 400 is pumping water, the second pump body 700 runs or runs at normal power to ensure that the pressure of the medicine outlet flow path 620 is greater than the pressure of the liquid inlet flow path 310.

[0069] Of course, it is understandable that in some embodiments of the present application, when the drug outlet flow path 620 is connected to the liquid inlet flow path 310, the connection point between the drug outlet flow path 620 and the liquid inlet flow path 310 can be located downstream of the liquid inlet check valve 410 to shorten the flow path of the functional fluid. At this time, the liquid outlet of the drug outlet flow path 620 and the liquid inlet of the first pump body 400 are staggered, that is, the liquid outlet of the drug outlet flow path 620 and the liquid inlet of the first pump body 400 are staggered in the radial direction of the water flosser 1, or the liquid outlet of the drug outlet flow path 620 and the liquid inlet of the first pump body 400 are staggered in the axial direction of the water flosser 1, so that the liquid outlet of the drug outlet flow path 620 is not facing the liquid inlet of the first pump body 400, preventing the liquid outlet of the drug outlet flow path 620 from directly spraying the functional liquid to the liquid inlet of the first pump body 400, reducing the impact force on the liquid inlet of the first pump body 400, and ensuring the normal operation of the first pump body 400.

[0070] like Figure 6As shown, the liquid outlet of the medicine outlet flow path 620 and the liquid inlet one-way valve 410 are staggered in the radial direction of the oral irrigator 1, or the liquid outlet of the medicine outlet flow path 620 and the liquid inlet one-way valve 410 are staggered in the length direction of the oral irrigator 1, or the liquid outlet of the medicine outlet flow path 620 and the liquid inlet one-way valve 410 are staggered in the radial direction of the oral irrigator 1, and the liquid outlet of the medicine outlet flow path 620 and the liquid inlet one-way valve 410 are staggered in the length direction of the oral irrigator 1.

[0071] That is to say, the liquid outlet of the drug outlet flow path 620 is not facing the liquid inlet check valve 410, which prevents the functional liquid sprayed from the drug outlet flow path 620 from directly hitting the liquid inlet check valve 410, reduces the impact force on the liquid inlet check valve 410, reduces the probability of damage to the liquid inlet check valve 410, and extends the service life of the liquid inlet check valve 410.

[0072] In addition, the functional liquid may have a certain viscosity. When the functional liquid is not mixed with the aqueous solution, the viscosity of the functional liquid is relatively high. Therefore, if the functional liquid sprayed from the drug outlet flow path 620 directly hits the liquid inlet check valve 410, it will cause the viscosity between the various parts of the liquid inlet check valve 410 to increase, which is not conducive to the liquid inlet check valve 410 changing its own shape, affecting the opening and closing of the liquid inlet check valve 410, and further affecting the normal operation of the first pump body 400.

[0073] Therefore, by making the liquid outlet of the drug outlet flow path 620 not face the liquid inlet one-way valve 410, the functional liquid sprayed out of the drug outlet flow path 620 is first mixed with the water liquid in the liquid inlet flow path 310, and then passes through the liquid inlet one-way valve 410. The concentration of the functional liquid in the mixed liquid is reduced, and the viscosity of the mixed liquid is reduced, thereby preventing the functional liquid from being too viscous and affecting the switching of the liquid inlet one-way valve 410, thereby ensuring the normal operation of the liquid inlet one-way valve 410.

[0074] like Figure 6 As shown, the above-mentioned liquid inlet flow path 310 includes a liquid storage section 311 (attached Figure 6 In the figure, the dotted line defines the upper end of the liquid storage section 311, and the lower end of the liquid storage section 311 is the end where the liquid inlet flow path 310 is connected to the water tank 200). In the extension direction of the liquid inlet flow path 310, the liquid storage section 311 is located between the liquid inlet of the liquid inlet flow path 310 and the liquid outlet of the drug outlet flow path 620. When the liquid inlet check valve 410 is closed, the flow rate of the functional liquid pumped by the second pump body 700 is less than the volume of the liquid storage section 311. When the liquid inlet check valve 410 is closed, the second pump body 700 can stop working or work at a reduced power to reduce the total flow rate of the functional liquid pumped by the second pump body 700.

[0075] That is to say, from the closing of the liquid inlet check valve 410 to the opening of the liquid inlet check valve 410 (i.e., the total duration of a single closing of the liquid inlet check valve 410), the total flow rate of the functional liquid pumped by the second pump body 700 is less than the capacity of the liquid storage section 311. During the period when the liquid inlet check valve 410 is closed, the functional liquid pumped by the second pump body 700 flows to the water tank 200, and the functional liquid pumped by the second pump body 700 flows into the liquid storage section 311. Since the total flow rate of the functional liquid pumped by the second pump body 700 is less than the capacity of the liquid storage section 311 during the period when the liquid inlet check valve 410 is closed, the functional liquid pumped by the second pump body 700 can be stored in the liquid storage section 311, thereby preventing the functional liquid pumped by the second pump body 700 from flowing into the water tank 200, thereby preventing the functional liquid from being diluted, ensuring the effect of the functional liquid, and ensuring the purity of the water in the water tank 200.

[0076] like Figure 4-Figure 6 As shown, when the above-mentioned drug outlet flow path 620 is connected to the liquid inlet flow path 310, the cross-sectional area of ​​the drug outlet flow path 620 is smaller than the cross-sectional area of ​​the liquid inlet flow path 310. In this way, the pressure exerted on the functional liquid in the drug outlet flow path 620 is greater than the pressure exerted on the liquid in the liquid inlet flow path 310. Under the action of the pressure difference, the functional liquid in the drug outlet flow path 620 can flow into the liquid inlet flow path 310 more smoothly.

[0077] Specifically, when the drug outlet flow path 620 is connected to the liquid inlet flow path 310, the ratio of the cross-sectional area of ​​the drug outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 is not greater than 1 / 2 and not less than 1 / 9. The ratio of the cross-sectional area of ​​the drug outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 may be 1 / 9, 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, 1 / 3 or 1 / 2.

[0078] When the ratio of the cross-sectional area of ​​the drug outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 is greater than 1 / 2, the cross-sectional area of ​​the drug outlet flow path 620 is relatively close to the cross-sectional area of ​​the liquid inlet flow path 310, resulting in the pressure of the functional liquid in the drug outlet flow path 620 being relatively close to the pressure of the liquid in the liquid inlet flow path 310. In other words, the difference between the pressure of the functional liquid in the drug outlet flow path 620 and the pressure of the liquid in the liquid inlet flow path 310 is small, and the functional liquid in the drug outlet flow path 620 flows slowly, which affects the mixing ratio of the functional liquid and the liquid in the water tank 200 in the liquid inlet flow path 310;

[0079] When the ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 is less than 1 / 9, the cross-sectional area of ​​the medicine outlet flow path 620 is greatly different from the cross-sectional area of ​​the liquid inlet flow path 310, which will cause the cross-sectional area of ​​the liquid inlet flow path 310 to be too large or too small. If the cross-sectional area of ​​the liquid inlet flow path 310 is too large, the volume of the oral irrigator 1 will also increase, affecting the gripping experience of the oral irrigator 1. If the cross-sectional area of ​​the medicine outlet flow path 620 is too small, the flow resistance of the medicine outlet flow path 620 is large, and the flow rate of the functional liquid from the medicine outlet flow path 620 to the liquid inlet flow path 310 in the same time is too small, which also affects the mixing ratio of the functional liquid and the liquid in the water tank 200 in the liquid inlet flow path 310.

[0080] The ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 is not greater than 1 / 2 and not less than 1 / 9. On the one hand, the ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 will not be too small, so that the difference between the pressure on the functional liquid in the medicine outlet flow path 620 and the pressure on the liquid in the liquid inlet flow path 310 can be obvious, thereby ensuring that the functional liquid in the medicine outlet flow path 620 flows smoothly. On the other hand, the ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid inlet flow path 310 will not be too large, thereby ensuring that the cross-sectional area of ​​the liquid inlet flow path 310 and the cross-sectional area of ​​the medicine outlet flow path 620 are reasonably set, which is conducive to the miniaturization of the oral irrigator 1 and the small flow resistance of the medicine outlet flow path 620.

[0081] like Figure 4-Figure 6 As shown, when the above-mentioned drug outlet flow path 620 is connected to the liquid outlet flow path 320, the cross-sectional area of ​​the drug outlet flow path 620 is smaller than the cross-sectional area of ​​the liquid outlet flow path 320. In this way, the pressure exerted on the functional liquid in the drug outlet flow path 620 is greater than the pressure exerted on the liquid in the liquid outlet flow path 320. Under the action of the pressure difference, the functional liquid in the drug outlet flow path 620 can flow into the liquid outlet flow path 320 more smoothly.

[0082] When the drug outlet flow path 620 is connected to the liquid outlet flow path 320, the ratio of the cross-sectional area of ​​the drug outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 is not greater than 1 / 2 and not less than 1 / 9. The ratio of the cross-sectional area of ​​the drug outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 may be 1 / 9, 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, 1 / 3 or 1 / 2.

[0083] When the ratio of the cross-sectional area of ​​the drug outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 is greater than 1 / 2, the cross-sectional area of ​​the drug outlet flow path 620 is relatively close to the cross-sectional area of ​​the liquid outlet flow path 320, resulting in the pressure of the functional liquid in the drug outlet flow path 620 being relatively close to the pressure of the liquid in the liquid outlet flow path 320. In other words, the difference between the pressure of the functional liquid in the drug outlet flow path 620 and the pressure of the liquid in the liquid outlet flow path 320 is small, and the functional liquid in the drug outlet flow path 620 flows slowly, which affects the mixing ratio of the functional liquid and the liquid in the water tank 200 in the liquid inlet flow path 310;

[0084] When the ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 is less than 1 / 9, the cross-sectional area of ​​the medicine outlet flow path 620 is greatly different from the cross-sectional area of ​​the liquid outlet flow path 320, which will cause the cross-sectional area of ​​the liquid outlet flow path 320 to be too large or too small. If the cross-sectional area of ​​the liquid outlet flow path 320 is too large, the volume of the oral irrigator 1 will also increase, affecting the gripping experience of the oral irrigator 1. If the cross-sectional area of ​​the medicine outlet flow path 620 is too small, the flow resistance of the medicine outlet flow path 620 is large, and the flow rate of the functional liquid flowing from the medicine outlet flow path 620 to the liquid outlet flow path 320 in the same time is too small, which also affects the mixing ratio of the functional liquid and the liquid in the water tank 200 in the liquid outlet flow path 320.

[0085] The ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 is not greater than 1 / 2 and not less than 1 / 9. On the one hand, the ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 will not be too small, so that the difference between the pressure exerted on the functional liquid in the medicine outlet flow path 620 and the pressure exerted on the liquid in the liquid outlet flow path 320 can be obvious, thereby ensuring that the liquid in the medicine outlet flow path 620 flows smoothly. On the other hand, the ratio of the cross-sectional area of ​​the medicine outlet flow path 620 to the cross-sectional area of ​​the liquid outlet flow path 320 will not be too large, thereby ensuring that the cross-sectional area of ​​the liquid outlet flow path 320 and the cross-sectional area of ​​the medicine outlet flow path 620 are reasonably set, which is conducive to the miniaturized setting of the oral irrigator 1 and the small flow resistance of the medicine outlet flow path 620.

[0086] like Figure 4 and Figure 7 As shown, the above-mentioned water flosser 1 also includes a connecting joint 800, which is provided with a first interface 810, a second interface 820 and a third interface 830. The first interface 810, the second interface 820 and the third interface 830 are connected to each other, the first interface 810 is connected to the liquid inlet of the first pump body 400, the second interface 820 is connected to the liquid outlet of the second pump body 700, and the third interface 830 is connected to the water tank 200. The connecting joint 800 can be a three-way pipe, a four-way pipe, etc.

[0087] By setting the connecting joint 800, the water tank 200, the first pump body 400 and the second pump body 700 can be connected to each other, which is beneficial to ensuring the connection reliability between the drug outlet flow path 620 and the liquid inlet flow path 310, and the functional liquid flows more smoothly at the connection between the drug outlet flow path 620 and the liquid inlet flow path 310.

[0088] It should be noted that, in some embodiments of the present application, when the drug outlet flow path 620 and the liquid outlet flow path 320 are connected, the liquid outlet of the first pump body 400 can be connected to the first interface 810 of the connecting connector 800, the liquid outlet of the second pump body 700 is connected to the second interface 820 of the connecting connector 800, and the nozzle 100 is connected to the third interface 830 of the connecting connector 800.

[0089] like Figure 4 As shown, the area surrounded by the inner contour of the cross section of the second interface 820 is smaller than the area surrounded by the inner contour of the cross section of the third interface 830. The second interface 820 defines a portion of the liquid inlet flow path 310, and the third interface 830 defines a portion of the drug outlet flow path 620. This arrangement can ensure that the cross-sectional area of ​​at least a portion of the liquid inlet flow path 310 is smaller than the cross-sectional area of ​​the drug outlet flow path 620, so that the pressure on the functional liquid in the drug outlet flow path 620 is greater than the pressure on the liquid in the liquid inlet flow path 310. Under the action of the pressure difference, the liquid in the drug outlet flow path 620 can flow into the liquid outlet flow path 320 more smoothly.

[0090] like Figure 4 As shown, the area surrounded by the cross-sectional outer contour of the second interface 820 is smaller than the area surrounded by the cross-sectional outer contour of the third interface 830. In this way, on the one hand, the wall thickness of the second interface 820 and the wall thickness of the third interface 830 can be ensured to be closer to each other, thereby ensuring the structural strength of the connection joint 800. On the other hand, the second interface 820 and the third interface 830 have a large difference in appearance, which can play a fool-proof role, facilitate assembly, and avoid incorrect assembly.

[0091] like Figure 7 As shown, the above-mentioned water flosser 1 further includes a liquid inlet check valve 410, which is arranged on the connecting joint 800, or the liquid inlet check valve 410 is arranged on the first pump body 400. The liquid inlet check valve 410 is adjacent to the first interface 810. In the length direction of the water flosser 1, the third interface 830 is closer to the water tank 200 than the second interface 820.

[0092] When the liquid inlet one-way valve 410 is closed, that is, when the first pump body 400 discharges water, the second pump body 700 can continue to work, and the functional liquid continues to flow from the drug outlet flow path 620 to the second interface 820. Since the liquid inlet one-way valve 410 is closed, the flow resistance of the functional liquid from the second interface 820 to the first interface 810 is much greater than the flow resistance of the functional liquid from the second interface 820 to the third interface 830. Therefore, the functional liquid flows from the second interface 820 to the third interface 830, and the liquid in the liquid inlet flow path 310 is squeezed and flows toward the water tank 200.

[0093] Furthermore, generally speaking, when the oral irrigator 1 is in use, the height of the nozzle 100 is higher than the height of the water tank 200. By setting the third interface 830 closer to the water tank 200 relative to the second interface 820 in the length direction of the oral irrigator 1, that is, the height of the third interface 830 is lower than the height of the second interface 820, and the third interface 830 is located below the second interface 820, when the liquid inlet one-way valve 410 is closed, the functional liquid of the second interface 820 naturally flows toward the direction of the third interface 830 under the action of gravity, thereby effectively preventing the functional liquid from flowing toward the liquid inlet one-way valve 410 and causing the liquid inlet one-way valve 410 to be accidentally opened.

[0094] like Figure 4 As shown, the connection joint 800 is provided with a thin flow path 840 and a coarse flow path 850, the coarse flow path 850 is communicated with the first interface 810, and the thin flow path 840 is communicated with the second interface 820 and the coarse flow path 850. In other words, the functional fluid flows from the second interface 820 to the thin flow path 840, and then flows to the first interface 810 through the coarse flow path 850, and flows into the liquid inlet of the first pump body 400.

[0095] In addition, the cross-sectional area of ​​the coarse flow path 850 is larger than the cross-sectional area of ​​the thin flow path 840. On the one hand, the pressure exerted on the liquid in the thin flow path 840 is greater than the pressure exerted on the liquid in the coarse flow path 850. Under the action of the pressure difference, the liquid in the thin flow path 840 can flow into the coarse flow path 850 more smoothly. On the other hand, when the liquid inlet check valve 410 is closed, even if the functional liquid moves in the direction of the liquid inlet check valve 410, the coarse flow path 850 will buffer and store the functional liquid, thereby preventing the functional liquid from flowing directly to the liquid inlet check valve 410, further preventing the functional liquid from rushing open the liquid inlet check valve 410, and preventing the liquid inlet check valve 410 from being opened by mistake, thereby ensuring the normal operation of the first pump body 400.

[0096] like Figure 4As shown, the above-mentioned coarse flow path 850 includes a first coarse section 851 and a second coarse section 852. The first coarse section 851 is connected to the first interface 810, and the second coarse section 852 is connected to the first coarse section 851 and the thin flow path 840. Among them, the central axis of the first coarse section 851 and the central axis of the second coarse section 852 can be arranged to coincide. In other words, the functional fluid flows from the second interface 820 to the thin flow path 840, then flows to the first coarse section 851 through the second coarse section 852, and then flows into the liquid inlet of the first pump body 400 through the first interface 810.

[0097] Furthermore, the cross-sectional area of ​​the first thick section 851 is greater than the cross-sectional area of ​​the second thick section 852. On the one hand, the pressure on the liquid in the second thick section 852 is greater than the pressure on the liquid in the first thick section 851. Under the action of the pressure difference, the liquid in the first thick section 851 can flow into the second thick section 852 more smoothly. On the other hand, when the liquid inlet check valve 410 is closed, even if the functional liquid in the first thick section 851 moves toward the liquid inlet check valve 410, the second thick section 852 will buffer and store the functional liquid, thereby preventing the functional liquid from directly flowing to the liquid inlet check valve 410, further preventing the functional liquid from rushing open the liquid inlet check valve 410, and preventing the liquid inlet check valve 410 from being opened by mistake, thereby ensuring the normal operation of the first pump body 400.

[0098] like Figure 4 As shown, the angle between the central axis of the thin flow path 840 and the central axis of the thick flow path 850 is greater than 0° and less than 180°. In this way, the second interface 620 does not face the liquid inlet check valve 410, and the functional liquid flowing from the second interface 620 to the liquid inlet check valve 410 needs to make at least one turn before reaching the liquid inlet check valve 410, thereby preventing the liquid inlet check valve 410 from being directly impacted by the functional liquid, reducing the impact force on the liquid inlet check valve 410, and extending the service life of the liquid inlet check valve 410. In addition, the functional liquid and the water liquid can reach the liquid inlet check valve 410 only after being fully mixed, thereby preventing the functional liquid from being too viscous and affecting the opening and closing of the liquid inlet check valve 410.

[0099] like Figure 4 and Figure 7 As shown, the first interface 810 of the connecting joint 800 is inserted into the liquid inlet of the first pump body 400. In this way, no additional connecting pipe is required between the connecting joint 800 and the first pump body 400, which can simplify the assembly process and ensure the reliability of the relative position between the connecting joint 800 and the first pump body 400, and shorten the liquid inlet flow path 310, which is conducive to reducing the flow path of the functional liquid.

[0100] In the same time, the ratio of the flow rate of the liquid pumped by the first pump body 400 to the flow rate of the functional liquid pumped by the second pump body 700 is not less than 10. For example, the ratio of the flow rate of the liquid pumped by the first pump body 400 to the flow rate of the functional liquid pumped by the second pump body 700 can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20.

[0101] In this way, the amount of liquid pumped by the first pump body 400 is much greater than the amount of liquid pumped by the second pump body 700, so that the pumping action of the second pump body 700 has little effect on the pumping action of the first pump body 400. When the liquid inlet one-way valve 410 is closed, even if the second pump body 700 continues to run, it will not affect the operation of the first pump body 400, which is conducive to ensuring the normal operation of the first pump body 400.

[0102] The first pump body 400 is a plunger pump or a diaphragm pump, and the second pump body 700 is a peristaltic pump. In this way, on the one hand, it can ensure that the pumping capacity of the first pump body 400 is much greater than that of the second pump body 700, so as to reduce the influence of the second pump body 700 on the first pump body 400. On the other hand, the plunger pump, the diaphragm pump and the peristaltic pump are all positive displacement pump bodies, and the positive displacement pump body can cut off the liquid inlet and the liquid outlet when it stops running, so that the first pump body 400 can prevent the liquid in the liquid outlet flow path 320 from flowing back to the liquid inlet flow path 310, and the second pump body 700 can prevent the functional liquid in the drug outlet flow path 620 from flowing back to the drug inlet flow path 610, so as to avoid leakage and backflow of the functional liquid, and there is no need to set an additional one-way valve on the drug delivery flow path 600, so as to reduce costs and the number of parts.

[0103] like Figure 8 and Fig. 9 As shown (the dotted line in the figure shows the liquid level of the functional liquid), the functional liquid tank 500 is provided with an air inlet 510, and the air inlet 510 is connected to the atmosphere. When the second pump body 700 is running, the functional liquid in the functional liquid tank 500 gradually decreases, and the pressure in the functional liquid tank 500 decreases and is in a negative pressure state. In order to prevent the functional liquid in the functional liquid tank 500 from being unable to flow out, the gas in the atmosphere can be replenished into the functional liquid tank 500 through the air inlet 510 to balance the pressure of the functional liquid tank 500 and the drug outlet flow path 620, so that the second pump body 700 can normally pump the functional liquid from the functional liquid tank 500 to the drug outlet flow path 620, thereby ensuring the normal operation of the dental flosser 1.

[0104] The above-mentioned water flosser 1 further includes a housing 900, at least a portion of the functional liquid tank 500 is disposed in the housing 900, an air inlet 510 is disposed in the portion of the functional liquid tank 500 located in the housing 900, the housing 900 is provided with an air inlet channel 910, and the air inlet 510 is connected to the atmosphere through the air inlet channel 910. The functional liquid tank 500 and the housing 900 may be fixedly connected, or the functional liquid tank 500 and the housing 900 may be detachably connected.

[0105] In this way, when the second pump body 700 is running, the functional liquid in the functional liquid tank 500 gradually decreases, and the pressure in the functional liquid tank 500 decreases and is in a negative pressure state. In order to prevent the functional liquid in the functional liquid tank 500 from being unable to flow out, the atmospheric gas can flow into the functional liquid tank 500 through the air inlet channel 910 and the air inlet hole 510 to balance the pressure of the functional liquid tank 500 and the medicine outlet path 620, so that the second pump body 700 can normally pump the functional liquid from the functional liquid tank 500 to the medicine outlet path 620, thereby ensuring the normal operation of the oral irrigator 1.

[0106] For example, the air inlet channel 910 may be a through hole of the housing 900, or the air inlet channel 910 may be a pipeline. When the air inlet channel 910 is a pipeline, if the air pressure and temperature of the area where the water flosser 1 is located change, the gas in the functional liquid tank 500 may expand or contract. When the gas in the functional liquid tank 500 expands, the functional liquid may be squeezed and flow out to the air inlet channel 910. The functional liquid may be stored in the air inlet channel 910. When the gas in the functional liquid tank 500 contracts, the functional liquid in the air inlet channel 910 may be sucked back into the functional liquid tank 500.

[0107] In some embodiments of the present application, at least a portion of the functional liquid tank 500 is disposed outside the housing 900, and the air inlet 510 is disposed at the portion of the functional liquid tank 500 located outside the housing 900. In this case, the housing 900 may not be provided with an air inlet channel 910, and the air inlet 510 is directly connected to the atmosphere. In this case, a waterproof breathable membrane 920 is disposed at the air inlet 510, and the waterproof breathable membrane 920 allows the functional liquid tank 500 to exchange air with the atmosphere, and the waterproof breathable membrane 920 prevents the liquid in the functional liquid tank 500 from flowing out of the air inlet 510.

[0108] like Fig. 9 As shown, the above-mentioned water flosser 1 further includes a waterproof breathable membrane 920, which is disposed at the air inlet hole 510, or the waterproof breathable membrane 920 is disposed at the air inlet channel 910, or the air inlet hole 510 is provided with the waterproof breathable membrane 920, and the air inlet channel 910 is also provided with the waterproof breathable membrane 920. The waterproof breathable membrane 920 allows the functional liquid tank 500 to exchange air with the atmosphere, and the waterproof breathable membrane 920 prevents the liquid in the functional liquid tank 500 from flowing out of the air inlet hole 510 or the air inlet channel 910.

[0109] In this way, it can be ensured that the functional liquid tank 500 and the atmosphere can be ventilated normally, and it can also be ensured that the functional liquid in the functional liquid tank 500 leaks into the atmosphere, thereby avoiding the waste of the functional liquid.

[0110] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0111] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A water flosser, characterized in that: include: A nozzle having a liquid spraying port; A water tank is connected to the liquid spraying port through a liquid infusion flow path, wherein the liquid infusion flow path includes a liquid inlet flow path and a liquid outlet flow path; A first pump body, arranged in the liquid infusion flow path, used for pumping the water in the water tank to the liquid spray port through the liquid infusion flow path, the liquid inlet flow path is located upstream of the first pump body, and the liquid outlet flow path is located downstream of the first pump body; A functional liquid box is connected to the infusion flow path through a drug delivery flow path, wherein the drug delivery flow path includes a drug inlet flow path and a drug outlet flow path; A second pump body is provided in the drug delivery flow path, and is used to pump the functional liquid in the functional liquid tank to the liquid delivery flow path through the drug delivery flow path, the drug inlet flow path is located upstream of the second pump body, and the drug outlet flow path is located downstream of the second pump body, and the drug inlet flow path is connected to the liquid inlet flow path, or the drug inlet flow path is connected to the liquid outlet flow path; Wherein, when the drug outlet flow path is connected to the liquid inlet flow path, the pressure of the drug outlet flow path is greater than the pressure of the liquid inlet flow path; When the drug outlet flow path is connected to the liquid outlet flow path, the pressure of the drug outlet flow path is greater than the pressure of the liquid outlet flow path.

2. The oral rinser according to claim 1, characterized in that: Also includes: a liquid inlet one-way valve, arranged in the liquid inlet flow path, allowing the liquid in the water tank to flow to the first pump body, and preventing the liquid in the first pump body from flowing to the water tank; Wherein, when the drug outlet flow path is connected with the liquid inlet flow path, the connection point between the drug outlet flow path and the liquid inlet flow path is located upstream of the liquid inlet one-way valve. When the liquid inlet one-way valve is closed, the pressure of the drug outlet flow path is lower than the pressure in the first pump body.

3. The oral rinser according to claim 2, characterized in that: The liquid outlet of the medicine outlet passage and the liquid inlet one-way valve are staggered in the radial direction of the oral irrigator; and / or The liquid outlet of the medicine outlet flow path and the liquid inlet one-way valve are staggered in the length direction of the oral irrigator.

4. The oral rinser according to claim 2, characterized in that: The liquid inlet flow path includes a liquid storage section, and in the extension direction of the liquid inlet flow path, the liquid storage section is located between the liquid inlet of the liquid inlet flow path and the liquid outlet of the drug outlet flow path; When the liquid inlet one-way valve is closed, the flow rate of the functional liquid pumped by the second pump body is smaller than the volume of the liquid storage section.

5. The oral rinser according to claim 1, characterized in that: When the drug outlet flow path is connected to the liquid inlet flow path, the cross-sectional area of ​​the drug outlet flow path is smaller than the cross-sectional area of ​​the liquid inlet flow path; When the drug outlet flow path is connected to the liquid outlet flow path, the cross-sectional area of ​​the drug outlet flow path is smaller than the cross-sectional area of ​​the liquid outlet flow path.

6. The oral rinser according to claim 1, characterized in that: When the drug outlet flow path is connected to the liquid inlet flow path, the ratio of the cross-sectional area of ​​the drug outlet flow path to the cross-sectional area of ​​the liquid inlet flow path is not greater than 1 / 2 and not less than 1 / 9; When the drug outlet flow path is connected to the liquid outlet flow path, the ratio of the cross-sectional area of ​​the drug outlet flow path to the cross-sectional area of ​​the liquid outlet flow path is not greater than 1 / 2 and not less than 1 / 9.

7. The oral rinser according to claim 1, characterized in that: Also includes: A connecting joint is provided with a first interface, a second interface and a third interface. The first interface, the second interface and the third interface are connected to each other. The first interface is connected to the liquid inlet of the first pump body, the second interface is connected to the liquid outlet of the second pump body, and the third interface is connected to the water tank.

8. The oral rinser according to claim 7, characterized in that: The area surrounded by the inner contour of the cross section of the second interface is smaller than the area surrounded by the inner contour of the cross section of the third interface.

9. The oral rinser according to claim 8, characterized in that: The area enclosed by the outer contour of the cross section of the second interface is smaller than the area enclosed by the outer contour of the cross section of the third interface.

10. The oral rinser according to claim 7, characterized in that: Also includes: a liquid inlet one-way valve, provided on the connecting joint and / or the first pump body and adjacent to the first interface; Wherein, in the length direction of the water flosser, the third interface is closer to the water tank than the second interface.

11. The oral rinser according to claim 10, characterized in that: The connection joint is provided with a thin flow path and a coarse flow path, the coarse flow path is communicated with the first interface, and the thin flow path is communicated with the second interface and the coarse flow path; The cross-sectional area of ​​the coarse flow path is larger than the cross-sectional area of ​​the fine flow path.

12. The oral rinser according to claim 11, characterized in that: The rough flow path comprises: A first thick section, connected to the first interface; a second thick section, communicating with the first thick section and the thin flow path; The cross-sectional area of ​​the first thick section is greater than the cross-sectional area of ​​the second thick section.

13. The oral rinser according to claim 11, characterized in that: An angle between a central axis of the thin flow path and a central axis of the thick flow path is greater than 0° and less than 180°.

14. The oral rinser according to claim 7, characterized in that: The first interface of the connecting joint is inserted into the liquid inlet of the first pump body.

15. The oral rinser according to claim 1, characterized in that: In the same time, the ratio of the flow rate of the liquid pumped by the first pump body to the flow rate of the functional liquid pumped by the second pump body is not less than 10.

16. The oral rinser according to claim 1, characterized in that: The first pump body is a plunger pump or a diaphragm pump, and the second pump body is a peristaltic pump.

17. The oral rinser according to claim 1, characterized in that: The functional liquid tank is provided with an air inlet hole, and the air inlet hole is communicated with the atmosphere.

18. The oral rinser according to claim 17, characterized in that: Also includes: The casing, at least a part of the functional liquid tank is arranged in the casing, the air inlet is arranged in the part of the functional liquid tank located in the casing, the casing is provided with an air inlet passage, and the air inlet is connected to the atmosphere through the air inlet passage.

19. The oral rinser according to claim 18, characterized in that: Also includes: A waterproof breathable membrane is provided in the air inlet passage and / or the air inlet hole, allowing the functional liquid tank to exchange air with the atmosphere and preventing the liquid in the functional liquid tank from flowing out of the air inlet passage and / or the air inlet hole.

Images