Water pick

Abstract

The oral irrigator comprises a first liquid storage bin, a second liquid storage bin, a first pump body and an anti-backflow pipeline assembly, the first liquid storage bin is used for storing first oral irrigating liquid, the second liquid storage bin is used for storing second oral irrigating liquid, the first pump body is at least used for sucking the first oral irrigating liquid, and the second pump body is at least used for sucking the second oral irrigating liquid. The anti-backflow pipeline assembly is communicated with the first liquid storage bin, the second liquid storage bin and the first pump body and comprises an anti-backflow element. According to the embodiment of the invention, the anti-backflow pipeline assembly is arranged in the oral irrigator, the anti-backflow pipeline assembly is used for mixing the first oral irrigating liquid and the second oral irrigating liquid to form the mixed liquid before the first pump body is pumped out, so that the mixing uniformity of the mixed liquid is improved, and meanwhile, the anti-backflow element is arranged in the anti-backflow pipeline assembly, so that the anti-backflow effect is improved. The backflow of the mixed liquid is prevented.

Description

Technical Field

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

[0002] The water flosser may include a main unit and a water tank, wherein the water tank is used to store clean water, and a water pump in the main unit may pump out the clean water in the water tank, so that the water pump sprays the clean water to the teeth through the nozzle in the form of a pulsed water column, thereby cleaning the user's oral cavity. However, in the related art, in order to realize the multifunctional cleaning of the user's oral cavity by the water flosser, it is necessary to pour a cleaning liquid with multifunctional components into the water tank, so that the cleaning liquid and the clean water are mixed to form a mixed liquid, and then the water pump is operated to pump out the mixed liquid, and the mixed liquid sometimes needs to be shaken by the water flosser to fully mix the cleaning liquid and the clean water. If the mixed liquid is not shaken evenly, it is easy to reduce the mixing uniformity of the mixed liquid.

[0003] At the same time, when the user pours the cleaning liquid into the water tank and shakes the water flosser to make the mixed liquid more complete, not only does the user have to wait while rinsing his teeth, but the cleaning of the water tank also becomes more difficult. Utility Model Content

[0004] The embodiment of the present application provides a water flosser, which aims to improve the mixing uniformity of a mixed liquid and prevent the backflow of the mixed liquid.

[0005] An embodiment of the present application provides a dental irrigator, which includes a first liquid storage tank, a second liquid storage tank, a first pump body and an anti-backflow pipeline assembly, wherein the first liquid storage tank is used to store a first dental irrigator, the second liquid storage tank is used to store a second dental irrigator, the first pump body is used to at least suck the first dental irrigator in the first liquid storage tank, the anti-backflow pipeline assembly is connected to the first liquid storage tank, the second liquid storage tank and the first pump body, the anti-backflow pipeline assembly is used to mix the first dental irrigator and the second dental irrigator to form a mixed liquid before being pumped out by the first pump body, wherein the anti-backflow pipeline assembly includes an anti-backflow element, and the anti-backflow element is used to prevent the mixed liquid from flowing back to the first liquid storage tank and / or the second liquid storage tank.

[0006] Furthermore, the anti-backflow pipeline assembly also includes a first connecting pipe and a second connecting pipe, the liquid inlet end of the first connecting pipe is connected to the first liquid storage tank, the liquid outlet end of the first connecting pipe is connected to the water inlet of the first pump body, the liquid inlet end of the second connecting pipe is connected to the second liquid storage tank, and the liquid outlet end of the second connecting pipe is connected to the water inlet of the first pump body, wherein the anti-backflow element is arranged on the first connecting pipe and / or the second connecting pipe.

[0007] Furthermore, the anti-backflow pipeline assembly also includes a manifold and a three-way element, the liquid outlet end of the manifold is connected to the water inlet of the first pump body, the three-way element includes a first connecting pipe joint, a second connecting pipe joint and a manifold joint, the liquid outlet end of the first connecting pipe is connected to the first connecting pipe joint, the liquid outlet end of the second connecting pipe is connected to the second connecting pipe joint, and the liquid inlet end of the manifold is connected to the manifold joint, so that the first dental flushing solution and the second dental flushing solution are mixed in the three-way element and the manifold, wherein the anti-backflow element is arranged on at least one of the first connecting pipe, the second connecting pipe and the manifold.

[0008] Further, the three-way element includes a three-way pipe, and the anti-backflow element is arranged on the manifold, or the three-way element includes a three-way pipe, and two anti-backflow elements are respectively arranged on the first connecting pipe and the second connecting pipe, or the three-way element includes a three-way valve, and the anti-backflow element is arranged on one of the first connecting pipe and the second connecting pipe, and the three-way valve is used as the anti-backflow element of the other of the first connecting pipe and the second connecting pipe.

[0009] Furthermore, the anti-backflow element includes a manifold one-way valve, which is arranged on the manifold, wherein when the first pump body is working, the manifold one-way valve is subjected to the positive pressure of the first pump body to make the manifold one-way valve conductive, and when the first pump body stops working, the manifold one-way valve is subjected to the negative pressure or zero pressure difference of the first pump body to close the manifold one-way valve.

[0010] Furthermore, the manifold comprises a flow expansion section, and along the flow direction of the mixed liquid flowing toward the first pump body, the flow cross-section of the flow expansion section gradually increases.

[0011] Furthermore, the length of the manifold is shorter than that of the first connecting pipe, so that the three-way element is located in the downstream section of the main pipeline formed by the first connecting pipe and the manifold.

[0012] Furthermore, the three-way element includes a three-way pipe, the first pump body includes a pump casing and a pump body, the pump casing includes two covers that cover each other, the three-way pipe is arranged at the covering position of the two covers to be clamped and fixed by the two covers, and the pump body is arranged in the pump casing.

[0013] Furthermore, the backflow prevention element includes a second pump body, which is arranged on the second connecting pipe, and the second pump body is used to extract the second dental rinse solution in the second liquid storage tank and to prevent the mixed liquid from flowing back to the second liquid storage tank.

[0014] Furthermore, the oral irrigator also includes a detection element and a controller. The detection element is arranged in the second liquid storage tank to detect the remaining amount of the second oral irrigating liquid in the second liquid storage tank, or is arranged on the second connecting tube to detect the flow rate of the second oral irrigating liquid in the second connecting tube. The controller is electrically connected to the detection element and the second pump body, and the controller is used to control the second pump body to close when the remaining amount is lower than a set remaining amount or the flow rate is lower than a set flow rate.

[0015] Further, the second connecting pipe joint extends toward the second pump body, and / or a pipe joint provided with the second pump body extends toward the second connecting pipe joint.

[0016] Furthermore, the second pump body and the first pump body are arranged on the same side of one of the mid-section planes of the oral irrigator which is parallel to its own height direction.

[0017] Furthermore, the connecting pipe between the second pump body and the second liquid storage tank is a hose, the second connecting pipe includes the hose, and the diameter of the hose is not less than 1 mm and not more than 5 mm.

[0018] Furthermore, the second pump body is a positive displacement pump body, and the positive displacement pump body includes at least one of a diaphragm pump, a plunger pump, and a peristaltic pump.

[0019] Furthermore, the anti-backflow element includes a second connecting pipe one-way valve, which is arranged on the second connecting pipe, wherein when the first pump body is working, the second connecting pipe one-way valve is subjected to the positive pressure of the first pump body to make the second connecting pipe one-way valve conductive, and when the first pump body stops working, the second connecting pipe one-way valve is subjected to the negative pressure or zero pressure difference of the first pump body to close the second connecting pipe one-way valve.

[0020] Furthermore, the second liquid storage tank is opposite to the first pump body and is spaced apart from each other, the second connecting pipe joint extends toward the second liquid storage tank, and / or the pipe joint of the second liquid storage tank extends toward the first pump body.

[0021] Furthermore, in the height direction of the oral irrigator, the height of the second liquid storage tank is higher than the height of the water inlet of the first pump body.

[0022] Furthermore, the oral irrigator also includes a controller, which is electrically connected to the first pump body and the anti-backflow element, wherein the controller controls the anti-backflow element to be turned on while controlling the first pump body to work, and controls the anti-backflow element to be turned off while controlling the first pump body to stop working.

[0023] Furthermore, the backflow prevention element includes at least one of a positive displacement pump body, a one-way valve and a solenoid valve.

[0024] Furthermore, the second liquid storage tank has an air inlet, and the air inlet is provided with an air inlet tube and / or a waterproof breathable membrane.

[0025] The present application provides a water flosser, which has at least the following two effects:

[0026] First, the mixing uniformity of the mixed liquid is improved. Since the anti-backflow pipeline assembly is connected to the first liquid storage tank, the second liquid storage tank and the first pump body, the first dental rinse and the second dental rinse can be mixed at the front end of the first pump body to form a mixed liquid, and then the first pump body pressurizes the mixed liquid and sprays it onto the user's teeth through the nozzle, that is, the mixed liquid formed by the first dental rinse and the second dental rinse can flow through the flow channel of the first pump body and the nozzle before being sprayed from the liquid outlet of the nozzle, so that the first dental rinse and the second dental rinse can be evenly and fully mixed to form a mixed liquid, and the flow path of the mixed liquid is longer, thus improving the mixing uniformity of the mixed liquid.

[0027] Second, prevent the mixed liquid from flowing back. By setting the anti-backflow element in the anti-backflow pipeline assembly, the mixed liquid is prevented from flowing back into the first liquid storage tank and the second liquid storage tank, so that the mixed liquid retained at the front end of the first pump body can be sprayed out through the nozzle after being pressurized by the first pump body, thus preventing the mixed liquid from flowing back. Furthermore, since the mixed liquid is prevented from flowing back into the first liquid storage tank and the second liquid storage tank, the first flushing liquid in the first liquid storage tank can be kept in its original pure state, and the second flushing liquid in the second liquid storage tank can be kept in its original pure state, so that during the flushing process, the ratio between the first flushing liquid and the second flushing liquid in the mixed liquid can be conveniently adjusted to achieve the required specific cleaning effect. If the mixed liquid flows back into the first liquid storage tank and the second liquid storage tank, it is difficult to adjust the ratio between the first flushing liquid and the second flushing liquid in the mixed liquid when the mixed liquid is subsequently prepared, and a mixed liquid with a specific cleaning effect cannot be obtained. Moreover, when the mixed liquid flows back into the first liquid storage tank, it is easy to cause the first liquid storage tank to be difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the structure of a water flosser in one embodiment of the present application;

[0030] Figure 2 This is a partial structural schematic diagram of a water flosser in one embodiment of the present application;

[0031] Figure 3 This is a schematic diagram of a module of a water flosser in one embodiment of the present application;

[0032] Figure 4 This is a schematic diagram of the structure of a water flosser from another perspective in one embodiment of the present application;

[0033] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the water flosser along the BB section;

[0034] Figure 6 for Figure 5 The enlarged structural diagram of the middle C part;

[0035] Figure 7 This is a schematic diagram of another part of the structure of the oral irrigator in one embodiment of the present application;

[0036] Figure 8 for Figure 7 The enlarged structural diagram of the middle D part;

[0037] Fig. 9 This is a schematic diagram of a module of an air inlet of a second liquid storage tank in one embodiment of the present application;

[0038] Fig.10 This is a module schematic diagram of the air inlet of the second liquid storage tank in another embodiment of the present application.

[0039] Explanation of the accompanying reference numerals: 1- water flosser; 10- nozzle; 20- housing; 20a- installation space; 30- first liquid storage tank; 40- second liquid storage tank; 40a- air inlet; 41- air inlet capillary; 42- waterproof breathable membrane; 50- first pump body; 51- pump housing; 511- cover body; 60- anti-backflow pipeline assembly; 61- anti-backflow element; 611- second pump body; 62- first connecting pipe; 63- second connecting pipe; 64- confluence pipe; 641- expansion section; 65- three-way element; 651- first connecting pipe joint; 652- second connecting pipe joint; 70- battery. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] See also Figure 1An embodiment of the present application provides a water flosser 1 , which may include a nozzle 10 and a housing 20 .

[0042] Specifically, the casing 20 serves as an appearance component of the oral irrigator 1 and is suitable for being held by the user to facilitate the user to hold the oral irrigator 1. The casing 20 can be a cylindrical structure, and the main structure of the casing 20 can be a plastic material, for example, it can include but is not limited to hard plastics, such as polyethylene, polyester and other thermoplastic plastics suitable for toothbrush manufacturing. The main structure of the casing 20 can also be a metal material, such as aluminum alloy. The embodiment of the present application does not specifically limit the material used for the main structure of the casing 20.

[0043] See also Figure 2-Figure 3 Furthermore, the interior of the housing 20 has an installation space 20a, and the oral irrigator 1 also includes a first liquid storage tank 30, a second liquid storage tank 40, and a first pump body 50.

[0044] Specifically, the first liquid storage tank 30 can be arranged in the installation space 20a, or can be arranged outside the installation space 20a, or partially arranged in the installation space 20a. At least part of the second liquid storage tank 40 and the first pump body 50 are installed in the installation space 20a, so that the housing 20 can protect the second liquid storage tank 40 and the first pump body 50 installed in the housing 20. The first liquid storage tank 30 is used to store the first dental rinse, the second liquid storage tank 40 is used to store the second dental rinse, and the first pump body 50 is at least used to pump the first dental rinse in the first liquid storage tank 30, that is, the first pump body 50 can be used to pump the first dental rinse in the first liquid storage tank 30, the first pump body 50 can also be used to pump the second dental rinse in the second liquid storage tank 40, and the first pump body 50 can also be used to pump the mixed liquid formed by the first dental rinse and the second dental rinse. The types of the first and second rinsing solutions in the embodiment of the present application are not specifically limited. For example, the first rinsing solution can be water, and the second rinsing solution can be a liquid medicine or other functional solvent with whitening, sterilization and other functions. The following embodiments take the first rinsing solution as water and the second rinsing solution as liquid medicine as an example.

[0045] See also Figure 3Furthermore, the dental flosser 1 also includes an anti-backflow pipeline assembly 60, which is connected to the first liquid storage tank 30, the second liquid storage tank 40 and the first pump body 50, and the anti-backflow pipeline assembly 60 is used to mix the first dental floss liquid and the second dental floss liquid before being pumped out by the first pump body 50 to form a mixed liquid, that is, the first pump body 50 can be connected to the first liquid storage tank 30 and the second liquid storage tank 40 through the anti-backflow pipeline assembly 60, and the first pump body 50 can be used to extract the first dental floss liquid from the first liquid storage tank 30 into the anti-backflow pipeline assembly 60, and the first pump body 50 can also extract the second dental floss liquid from the second liquid storage tank 40 to the anti-backflow pipeline assembly 60, because the backflow prevention pipeline assembly 60 is connected with the first liquid storage tank 30, the second liquid storage tank 40 and the first pump body 50, the first dental rinse and the second dental rinse can be mixed at the front end of the first pump body 50 to form a mixed liquid, and then the first pump body 50 pressurizes the mixed liquid and sprays it onto the user's teeth through the nozzle 10, that is, the mixed liquid formed by the first dental rinse and the second dental rinse can flow through the flow channel of the first pump body 50 and the nozzle 10 before being sprayed from the liquid outlet of the nozzle 10, so that the first dental rinse and the second dental rinse can be evenly and fully mixed to form a mixed liquid, and the flow path of the mixed liquid is longer, thereby improving the mixing uniformity of the mixed liquid.

[0046] Please continue reading Figure 3Furthermore, the backflow prevention pipeline assembly 60 includes an anti-backflow element 61. It can be understood that after the mixed liquid is fully mixed at the front end of the first pump body 50, the first pump body 50 pressurizes the mixed liquid and then sprays it out through the nozzle 10. Since the backflow prevention pipeline assembly 60 is connected to the first liquid storage tank 30, the second liquid storage tank 40 and the first pump body 50, when the first dental rinse solution and the second dental rinse solution are mixed to form a mixed liquid, the mixed liquid may flow back to at least one of the first liquid storage tank 30 and the second liquid storage tank 40. By setting the anti-backflow element 61, the mixed liquid can be prevented from flowing back to the first liquid storage tank 30, the second liquid storage tank 40 or flowing back to the first liquid storage tank 30 and the second liquid storage tank 40 at the same time, so that the mixed liquid retained at the front end of the first pump body 50 can be pumped out after being pressurized by the first pump body 50, so that the backflow of the mixed liquid can be prevented. Furthermore, since the mixed liquid is prevented from flowing back into the first liquid storage tank 30 and the second liquid storage tank 40, the first dental flushing liquid in the first liquid storage tank 30 can be kept in its original pure state, and the second dental flushing liquid in the second liquid storage tank 40 can be kept in its original pure state, so that during the dental flushing process, it is convenient to adjust the ratio between the first dental flushing liquid and the second dental flushing liquid in the mixed liquid to achieve the desired specific cleaning effect. If the mixed liquid flows back into the first liquid storage tank 30 and the second liquid storage tank 40, it is difficult to adjust the ratio between the first dental flushing liquid and the second dental flushing liquid in the mixed liquid during the subsequent mixing of the mixed liquid, and it is impossible to obtain a mixed liquid with a specific cleaning effect. Moreover, when the mixed liquid flows back into the first liquid storage tank 30, the first liquid storage tank 30 is difficult to be cleaned due to the presence of the mixed liquid in the first liquid storage tank 30.

[0047] Based on the above embodiments, the embodiments of the present application have at least the following two effects:

[0048] First, the mixing uniformity of the mixed liquid is improved. Since the anti-backflow pipeline assembly 60 is connected to the first liquid storage tank 30, the second liquid storage tank 40 and the first pump body 50, the first dental rinse and the second dental rinse can be mixed at the front end of the first pump body 50 to form a mixed liquid, and then the first pump body 50 pressurizes the mixed liquid and sprays it onto the user's teeth through the nozzle 10, that is, the mixed liquid formed by the first dental rinse and the second dental rinse can flow through the flow channel of the first pump body 50 and the nozzle 10 before being sprayed from the liquid outlet of the nozzle 10, so that the first dental rinse and the second dental rinse can be evenly and fully mixed to form a mixed liquid, and the flow path of the mixed liquid is longer, thereby improving the mixing uniformity of the mixed liquid.

[0049] Second, prevent the mixed liquid from flowing back. By setting the anti-backflow element 61 in the anti-backflow pipeline assembly 60, the mixed liquid is prevented from flowing back into the first liquid storage tank 30 and the second liquid storage tank 40, so that the mixed liquid retained at the front end of the first pump body 50 can be pressurized by the first pump body 50 and sprayed out through the nozzle 10, so that the mixed liquid can be prevented from flowing back. Furthermore, since the mixed liquid is prevented from flowing back into the first liquid storage tank 30 and the second liquid storage tank 40, the first dental flushing liquid in the first liquid storage tank 30 can be kept in its original pure state, and the second dental flushing liquid in the second liquid storage tank 40 can be kept in its original pure state, so that during the dental flushing process, it is convenient to adjust the ratio between the first dental flushing liquid and the second dental flushing liquid in the mixed liquid to achieve the desired specific cleaning effect. If the mixed liquid flows back into the first liquid storage tank 30 and the second liquid storage tank 40, it is difficult to adjust the ratio between the first dental flushing liquid and the second dental flushing liquid in the mixed liquid during the subsequent mixing of the mixed liquid, and it is impossible to obtain a mixed liquid with a specific cleaning effect. Moreover, when the mixed liquid flows back into the first liquid storage tank 30, it is easy to make the first liquid storage tank 30 difficult to clean.

[0050] It should be noted that the anti-backflow element 61 may include at least one of a positive displacement pump body, a one-way valve and a solenoid valve. The anti-backflow element 61 may also be other parts with an anti-backflow function, and the embodiment of the present application does not make specific limitations on this.

[0051] Specifically, the volumetric pump body mainly relies on working parts such as pistons, plungers, diaphragms, gears or blades to perform reciprocating or rotary motion in the pump body, so that the volume of the working chamber in the pump body changes periodically, and then alternately draws in or discharges liquid; a one-way valve is a control valve in which the fluid can only flow along the water inlet of the one-way valve, while the fluid at the water outlet of the one-way valve cannot flow back; a solenoid valve is a valve that uses an electromagnet to manipulate the movement of the valve core.

[0052] See also Figure 3-Figure 4 In some embodiments, the backflow prevention pipeline assembly 60 also includes a first connecting pipe 62 and a second connecting pipe 63, the liquid inlet end of the first connecting pipe 62 is connected to the first liquid storage tank 30, the liquid outlet end of the first connecting pipe 62 is connected to the water inlet of the first pump body 50, the liquid inlet end of the second connecting pipe 63 is connected to the second liquid storage tank 40, and the liquid outlet end of the second connecting pipe 63 is connected to the water inlet of the first pump body 50.

[0053] Specifically, the first pump body 50 can pump the first dental flushing liquid stored in the first liquid storage tank 30 into the first connecting tube 62, so that the first dental flushing liquid flows to the water inlet of the first pump body 50. The first pump body 50 can also suck the second dental flushing liquid stored in the second liquid storage tank 40 into the second connecting tube 63, so that the second dental flushing liquid flows to the water inlet of the first pump body 50. In this way, the first dental flushing liquid and the second dental flushing liquid can be mixed in the first pump body 50 to form a mixed liquid, and the mixed liquid is pressurized by the first pump body 50 and then ejected through the nozzle 10. At this time, the mixed liquid passes through the flow channels of the first pump body 50 and the nozzle 10 before being ejected from the liquid outlet of the nozzle 10, so that the first dental flushing liquid and the second dental flushing liquid can be evenly and fully mixed into a mixed liquid. In this way, the effect of the dental flushing device 1 on teeth cleaning can be improved.

[0054] Furthermore, the backflow prevention element 61 can be arranged on the first connecting pipe 62, can be arranged on the second connecting pipe 63, or can be arranged on both the first connecting pipe 62 and the second connecting pipe 63. Figure 3 As shown, the backflow prevention element 61 is disposed on both the first connecting tube 62 and the second connecting tube 63 . The embodiment of the present application does not specifically limit the location of the backflow prevention element 61 .

[0055] See also Figure 3-Figure 4 Further, in some embodiments, the anti-backflow pipeline assembly 60 also includes a manifold 64 and a three-way element 65. The three-way element 65 may include a first connecting pipe joint 651, a second connecting pipe joint 652 and a manifold joint. The three-way element 65 may connect the first connecting pipe 62, the second connecting pipe 63 and the manifold 64, that is, the liquid inlet end of the first connecting pipe 62 is connected to the first liquid storage tank 30, the liquid outlet end of the first connecting pipe 62 is connected to the first connecting pipe joint 651, the liquid inlet end of the second connecting pipe 63 is connected to the second liquid storage tank 40, the liquid outlet end of the second connecting pipe 63 is connected to the second connecting pipe joint 652, the liquid outlet end of the manifold 64 is connected to the water inlet of the first pump body 50, and the liquid inlet end of the manifold 64 is connected to the manifold joint. In this way, the first dental rinse and the second dental rinse can be mixed in the three-way element 65 and the manifold 64 to form a mixed liquid.

[0056] At this time, the anti-backflow element 61 can be arranged on at least one of the first connecting pipe 62, the second connecting pipe 63 and the confluence pipe 64, that is, Figure 3As shown, the first connecting pipe 62, the second connecting pipe 63 and the manifold 64 are all provided with an anti-backflow element 61, but in some embodiments, at least one of the first connecting pipe 62, the second connecting pipe 63 and the manifold 64 is provided with an anti-backflow element 61, and the anti-backflow element 61 can prevent the backflow of the mixed liquid, thereby allowing the mixed liquid to remain in the three-way element 65 and the manifold 64, that is, the mixed liquid can be fully mixed in the three-way element 65 and the manifold 64, and the mixed liquid is ejected from the liquid outlet of the nozzle 10 only after flowing through the flow channel of the first pump body 50 and the nozzle 10, thereby improving the mixing uniformity of the mixed liquid.

[0057] Furthermore, the three-way element 65 may include a three-way pipe. In some embodiments, when the anti-backflow element 61 is arranged on the manifold 64, that is, when the first dental rinse and the second dental rinse are mixed on the manifold 64, by arranging the anti-backflow element 61 on the manifold 64, the mixed liquid on the manifold 64 can be prevented from flowing back to the first connecting tube 62 and the second connecting tube 63.

[0058] Furthermore, since the three-way element 65 is disposed at the front end of the first pump body 50, that is, the first dental rinse solution and the second dental rinse solution are mixed on the manifold 64 before entering the first pump body 50, thus improving the uniformity of the mixed solution.

[0059] When the anti-backflow element 61 is respectively arranged on the first connecting tube 62 and the second connecting tube 63, the mixed liquid in the conduit 64 can be prevented from flowing back into the first liquid storage tank 30 and the second liquid storage tank 40. In this way, the first dental flushing liquid in the first liquid storage tank 30 can be kept in its original pure state, and the second dental flushing liquid in the second liquid storage tank 40 can be kept in its original pure state. During the dental flushing process, it is convenient to adjust the ratio between the first dental flushing liquid and the second dental flushing liquid in the mixed liquid to achieve the desired specific cleaning effect.

[0060] Furthermore, the anti-backflow element 61 is arranged on the first connecting pipe 62, which can prevent the mixed liquid in the conduit 64 from flowing back into the first liquid storage tank 30, thereby maintaining the original pure state of the first liquid storage tank 30, thus facilitating the cleaning of the first liquid storage tank 30.

[0061] In some other embodiments, the three-way element 65 may include a three-way valve, the anti-backflow element 61 is arranged on one of the first connecting pipe 62 and the second connecting pipe 63, and the three-way valve is used as the other anti-backflow element 61 in the first connecting pipe 62 and the second connecting pipe 63, that is, the number of the anti-backflow element 61 is one, and the anti-backflow element 61 can be arranged on the first connecting pipe 62 or on the second connecting pipe 63. The embodiment of the present application does not make specific restrictions on this. For example, when the anti-backflow element 61 is arranged on the first connecting pipe 62, the three-way valve needs to be It is to be arranged on the second connecting pipe 63, and the three-way valve also has the function of preventing backflow. In this way, the mixed liquid in the first connecting pipe 62 and the second connecting pipe 63 can be prevented from flowing back into the first liquid storage tank 30 and the second liquid storage tank 40, that is, the first dental flushing liquid in the first liquid storage tank 30 can be kept in its original pure state, and the second dental flushing liquid in the second liquid storage tank 40 can be kept in its original pure state, so that during the dental flushing process, the ratio between the first dental flushing liquid and the second dental flushing liquid in the mixed liquid can be conveniently adjusted to achieve the required specific cleaning effect.

[0062] See also Figure 5-Figure 6 Further, in some embodiments, the manifold 64 may include a flow expansion section 641. It can be understood that the first dental rinse and the second dental rinse can be mixed in the flow expansion section 641 of the manifold 64 to form a mixed liquid, and the flow expansion section 641 is arranged at the front end of the first pump body 50, that is, the mixed liquid has been mixed before entering the first pump body 50, and the second dental rinse has whitening, sterilization, deodorization and other functions, so that the second dental rinse has a concentration, and by mixing the first dental rinse with the second dental rinse at the front end of the first pump body 50, the concentration of the second dental rinse can be diluted, thereby reducing the corrosiveness of the second dental rinse to the first pump body 50.

[0063] In some embodiments, the anti-backflow element 61 also includes a manifold one-way valve, which is arranged on the manifold 64. When the first pump body 50 is working, the manifold one-way valve is affected by the positive pressure of the first pump body 50, so that the manifold one-way valve is turned on. When the first pump body 50 stops working, the manifold one-way valve is affected by the negative pressure or zero pressure difference of the first pump body 50, so that the manifold one-way valve is closed. In this way, the mixed liquid on the manifold 64 can be prevented from flowing back into the first liquid storage tank 30 and the second liquid storage tank 40.

[0064] See also Figure 7In some embodiments, the length of the manifold 64 is shorter than the length of the first connecting tube 62, so that the three-way element 65 is located in the downstream section of the main pipeline formed by the first connecting tube 62 and the manifold 64, that is, the first connecting tube joint 651 in the three-way element 65 is closer to the downstream section, so that the time for the first dental flushing solution to flow to the manifold 64 is longer than the time for the second dental flushing solution to flow to the manifold 64, that is, the time for the second dental flushing solution to flow on the second connecting tube 63 is shorter, so that the corrosion of the second dental flushing solution to the second connecting tube 63 can be avoided.

[0065] Please continue reading Figure 7 Based on the fact that the three-way element 65 includes a three-way pipe, in some embodiments, the first pump body 50 may include a pump casing 51 and a pump body.

[0066] Specifically, a water inlet and a water outlet connected to the inner cavity of the pump housing 51 are formed on the pump housing 51, that is, the water inlet and the water outlet of the first pump body 50. The pump body is arranged in the inner cavity of the pump housing 51 so that the pump body can be protected by the pump housing 51, wherein the pump body may include a motor and a pump body, etc., and the water flosser 1 also includes a battery 70, the battery 70 is arranged in the installation space 20a, and the battery 70 can power the motor, the motor and the pump body are transmission connected, and the pump body is connected to the manifold 64. It can be understood that when the battery 70 powers the motor, the motor in the first pump body 50 works, so that the motor and the pump body are transmission connected, thereby realizing the pressurization of the mixed liquid in the manifold 64 and spraying it through the nozzle 10.

[0067] Please continue reading Figure 7 Furthermore, the pump housing 51 includes two cover bodies 511 that cover each other, and the three-way pipe can be assembled at the covering position of the two cover bodies 511, so that the three-way pipe is clamped and fixed by the two cover bodies 511, so as to prevent the three-way pipe from loosening due to the water flosser 1 accidentally falling to the ground, or from being separated from the original position due to the vibration of the motor in the first pump body 50. That is, by clamping and fixing the three-way pipe by the two cover bodies 511, the stability of the three-way pipe assembly can be improved.

[0068] In some embodiments, the backflow prevention element 61 includes a second pump body 611, which can be arranged on the second connecting pipe 63, that is, the second pump body 611 is arranged between the second liquid storage tank 40 and the three-way element 65. When the second pump body 611 is working, the second pump body 611 can be used to extract the second dental rinse in the second liquid storage tank 40 to the second connecting pipe 63, so that the second dental rinse can flow to the three-way element 65 and the manifold 64 to mix with the first dental rinse. On the other hand, it can also be used to prevent the mixed liquid in the three-way element 65 and the manifold 64 from flowing back into the second liquid storage tank 40, and can avoid directly extracting the second dental rinse in the second liquid storage tank 40 when the first pump body 50 is working, thereby avoiding the problem of rapid loss of the second dental rinse in the second liquid storage tank 40. That is, the second pump body 611 can control the flow rate of the second dental rinse extracted into the second connecting pipe 63, so that the mixing ratio of the second dental rinse and the first dental rinse can be adjusted.

[0069] Furthermore, in some embodiments, the second pump body 611 is a positive displacement pump body, which may include at least one of a diaphragm pump, a plunger pump, and a peristaltic pump, which is not specifically limited in the embodiments of the present application.

[0070] For example, when the second pump body 611 is a peristaltic pump, the flow rate of the second rinsing solution drawn into the second connecting tube 63 can be controlled by controlling the motor speed of the peristaltic pump, thereby adjusting the mixing ratio of the second rinsing solution to the first rinsing solution.

[0071] Furthermore, in some embodiments, the oral irrigator 1 may also include a detection element and a controller. The detection element may be disposed in the second liquid storage tank 40 or on the second connecting tube 63. The embodiment of the present application does not specifically limit the location of the detection element. The controller may be electrically connected to both the detection element and the second pump body 611.

[0072] Specifically, if the detection element is disposed in the second liquid storage tank 40, the detection element can detect the remaining amount of the second dental rinse solution in the second liquid storage tank 40. When the detection element detects that the remaining amount of the second dental rinse solution in the second liquid storage tank 40 is lower than the set remaining amount, the detection element sends a signal to the controller indicating that the remaining amount of the second dental rinse solution is lower than the set remaining amount. The controller can control the second pump body 611 to close according to the received signal indicating that the remaining amount of the second dental rinse solution is lower than the set remaining amount, so that the second pump body 611 stops working. In this way, the second pump body 611 can be prevented from idling.

[0073] If the detection element is provided on the second connecting tube 63, the detection element can detect the flow rate of the second dental flushing solution in the second connecting tube 63. When the detection element detects that the flow rate of the second dental flushing solution in the second connecting tube 63 is lower than the set flow rate, the detection element can send a signal indicating that the flow rate of the second dental flushing solution is lower than the set flow rate to the controller. The controller can control the second pump body 611 to close according to the received signal indicating that the remaining amount of the second dental flushing solution is lower than the set remaining amount, so that the second pump body 611 stops working. In this way, idling of the second pump body 611 can be avoided.

[0074] See also Figure 7-Figure 8 In some embodiments, the second connecting pipe joint 652 extends toward the second pump body 611, that is, the second connecting pipe joint 652 is closer to the second pump body 611, so that the path connecting the second pump body 611 and the second connecting pipe joint 652 is shortened. When the second pump body 611 extracts the second dental rinse solution in the second liquid storage tank 40, the path between the second pump body 611 and the second connecting pipe joint 652 is shortened, so the flow path of the second dental rinse solution on the second connecting pipe 63 is shortened, so that the second dental rinse solution can flow to the front end of the first pump body 50 in time, thereby improving the efficiency of the second dental rinse solution flowing to the front end of the first pump body 50.

[0075] Please continue reading Figure 7-Figure 8 In some other embodiments, the pipe joint of the second pump body 611 extends to the second connecting pipe joint 652. It can be understood that the pipe joint of the second pump body 611 can be connected to the second connecting pipe joint 652 through a hose, and because the pipe joint of the second pump body 611 is closer to the second connecting pipe joint 652, the length of the hose required to be used is shorter, that is, the path between the second pump body 611 and the second connecting pipe joint 652 is shortened, so that the flow path of the second dental rinse solution on the second connecting tube 63 is shortened, and the second dental rinse solution can flow to the front end of the first pump body 50 in time, thereby improving the efficiency of the second dental rinse solution flowing to the front end of the first pump body 50.

[0076] Please continue reading Figure 7-Figure 8 In another embodiment, while the second connecting pipe joint 652 extends toward the second pump body 611, the pipe joint of the second pump body 611 also extends toward the second connecting pipe joint 652, that is, the pipe joint of the second pump body 611 can be connected to the second connecting pipe joint 652 through a hose, and the length of the hose required to be used is shorter. In this way, the flow path of the second dental rinse solution on the second connecting pipe 63 can be shortened, thereby improving the efficiency of the second dental rinse solution flowing to the front end of the first pump body 50.

[0077] See also Figure 7In some embodiments, the second pump body 611 and the first pump body 50 are arranged on the same side of one of the mid-sections of the oral irrigator 1 which is parallel to its own height direction AA, that is, the water inlet of the second pump body 611 and the first pump body 50 can be arranged on the same side, so that the path for connecting the second connecting pipe 63 and the second connecting pipe joint 652 is shortened, thereby shortening the path for the second oral irrigant to flow in the second connecting pipe 63, thereby improving the efficiency of the second oral irrigant flowing to the front end of the first pump body 50.

[0078] See also Fig. 9 In some embodiments, the connecting pipe between the second pump body 611 and the second liquid storage tank 40 can be a hose, that is, the second connecting pipe 63 includes a hose connected between the second pump body 611 and the second liquid storage tank 40. The hose can be a plastic hose, a metal hose, or a hard hose. This application does not make any specific limitations on this.

[0079] Furthermore, the diameter of the hose is not less than 1 mm and not more than 5 mm. For example, the diameter of the hose can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. In this way, the second dental flushing solution can form a liquid film in the hose and flow to the front end of the first pump body 50, so that there is less air at the front end of the first pump body 50, thereby increasing the speed at which the first pump body 50 pumps out the mixed liquid.

[0080] If the diameter of the hose is greater than 5 mm, at this time, the diameter of the hose is larger, which can allow the second dental flushing solution and air in the second liquid storage tank 40 to mix and flow through the hose to the front end of the first pump body 50. When there is more air at the front end of the first pump body 50, it is easy to cause the speed of the first pump body 50 pumping out the mixed liquid to decrease. If the diameter of the hose is less than 1 mm, at this time, the diameter of the hose is smaller, which is easy to cause the second pump body 611 to draw out a smaller flow of the second dental flushing solution to the second connecting tube 63, that is, the flow of the second dental flushing solution flowing to the front end of the first pump body 50 is small, which is easy to affect the mixing ratio of the first dental flushing solution and the second dental flushing solution to form a mixed liquid, thereby causing the dental flusher 1 to be unable to obtain a mixed liquid with a specific cleaning effect.

[0081] In some embodiments, the anti-backflow element 61 includes a second connecting pipe one-way valve, which is arranged on the second connecting pipe 63. When the first pump body 50 is working, the second connecting pipe one-way valve is affected by the positive pressure of the first pump body 50, so that the second connecting pipe one-way valve is turned on. When the first pump body 50 stops working, the second connecting pipe one-way valve is affected by the negative pressure or zero pressure difference of the first pump body 50, so that the second connecting pipe one-way valve is closed. In this way, the mixed liquid on the second connecting pipe 63 can be prevented from flowing back into the second liquid storage tank 40.

[0082] See also Figure 3-Figure 4Further, in some embodiments, the second liquid storage tank 40 is opposite to the first pump body 50 and is arranged at an interval, and the second connecting pipe joint 652 can extend toward the second liquid storage tank 40, or the pipe joint of the second liquid storage tank 40 extends toward the first pump body 50, or while the second connecting pipe joint 652 extends toward the second liquid storage tank 40, the pipe joint of the second dental flossing tank extends toward the first pump body 50. The present application does not make specific limitations on this.

[0083] Illustratively, when the second connecting pipe joint 652 extends toward the second liquid storage tank 40, the length of the second connecting pipe 63 connecting the second connecting pipe joint 652 and the second liquid storage tank 40 can be shortened, that is, the path of the second dental rinse solution flowing in the second connecting pipe 63 is shortened. In this way, the second dental rinse solution can flow to the front end of the first pump body 50 in a timely manner.

[0084] See also Figure 3 In some embodiments, in the height direction AA of the oral irrigator 1, the height of the second liquid storage tank 40 is higher than the height of the water inlet of the first pump body 50. In this way, when the second pump body 611 is not set on the second connecting tube 63, because the height of the water inlet of the first pump body 50 is lower than the height of the second liquid storage tank 40, the second oral irrigator in the second liquid storage tank 40 flows into the second connecting tube 63 under the action of gravity, and then the second oral irrigator flows to the front end of the first pump body 50 and mixes with the first oral irrigator.

[0085] Based on the fact that the oral irrigator 1 includes a controller, in some embodiments, the controller can be electrically connected to the first pump body 50 and the anti-backflow element 61. When the controller controls the first pump body 50 to work, the controller can control the anti-backflow element 61 to be turned on. When the controller controls the first pump body 50 to stop working, the controller can control the anti-backflow element 61 to be turned off. That is, when the first pump body 50 is working, the anti-backflow element 61 is turned on. When the first pump body 50 stops working, the anti-backflow element 61 is turned off. In this way, the backflow of the mixed liquid can be prevented.

[0086] See also Figure 9-10 In some embodiments, the second liquid storage tank 40 has an air inlet 40a. It can be understood that when the second pump body 611 needs to extract the second dental flushing solution in the second liquid storage tank 40, an air inlet 40a can be set in the second liquid storage tank 40, and the external air of the dental flosser 1 can enter the second liquid storage tank 40 through the air inlet 40a to avoid the situation where the second pump body 611 cannot extract the second dental flushing solution due to the formation of negative pressure inside the second liquid storage tank 40. However, the dental flosser 1 will be affected by the change of air pressure or the temperature difference between day and night, and the air in the second liquid storage tank 40 will expand and contract, thereby causing the second dental flushing solution in the second liquid storage tank 40.

[0087] In order to solve the problem of the second dental flushing liquid in the second liquid storage tank 40 leaking out from the air inlet 40a, further, an air inlet tube 41 can be provided at the air inlet 40a, and a waterproof breathable membrane 42 can also be provided. The air inlet tube 41 and the waterproof breathable membrane 42 can also be provided at the same time, which is not limited to the embodiment of the present application.

[0088] See also Fig. 9 For example, if an air inlet capillary 41 is provided at the air inlet 40a, when the water flosser 1 is affected by the air pressure or the temperature difference between day and night, causing the air in the second liquid storage tank 40 to expand and contract, since the air inlet capillary 41 is provided at the air inlet 40a, the expansion of the air in the second liquid storage tank 40 can squeeze the second water flossing liquid into the air inlet capillary 41, so that the second water flossing liquid is stored in the air inlet capillary 41, and the contraction of the air in the second liquid storage tank 40 can absorb the second water flossing liquid stored in the air inlet capillary 41 back into the second liquid storage tank 40. In this way, the second water flossing liquid can be prevented from leaking from the air inlet 40a into the installation space 20a of the casing 20.

[0089] See also Fig.10 For example, if a waterproof breathable membrane 42 is provided at the air inlet 40a, when the water flosser 1 is affected by the air pressure or the temperature difference between day and night, causing the air in the second liquid storage tank 40 to expand and contract, since the waterproof breathable membrane 42 is provided at the air inlet 40a, the expansion of the air in the second liquid storage tank 40 can squeeze the second water flossing liquid into the waterproof breathable membrane 42, so that the second water flossing liquid is stored in the waterproof breathable membrane 42, and the contraction of the air in the second liquid storage tank 40 can absorb the second water flossing liquid stored in the waterproof breathable membrane 42 back into the second liquid storage tank 40. In this way, not only the second water flossing liquid is prevented from leaking from the air inlet 40a into the installation space 20a of the casing 20, but also the external air of the water flosser 1 can enter the second liquid storage tank 40 through the waterproof breathable membrane 42.

[0090] 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.

[0091] 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 first liquid storage tank, used for storing a first dental flushing solution; The second liquid storage tank is used to store the second tooth flushing solution; a first pump body, at least used to pump the first dental flushing solution in the first liquid storage tank; as well as, an anti-backflow pipeline assembly, connected to the first liquid storage tank, the second liquid storage tank and the first pump body, and used for mixing the first dental rinse solution and the second dental rinse solution to form a mixed solution before being pumped out by the first pump body; Wherein, the anti-backflow pipeline assembly includes an anti-backflow element, and the anti-backflow element is used to prevent the mixed liquid from flowing back to the first liquid storage tank and / or the second liquid storage tank.

2. The oral rinser according to claim 1, characterized in that: The anti-backflow pipeline assembly also includes: A first connecting pipe, whose liquid inlet end is connected to the first liquid storage tank, and whose liquid outlet end is connected to the water inlet of the first pump body; and a second connecting pipe, whose liquid inlet end is connected to the second liquid storage tank, and whose liquid outlet end is connected to the water inlet of the first pump body; Wherein, the backflow prevention element is arranged on the first connecting pipe and / or the second connecting pipe.

3. The oral rinser according to claim 2, characterized in that: The anti-backflow pipeline assembly also includes: A manifold, the liquid outlet of which is connected to the water inlet of the first pump body; and A three-way element, comprising a first connecting pipe joint, a second connecting pipe joint and a confluence pipe joint, wherein the liquid outlet end of the first connecting pipe is connected to the first connecting pipe joint, the liquid outlet end of the second connecting pipe is connected to the second connecting pipe joint, and the liquid inlet end of the confluence pipe is connected to the confluence pipe joint, so that the first dental rinse solution and the second dental rinse solution are mixed in the three-way element and the confluence pipe; Wherein, the backflow prevention element is arranged on at least one of the first connecting pipe, the second connecting pipe and the confluence pipe.

4. The oral rinser according to claim 3, characterized in that: The three-way element includes a three-way pipe, and the anti-backflow element is arranged on the manifold; or, The three-way element includes a three-way pipe, and the two anti-backflow elements are respectively arranged on the first connecting pipe and the second connecting pipe; or, The three-way element includes a three-way valve. The backflow prevention element is arranged on one of the first connecting pipe and the second connecting pipe. The three-way valve is used as the backflow prevention element of the other one of the first connecting pipe and the second connecting pipe.

5. The oral rinser according to claim 3, characterized in that: The backflow prevention element comprises: A manifold one-way valve, arranged on the manifold; Among them, when the first pump body is working, the manifold one-way valve is subjected to the positive pressure of the first pump body to make the manifold one-way valve conductive; when the first pump body stops working, the manifold one-way valve is subjected to the negative pressure or zero pressure difference of the first pump body to close the manifold one-way valve.

6. The oral rinser according to claim 3, characterized in that: The manifold comprises: The expansion section has a flow cross-section that gradually increases along the flow direction of the mixed liquid flowing toward the first pump body.

7. The oral rinser according to claim 3, characterized in that: The length of the manifold is shorter than that of the first connecting pipe, so that the three-way element is located in the downstream section of the main pipeline formed by the first connecting pipe and the manifold.

8. The oral rinser according to claim 3, characterized in that: The three-way element comprises a three-way pipeline, and the first pump body comprises: The pump housing comprises two covers covering each other, the three-way pipe is arranged at the covering position of the two covers to be clamped and fixed by the two covers; and The pump body is arranged in the pump casing.

9. The oral rinser according to claim 3, characterized in that: The backflow prevention element comprises: The second pump body is arranged on the second connecting pipe, and is used for extracting the second dental flushing liquid in the second liquid storage tank and preventing the mixed liquid from flowing back to the second liquid storage tank.

10. The oral rinser according to claim 9, characterized in that: The dental flosser also includes: a detection element, disposed in the second liquid storage tank to detect the remaining amount of the second dental flushing solution in the second liquid storage tank, or disposed on the second connecting tube to detect the flow rate of the second dental flushing solution in the second connecting tube; and, The controller is electrically connected to the detection element and the second pump body, and is used to control the second pump body to close when the surplus is lower than the set surplus or the flow rate is lower than the set flow rate.

11. The oral rinser according to claim 9, characterized in that: The second connecting pipe joint extends toward the second pump body, and / or a pipe joint provided with the second pump body extends toward the second connecting pipe joint.

12. The oral rinser according to claim 9, characterized in that: The second pump body and the first pump body are arranged on the same side of one of the mid-section planes of the oral irrigator which is parallel to the height direction of the oral irrigator.

13. The oral rinser according to claim 9, characterized in that: The connecting pipe between the second pump body and the second liquid storage tank is a hose, the second connecting pipe includes the hose, and the diameter of the hose is not less than 1 mm and not more than 5 mm.

14. The oral rinser according to claim 9, characterized in that: The second pump body is a positive displacement pump body, and the positive displacement pump body includes at least one of a diaphragm pump, a plunger pump, and a peristaltic pump.

15. The oral rinser according to claim 3, characterized in that: The backflow prevention element comprises: A second connecting pipe one-way valve, arranged on the second connecting pipe; Among them, when the first pump body is working, the second connecting pipe one-way valve is subjected to the positive pressure of the first pump body to make the second connecting pipe one-way valve conductive; when the first pump body stops working, the second connecting pipe one-way valve is subjected to the negative pressure or zero pressure difference of the first pump body to close the second connecting pipe one-way valve.

16. The oral rinser according to claim 15, characterized in that: The second liquid storage tank is opposite to the first pump body and is spaced apart from each other, the second connecting pipe joint extends toward the second liquid storage tank, and / or the pipe joint of the second liquid storage tank extends toward the first pump body.

17. The oral rinser according to claim 15, characterized in that: In the height direction of the oral irrigator, the height of the second liquid storage tank is higher than the height of the water inlet of the first pump body.

18. The oral rinser according to claim 1, characterized in that: The dental flosser also includes: The controller is electrically connected to the first pump body and the anti-backflow element, wherein the controller controls the anti-backflow element to be turned on while controlling the first pump body to work, and the controller controls the anti-backflow element to be turned off while controlling the first pump body to stop working.

19. The oral rinser according to any one of claims 1 to 18, characterized in that: The anti-backflow element includes at least one of a positive displacement pump body, a one-way valve and a solenoid valve.

20. The oral rinser according to any one of claims 1 to 18, characterized in that: The second liquid storage tank has an air inlet, and the air inlet is provided with an air inlet tube and / or a waterproof breathable membrane.

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