Liquid electromagnetic heating device and dental flosser

Abstract

The present invention relates to a liquid electromagnetic heating device and a water flosser. The liquid electromagnetic heating device comprises a first shell, a second shell, an electromagnetic heating component and a sealing connector. The first shell and the second shell are combined to form a closed heating channel for transporting liquid by utilizing the pressure difference at both ends. The electromagnetic heating component comprises a metal rod and an inductor coil. The metal rod is arranged in the heating channel. The present invention utilizes the inductor coil to generate an alternating magnetic field to cause the metal rod to generate eddy currents and generate heat, thereby directly heating the liquid flowing in the heating channel to achieve instant heating. The sealing connector is respectively combined with the first shell and the second shell to form a closed cavity. The heating channel and the electromagnetic heating component are both located in the cavity, which can prevent water vapor or water droplets outside the liquid electromagnetic heating device from entering the electromagnetic heating component and other electrical structures, thereby causing the problem of electric shock hazard, thereby effectively improving safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to a liquid electromagnetic heating device and a water flosser. Background Art

[0002] Products that use heaters, such as water dispensers, bathroom water heaters, and faucets, all have requirements for instantaneous heating and waterproofing. However, most of the current instant liquid heating devices use thin film heating, thick film heating, PTC and other technologies to achieve liquid heating, and the temperature response speed is slow.

[0003] The water flosser is an auxiliary tool for cleaning the oral cavity. It flushes the teeth and the gaps between teeth by generating a pulsed water flow under a certain pressure. Its excellent cleaning effect has been widely recognized by the public. The water flosser uses the impact force carried by the high-speed water column to remove food debris stuck in the gaps between teeth, so as to avoid the foreign body sensation caused by food debris stuck in the gaps between teeth, causing discomfort. The long-term residue of food debris is easy to breed bacteria in the oral cavity and cause dental plaque. The long-term accumulation of dental plaque is easy to calcify and form dental calculus to accumulate at the root of the tooth, compressing and stimulating the periodontal environment, causing periodontal atrophy. For users with more sensitive teeth or gums, not only does the pressure of the pulsed water flow need to be adjusted in a targeted manner, but the lower water temperature is easy to cause discomfort to the user, and the additional preparation of warm water greatly reduces the convenience of use and affects the user experience. In the prior art, there is a design in which a liquid heater is set inside the water flosser to heat the liquid immediately to increase the temperature of the generated pulsed water flow to avoid causing discomfort to the user.

[0004] In response to the demand for instant heating of the above household appliances, most of the liquid heaters on the market currently belong to Class I appliances in the household appliance safety standards, that is, additional grounding protection is provided through the power cord under basic insulation. However, for household appliances such as water flossers, since they need to meet the portable design, they are generally rechargeable structures, and since they need to be equipped with water storage structures and liquid channels inside, and are generally used in water-related environments, in order to ensure safety, they require higher safety requirements, Class II appliances, that is, reinforced insulation or double insulation without grounding protection. However, most of the existing liquid heaters cannot meet the insulation requirements of Class II appliances. When heated without water under abnormal conditions, they are prone to dry burning, and the seal fails, that is, after the basic insulation fails, water flows into the electromagnetic coil, causing the risk of electric shock. The heating efficiency of a small number of heaters that meet the requirements of Class II appliances is low and cannot meet the needs of instantaneous heating. Summary of the invention

[0005] Based on this, an object of the present invention is to provide a liquid electromagnetic heating device, which has the advantages of simple structure, high heating efficiency and high safety performance.

[0006] A liquid electromagnetic heating device, comprising a first shell, a second shell, an electromagnetic heating component and a sealing connector; the first shell is fixed to the second shell, and encloses to form a closed heating channel for transporting liquid by using the pressure difference at both ends; the electromagnetic heating component comprises a metal rod and an inductor coil, the metal rod is arranged in the heating channel; the inductor coil is sleeved on the outside of the heating channel; the inductor coil is electrically connected to an alternating frequency power supply and can generate an alternating magnetic field, the metal rod is in the alternating magnetic field and generates eddy currents to generate heat; the sealing connector is fixed to the first shell and the second shell respectively, and encloses to form a closed cavity, the heating channel and the electromagnetic heating component are both located in the cavity.

[0007] The liquid electromagnetic heating device described in the embodiment of the present invention adopts electromagnetic heating technology, directly arranges a metal rod in the heating channel, and uses the arrangement of the inductance coil to generate an alternating magnetic field, so that the metal rod generates eddy currents in the alternating magnetic field and generates heat, thereby directly heating the liquid flowing in the heating channel. The heating efficiency is high and can meet the needs of instant heating. In addition, through the arrangement of the sealing connector, it is fixed with the first shell and the second shell to form a closed cavity, and the heating channel and the electromagnetic heating component are both located in the cavity, which can prevent water vapor or water droplets outside the liquid electromagnetic heating device from entering the electromagnetic heating component and other electrical structures, thereby causing the risk of electric shock, thereby effectively improving the safety performance and meeting the needs of use in water-related environments.

[0008] Furthermore, it also includes a fuse; the fuse is arranged in the first shell, and its two sides are respectively connected to the heating channel and the outside world; the metal rod abuts against the inner side of the fuse, and when the metal rod is in a dry-burning state, it melts through the fuse and connects the heating channel to the outside world. Through the setting of the fuse, the high temperature generated by the metal rod during abnormal dry-burning can melt it, and connect the heating channel to the outside world, resulting in the inability to generate a pressure difference for conveying liquid due to air leakage, and the liquid cannot flow normally, effectively preventing the accidental outflow of liquid with excessively high temperature and causing harm to the user, etc., with high safety performance and simple structure, which is conducive to reducing production and processing costs.

[0009] Furthermore, the heating channel includes a water inlet section, a heating section and a water outlet section in sequence along the liquid flow direction; the first shell includes a fixed part and a shell body, and the water inlet section is opened through the fixed part; the shell body is a hollow cylindrical structure, and its inner hole is the heating section, and the inductor coil is sleeved outside the shell body; one end of the shell body is fixedly connected to the fixed part, and the other end is movably clamped in the second shell; the water outlet section is opened through the second shell. The above arrangement makes the structure simple, helps to reduce the occupied space, and adapts to the development trend of portability of household appliances.

[0010] Furthermore, the metal rod includes a metal rod body and a first assembly end and a second assembly end fixed at both ends of the metal rod body; the water inlet section is an L-shaped structure, which includes a first water inlet section and a second water inlet section along the liquid flow direction, the inner diameter of the second water inlet section matches the outer diameter of the first assembly end, the first assembly end is penetrated through the second water inlet section and abuts against the side wall of the first water inlet section; the second assembly end is movably clamped in the water outlet section; the fuse and the first shell are an integral plastic part, and the fuse is the area where the side wall of the first water inlet section contacts the first assembly end. This arrangement facilitates processing and production and helps to reduce costs.

[0011] Furthermore, the electromagnetic heating assembly further comprises an elastic member; the inner diameter of the end of the water outlet section gradually decreases from one end connected to the heating section to the other end, the second assembly end is inserted into the water outlet section, the elastic member is sleeved on the second end, it is in a compressed state, and the two ends are respectively in contact with the side wall of the water outlet section and the main body of the metal rod. The setting of the elastic member can ensure the contact between the first assembly end and the fuse, so that the fuse can be melted when the metal rod is abnormally dry-burned.

[0012] Furthermore, an insulating heat-conducting protection tube is included, and the insulating heat-conducting protection tube is sleeved between the heating channel and the inductor coil. The insulating heat-conducting protection tube is used to protect the inductor coil. When the metal rod is abnormally dry-burned, excessive heat is generated, which causes the shell body to accidentally fuse. The insulating heat-conducting protection tube can prevent the hot water in the heating section of the heating channel from directly contacting the inductor coil and causing electric shock safety accidents, further improving the safety performance of the device.

[0013] Furthermore, it also includes a temperature control element, which is arranged on the outer surface of the insulating thermally conductive protective tube; the temperature control element detects the temperature of the insulating thermally conductive protective tube and controls the closing or opening of the circuit between the inductor coil and the AC-frequency power supply; the temperature control element is preset with a temperature threshold and compares the measured temperature with the temperature threshold. When the measured temperature is greater than the temperature threshold, the circuit between the inductor coil and the AC-frequency power supply is disconnected, and when the measured temperature is not greater than the temperature threshold, the circuit between the inductor coil and the AC-frequency power supply is closed. The temperature control element can detect the temperature of the insulating thermally conductive protective tube, and can automatically identify temperature anomalies and cut off the circuit between the inductor coil and the AC-frequency power supply, stop heating the metal rod, and avoid the situation where the first shell is burned through due to the excessive temperature of the metal rod, thereby further improving the safety performance of the device.

[0014] Furthermore, the sealing connector is a potting glue shell, and the cavity is filled with potting glue. The potting glue can play a role in strengthening insulation, effectively preventing the battery coil from directly contacting the liquid in the heating channel or outside the device, and further improving safety performance.

[0015] Furthermore, it also includes a waterproof component; the glue-filling shell is a hollow cylindrical structure, the second shell is engaged and penetrated in the glue-filling shell, and the waterproof component is arranged between the second shell and the glue-filling shell to play a sealing and waterproof role.

[0016] In addition, an embodiment of the present invention further provides a water flosser, which includes the liquid electromagnetic heating device described above.

[0017] The water flosser described in the embodiment of the present invention has an instant heating function, and has a fast heating response speed and high heating efficiency. It can quickly generate warm pulse water flow for oral cleaning, which can reduce irritation to the oral cavity and improve the user experience. The liquid electromagnetic heating device has strong insulation and high safety performance, and meets the requirements of Class II household appliances.

[0018] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural stereogram of the liquid electromagnetic heating device described in Example 1 of the present invention;

[0020] Figure 2 This is a front view of the structure of the liquid electromagnetic heating device described in Example 1 of the present invention;

[0021] Figure 3 It is a longitudinal sectional schematic diagram of the structure direction of the liquid electromagnetic heating device described in Example 1 of the present invention;

[0022] Figure 4 It is a schematic longitudinal section diagram of the structure direction 2 of the liquid electromagnetic heating device according to Example 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the explosion structure of the liquid electromagnetic heating device according to Example 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the first shell structure of Example 1 of the present invention;

[0025] Figure 7 This is a schematic structural diagram of the inductor coil and the first shell described in Example 1 of the present invention;

[0026] Figure 8 This is a schematic structural diagram of the inductor coil, the first shell and the second shell according to Embodiment 1 of the present invention;

[0027] Fig. 9 This is a schematic structural diagram of the insulating thermally conductive protection tube and the temperature control element described in Example 1 of the present invention;

[0028] Fig.10 This is a schematic diagram of pouring the potting glue described in Example 1 of the present invention. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] Example 1

[0031] Embodiment 1 of the present invention provides a liquid electromagnetic heating device, which is suitable for the field of household appliances. Applicable products include instant hot water irrigators, instant hot water (or beverage) machines, instant hot bathroom heaters, instant hot water faucets, etc. It has the advantages of simple structure, high heating efficiency and high safety performance.

[0032] Please refer to Figure 1-5 , Figure 1 This is a structural stereogram of the liquid electromagnetic heating device described in Example 1 of the present invention. Figure 2 This is a front view of the structure of the liquid electromagnetic heating device described in Example 1 of the present invention. Figure 3 This is a longitudinal sectional view of the structure of the liquid electromagnetic heating device according to Example 1 of the present invention. Figure 4 This is a schematic longitudinal section view of the structure of the liquid electromagnetic heating device according to Example 1 of the present invention in the second direction. Figure 5 This is an exploded schematic diagram of the structure of the liquid electromagnetic heating device described in Example 1 of the present invention. As shown in the figure, the liquid electromagnetic heating device includes a first shell 10, a second shell 20, an electromagnetic heating component and a sealing connector 80. The first shell 10 and the second shell 20 are detachably fixed, and enclose a closed heating channel 40 that transports liquid by using the pressure difference at both ends; the electromagnetic heating component includes a metal rod 31 and an inductor 33, and the metal rod 31 is arranged in the heating channel 40; the inductor 33 is spirally sleeved on the outside of the heating channel 40; the inductor 33 is electrically connected to the alternating frequency power supply and can generate an alternating magnetic field, the metal rod 31 is in the alternating magnetic field and generates eddy currents to generate heat; the sealing connector 80 is detachably fixed to the first shell 10 and the second shell 20 respectively, and encloses a closed cavity, and the heating channel 40 and the electromagnetic heating component are both located in the cavity.

[0033] The liquid electromagnetic heating device described in Example 1 of the present invention adopts electromagnetic heating technology, directly arranges a metal rod in the heating channel, and uses the arrangement of the inductance coil to generate an alternating magnetic field, so that the metal rod generates eddy currents in the alternating magnetic field and generates heat, thereby directly heating the liquid flowing in the heating channel. The heating efficiency is high and can meet the needs of instant heating. In addition, through the arrangement of the sealing connector, it is detachably fixed with the first shell and the second shell to form a closed cavity, and the heating channel and the electromagnetic heating component are both located in the cavity, which can prevent water vapor or water droplets outside the liquid electromagnetic heating device from entering the electromagnetic heating component and other electrical structures, thereby causing the risk of electric shock, thereby effectively improving the safety performance and meeting the needs of use in water-related environments.

[0034] As an optional embodiment, the liquid electromagnetic heating device further includes a fuse, which is arranged in the first shell 10, and its two sides are respectively connected to the heating channel 40 and the outside world; the metal rod 31 abuts against the inner side of the fuse, and when the metal rod 31 is in a dry-burning state, it melts through the fuse and connects the heating channel to the outside world. Through the setting of the fuse, the high temperature generated by the metal rod 31 during abnormal dry-burning can melt it, and connect the heating channel 40 to the outside world, resulting in the inability to generate a pressure difference for conveying liquid due to air leakage, and the liquid cannot flow normally, effectively preventing the excessively high temperature liquid from accidentally flowing out along the heating channel 40 and causing harm to the user, etc., with high safety performance and simple structure, which is conducive to reducing production and processing costs.

[0035] Specifically, the cross-section of the heating channel 40 is circular, and the metal rod 31 is a cylindrical structure, which is arranged in the heating channel 40 along the extension direction of the heating channel 40, so that the metal rod 31 can evenly heat the liquid flowing through the heating channel 40 and is easy to process and shape.

[0036] The heating channel 40 includes a water inlet section 41, a heating section 42 and a water outlet section 43 in sequence along the liquid flow direction. Figure 6 , Figure 6 This is a schematic diagram of the first shell structure of Example 1 of the present invention. As shown in the figure, the first shell 10 includes a shell body 11 and a fixing portion 12. The shell body 11 is a hollow cylindrical structure, and its inner hole is a heating section 42. The inductor 33 is sleeved outside the shell body 11. For details, please refer to Figure 7-8 , Figure 7 is a schematic structural diagram of the inductor coil and the first shell according to Embodiment 1 of the present invention, Figure 8 The schematic diagram of the structure of the inductor, the first shell and the second shell described in Example 1 of the present invention, as shown in the figure, the inductor 33 is fixedly sleeved on the outside of the shell body 11 using a fixed structure, the fixed structure can be a belt, a rope or a fixing device or an article, etc. In this embodiment, it is a fixing belt 34, the number of which is 1, and in other embodiments, it can be multiple, to ensure the stability of the fixation. The fixing part 12 is fixedly connected to one end of the shell body 11, and the water inlet section 41 is opened through the fixing part 12; the surface of the second shell 20 is provided with an annular groove matching the shell body 11 (not shown in the figure), the water outlet section 43 is opened through the second shell 20, and its opening is located in the annular groove, and the end of the shell body 11 is clamped in the annular groove. The setting of the annular groove is used to realize the clamping between the first shell 10 and the second shell 20, and the structure is simple.

[0037] The metal rod 31 includes a metal rod body 311 and a first assembly end 312 and a second assembly end 313 fixed at both ends of the metal rod body 311; further preferably, the metal rod body 311, the first assembly end 312 and the second assembly end 313 are all cylindrical structures, and the outer diameters of the first assembly end 312 and the second assembly end 313 are smaller than the outer diameter of the metal rod body 311; the cylindrical structure of the metal rod body 311, the first assembly end 312 and the second assembly end 313 is convenient for processing and forming, and convenient for assembly operations, and can also effectively improve the uniformity of heating the liquid flowing in the heating channel.

[0038] Specifically, the metal rod 31 is a steel part, which is preferably a stainless steel part with a high iron content and a surface anti-rust treatment such as chrome plating, nickel plating or Teflon treatment. Specifically, stainless steels of grades such as SUS420, SUS430, and SUS431 can be selected. The inductor 33 is electrically connected to a high-frequency and high-voltage alternating-frequency power supply. There is an alternating-frequency current on the wire of the inductor 33. Due to the magnetic effect of the current, a high-speed alternating electromagnetic field is generated near the inductor 33; the metal rod 31 is in the alternating electromagnetic field, and the stainless steel part with a high iron content has good magnetic conductivity. In the high-speed alternating electromagnetic field, the outer surface of the metal rod 31 cuts the alternating magnetic field lines, and an induced alternating current, that is, an alternating eddy current, is generated inside. Eddy currents cause the carriers inside the metal rod 31 to move irregularly, and the carriers collide and rub against each other to generate heat, thereby heating the metal rod 31. The liquid in the heating channel 40 flows through the surface of the metal rod 31, and the purpose of heating the liquid is achieved after heat exchange. Since the alternating electromagnetic field generated by the inductor 33 changes at a high speed, the metal rod 31 heats up quickly, with high heating efficiency, which can meet the needs of instant heating.

[0039] The water inlet section 41 is an L-shaped structure, which includes a first water inlet section 411 and a second water inlet section 412 along the liquid flow direction. The inner diameter of the second water inlet section 412 matches the outer diameter of the second assembly end 313. The first assembly end 312 is penetrated by the second water inlet section 412 and abuts against the side wall of the first water inlet section 411. The fuse and the first shell 10 are an integral plastic part. The fuse is the area where the side wall of the first water inlet section 411 contacts the first assembly end 312. This arrangement facilitates processing and production and helps to reduce costs.

[0040] Furthermore, the electromagnetic heating component also includes an elastic member 32; the inner diameter of the end of the water outlet section 43 gradually decreases from one end connected to the heating section 42 to the other end, the second assembly end 313 is penetrated by the water outlet section 43, and the elastic member 32 is sleeved on the second assembly end 313, which is in a compressed state, and the two ends are respectively abutted against the side wall of the water outlet section 43 and the body of the metal rod 31.

[0041] As an optional implementation, in this embodiment, the liquid electromagnetic heating device further includes an insulating heat-conducting protection tube 50 and a temperature control element 60 .

[0042] Please refer to Fig. 9 , Fig. 9This is a schematic diagram of the structure of the insulating thermally conductive protective tube and the temperature control element described in Example 1 of the present invention. The insulating thermally conductive protective tube 50 is sleeved between the heating channel 40 and the inductor 33. The insulating thermally conductive protective tube 50 is used to protect the inductor 33. When the metal rod 31 is abnormally dry-burned, excessive heat is generated, which causes the shell body 11 to accidentally melt. The insulating thermally conductive protective tube 50 can prevent the hot water in the heating section 42 of the heating channel 40 from directly contacting the inductor 33 and causing electric shock safety accidents, further improving the safety performance of the device. Further preferably, the insulating thermally conductive protective tube 50 is made of quartz glass, which is an excellent electrical insulating material, has good insulation performance even at high temperatures, and has high mechanical properties; a buffer glue 52 is provided between the insulating thermally conductive protective tube 50 and the second shell 20, which is a soft glue and plays a buffering role, and can prevent the insulating thermally conductive protective tube 50 made of quartz glass from being impacted and broken.

[0043] The temperature control element 60 is arranged on the outer surface of the insulating thermally conductive protective tube 50; the temperature control element 60 detects the temperature of the insulating thermally conductive protective tube 50 and controls the closing or disconnection of the circuit between the inductor 33 and the AC-frequency power supply; the temperature control element 60 is preset with a temperature threshold and compares the measured temperature with the temperature threshold. When the measured temperature is greater than the temperature threshold, the circuit between the inductor 33 and the AC-frequency power supply is disconnected, and when the measured temperature is not greater than the temperature threshold, the circuit between the inductor 33 and the AC-frequency power supply is closed. The temperature control element 60 can detect the temperature of the insulating thermally conductive protective tube 50, and can automatically identify temperature anomalies and cut off the circuit between the inductor 33 and the AC-frequency power supply, stop heating the metal rod 31, and avoid the situation where the first shell 10 is burned through due to the excessive temperature of the metal rod 31, further improving the safety performance of the device.

[0044] As an optional implementation, in this embodiment, the sealing connector 80 is a potting rubber shell, and the cavity is filled with potting rubber 82; the liquid electromagnetic heating device also includes a waterproof ring 90. Specifically, the fixing portion 12 of the first shell 10 is detachably fixed to the potting rubber shell 80 by fixing screws 13, and the fixing stability is good and the disassembly and assembly are convenient. The potting rubber 82 can play a role in strengthening insulation, effectively preventing the battery coil from directly contacting the liquid in the heating channel or outside the device, and further improving the safety performance. In addition, the potting rubber 82 can also absorb the heat generated by the inductor coil 33, and play a certain role in heat dissipation. The potting rubber shell 80 is a hollow cylindrical structure, and the second shell 20 is engaged and penetrated in the potting rubber shell 80. The waterproof ring 90 is arranged between the second shell 20 and the potting rubber shell 80 to play a sealing and waterproof role.

[0045] For further information, please refer to Fig.10 , Fig.10Schematic diagram of potting glue pouring in Example 1 of the present invention. A potting glue port 83 is provided at the joint of the potting glue shell 80 and the first shell 10. During potting, the liquid electromagnetic heating device is inverted as a whole, and the potting glue 82 is poured into the cavity from the potting glue port 83. Fig.10 As shown by the middle arrow X, the liquid level is at least 2 mm higher than the inductor 33 and other electrical parts.

[0046] Furthermore, in an implementation of an embodiment of the present invention, the inductor 33 is an enameled wire, the temperature control element 60 is electrically connected to the control circuit through a first wire 71, and the control circuit is used to control the turning on or off of the AC power supply. The inductor 33 is electrically connected to the AC power supply through a second wire 72, and the first wire 71 and the second wire 72 are both double-insulated wires, each of which has two cores. The first wire 71 or the second wire 72 is respectively welded to both ends of the temperature control element 60 or the inductor 33 and then wrapped with insulating material. The welding position is immersed in the potting glue, and the distance from the liquid surface of the potting glue is at least 2 mm to ensure the insulation effect.

[0047] The liquid electromagnetic heating device described in Example 1 of the present invention adopts electromagnetic heating technology, directly arranges a metal rod in the heating channel, and uses the setting of the inductance coil to generate an alternating magnetic field, so that the metal rod generates eddy currents in the alternating magnetic field and generates heat, thereby directly heating the liquid flowing in the heating channel. The heating efficiency is high and can meet the needs of instant heating. In the preferred embodiment, the structure of the metal rod, the first shell and the second shell is further preferably limited. Through the setting of the fuse, the high temperature generated by the metal rod during abnormal dry burning can melt it, and the heating channel can be connected to the outside world. , resulting in the inability to generate a pressure difference for conveying liquid due to air leakage, and the liquid cannot flow normally, effectively preventing the liquid with too high temperature from accidentally flowing out and causing harm to the user; in addition, in a preferred embodiment, the insulating thermal conductive protection tube is used to effectively prevent the liquid in the heating channel from directly contacting the inductor coil during the accidental damage of the first shell and causing an electric shock safety accident, and further combined with the setting of the potting rubber shell, by pouring potting rubber, the liquid in the heating channel and the liquid outside the device are further prevented from entering the electrical area, effectively improving the safety performance, and the structure is simple, which is conducive to reducing production and processing costs.

[0048] Example 2

[0049] Embodiment 2 of the present invention further provides a water flosser, which includes the liquid electromagnetic heating device described in Embodiment 1.

[0050] The water flosser described in Example 2 of the present invention has an instant heating function, and has a fast heating response speed and high heating efficiency. It can quickly generate warm pulse water flow for oral cleaning, which can reduce irritation to the oral cavity and improve the user experience. The liquid electromagnetic heating device has strong insulation and high safety performance, and meets the requirements of Class II household appliances.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A dental flosser, characterized in that: The invention comprises a liquid electromagnetic heating device, which comprises a first shell, a second shell, an electromagnetic heating component, a sealing connector and an insulating heat-conducting protection tube; the first shell is fixed to the second shell, and encloses to form a closed heating channel for transporting liquid by using the pressure difference at both ends; the electromagnetic heating component comprises a metal rod and an inductor coil, the metal rod is arranged in the heating channel; the inductor coil is sleeved on the outside of the heating channel; the inductor coil is electrically connected to an alternating-frequency power supply and can generate an alternating magnetic field, the metal rod is in the alternating magnetic field and generates eddy currents to generate heat; the sealing connector is fixed to the first shell and the second shell respectively, and encloses to form a closed cavity, the heating channel and the electromagnetic heating component are both located in the cavity; The sealing connector is a glue-filled shell, and the cavity is filled with a potting glue; The insulating heat-conducting protection tube is sleeved between the heating channel and the inductor coil.

2. The oral rinser according to claim 1, characterized in that: It also includes a fuse; the fuse is arranged in the first shell, and its two sides are respectively connected to the heating channel and the outside world; the metal rod abuts against the inner side of the fuse, and when the metal rod is in a dry-burning state, it melts through the fuse and connects the heating channel with the outside world.

3. The oral rinser according to claim 2, characterized in that: The heating channel includes a water inlet section, a heating section and a water outlet section in sequence along the liquid flow direction; the first shell includes a fixed part and a shell body, and the water inlet section is opened through the fixed part; the shell body is a hollow cylindrical structure, and its inner hole is the heating section, and the inductor coil is sleeved outside the shell body; one end of the shell body is fixedly connected to the fixed part, and the other end is movably clamped in the second shell; the water outlet section is opened through the second shell.

4. The oral rinser according to claim 3, characterized in that: The metal rod comprises a metal rod body and a first assembly end and a second assembly end fixed at both ends of the metal rod body; the water inlet section is an L-shaped structure, which comprises a first water inlet section and a second water inlet section along the liquid flow direction, the inner diameter of the second water inlet section matches the outer diameter of the first assembly end, the first assembly end is penetrated through the second water inlet section and abuts against the side wall of the first water inlet section; the second assembly end is movably clamped in the water outlet section; the fuse and the first shell are an integral plastic part, and the fuse is the area where the side wall of the first water inlet section contacts the first assembly end.

5. The oral rinser according to claim 4, characterized in that: The electromagnetic heating component also includes an elastic member; the inner diameter of the end of the water outlet section gradually decreases from one end connected to the heating section to the other end, the second assembly end is penetrated through the water outlet section, and the elastic member is sleeved on the second assembly end, which is in a compressed state, and the two ends are respectively abutted against the side wall of the water outlet section and the metal rod body.

6. The oral rinser according to claim 1, characterized in that: It also includes a temperature control element, which is arranged on the outer surface of the insulating thermally conductive protective tube; the temperature control element detects the temperature of the insulating thermally conductive protective tube and controls the closing or opening of the circuit between the inductor coil and the AC-frequency power supply; the temperature control element is preset with a temperature threshold and compares the measured temperature with the temperature threshold. When the measured temperature is greater than the temperature threshold, the circuit between the inductor coil and the AC-frequency power supply is opened, and when the measured temperature is not greater than the temperature threshold, the circuit between the inductor coil and the AC-frequency power supply is closed.

7. The oral rinser according to claim 1, characterized in that: It also includes a waterproof component; the glue-filling shell is a hollow cylindrical structure, the second shell is engaged and penetrated in the glue-filling shell, and the waterproof component is arranged between the second shell and the glue-filling shell.

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