A portable dental cleaning device

Abstract

This utility model relates to the field of dental cleaning device technology, specifically a portable dental cleaning device. The device includes a main unit and a handle. The main unit comprises a casing, a water tank, and a powder container. The casing houses a water pump and a main air pump. The inlet of the main air pump is equipped with a silencer, and its outlet is sequentially connected to an air handling unit and a valve assembly. The air handling unit includes a gas filter and a gas dryer. One outlet of the valve assembly is connected to air path A via a first one-way valve, and the other outlet is connected to air path B via a second one-way valve. The powder container is located on air path A and can be flushed out of the powder container by compressed air from air path A, allowing it to flow forward along air path A. The ends of air paths A and B merge and are then connected to the handle via an air pipe. The inlet of the water pump is connected to the water tank, and its outlet is connected to the handle via a water pipe. The portable dental cleaning device provided in this application has an automatic cleaning function, can purify and dry the air, has good noise reduction, and is suitable for miniaturized home use.

Description

Technical Field

[0001] This utility model relates to the field of dental cleaning devices, specifically a portable dental cleaning device. Background Technology

[0002] Dental air polishing is an air polishing technology that uses compressed gas (usually air) to lift abrasive powder, which is then sprayed onto the tooth surface through a nozzle on the handle. The powder mixes with a liquid medium (usually water) sprayed along with the abrasive powder, effectively cleaning the tooth surface. Specifically, it can remove plaque, soft deposits, tobacco stains, and tea stains, effectively preventing periodontal disease and maintaining dental health. However, existing air polishing devices lack automatic cleaning functions. After the cleaning operation, abrasive powder can easily remain in the tubing and handle, causing blockages over time. Furthermore, in humid environments or environments containing many impurities, abrasive powder can easily clump together, causing blockages or contamination in the powder container, tubing, and handle. Additionally, the device is quite noisy during operation. These issues affect the lifespan of the cleaning device and the user experience. Utility Model Content

[0003] In order to overcome the defects in the existing technology, the purpose of this utility model is to provide a portable teeth cleaning device with automatic cleaning, air purification and drying functions and good quietness.

[0004] The objective of this utility model is achieved through the following technical solutions:

[0005] A portable dental cleaning device includes a main unit and a handle. The main unit includes a chassis, a water tank and a powder container installed in the chassis. The handle includes a handle housing and a nozzle located at the front end of the handle housing. The nozzle has a liquid spray port and a sand spray port. The chassis contains a water pump and a main air pump. The inlet of the main air pump is equipped with a silencer, and the outlet is connected in sequence to an air handling unit and a valve assembly. The air handling unit includes a gas filter and a gas dryer. One outlet of the valve assembly is connected to air path A through a first one-way valve, and the other outlet is connected to air path B through a second one-way valve. The powder container is located on air path A and can be flushed out of the powder container by the compressed air in air path A and flow forward along air path A. The ends of air path A and air path B merge and are connected to the handle and the sand spray port through an air pipe. The inlet of the water pump is connected to the water tank, and the outlet is connected to the handle and the liquid spray port through a water pipe.

[0006] As a preferred technical solution, the nozzle is also provided with a visualization mechanism, which includes a protective cover set on the nozzle and open at the front end, a camera and light assembly set inside the protective cover, an air jet hole set on the side wall of the protective cover and located in front of the camera and light assembly, and a pipe connecting the air jet hole, the pipe being connected to the main air pump or an auxiliary air pump built into the handle housing.

[0007] As a preferred technical solution, the handle is provided with a nozzle angle adjustment mechanism, including an angle adjustment key movably disposed on the handle housing and a transmission mechanism disposed inside the handle housing. The nozzle is hinged to the handle housing, and the angle adjustment key is connected to the nozzle through the transmission mechanism. The angle adjustment key can move relative to the handle housing, thereby driving the nozzle to swing relative to the handle housing through the transmission mechanism to adjust the nozzle orientation angle.

[0008] As a preferred technical solution, the side of the chassis is provided with a first mounting groove for installing the water tank. The side wall of the water tank and the chassis are provided with a water tank connector and a chassis connector that cooperate with each other. The chassis connector is connected to the inlet of the water pump through a pipeline. When the water tank is inserted into the first mounting groove, the water tank connector and the chassis connector can be connected. The water tank connector is located on the upper part of the side wall of the water tank. The inner side wall of the water tank is also provided with a water suction channel. The upper end of the water suction channel is connected to the water tank connector, and the lower end extends to the bottom of the water tank.

[0009] As a preferred technical solution, the ends of air path A and air path B are joined together through a first tee connector. The main air pump is a dual-head air pump. The two inlets of the dual-head air pump are joined together through a second tee connector and then connected to the silencer. The two outlets of the dual-head air pump are joined together through a third tee connector and then connected to the air handling unit. The top of the chassis is provided with a second mounting slot with an upward opening for installing the powder hopper. The air handling unit is vertically installed inside the chassis between the first and second mounting slots. The dual-head air pump, silencer, water pump, and valve assembly are horizontally installed inside the chassis below the first and second mounting slots.

[0010] As a preferred technical solution, the chassis is also equipped with a main control board, which is connected to the main air pump, water pump, and valve group. The valve group is a solenoid valve. The handle and / or the chassis are equipped with control buttons connected to the main control board, and the working status of the dual-head air pump, water pump, and valve group can be controlled through the control buttons.

[0011] As a preferred technical solution, the water pipe includes an external water pipe section connected to the handle and an internal water pipe section connected to the water pump. The air pipe includes an external air pipe section connected to the handle and an internal air pipe section connected to the first tee connector. The ends of the external water pipe section and the external air pipe section are provided with handle connectors. The ends of the internal water pipe section and the internal air pipe section are provided with chassis interfaces that mate with the handle connectors. The chassis interfaces are located on the outer wall of the chassis.

[0012] As a preferred technical solution, the top surface of the water tank is provided with a cover, the top surface of the cover is provided with a guide groove, and the first mounting groove is provided with a guide strip that matches the guide groove. The guide groove and the guide strip are mutually cooperating isosceles trapezoidal structures or isosceles triangular structures.

[0013] As a preferred technical solution, the water tank and the chassis are provided with a first magnetic attraction mechanism that cooperates with each other. When the water tank is inserted into the first mounting slot, the water tank and the chassis can be attracted to each other through the first magnetic attraction mechanism. The side of the water tank connector and / or the chassis connector is provided with a groove, and a sealing gasket is provided in the groove. When the water tank and the chassis are attracted to each other through the first magnetic attraction mechanism, the sealing gasket can be squeezed to improve the sealing performance. The chassis and the handle are provided with a second magnetic attraction mechanism that cooperates with each other. The handle can be naturally attracted to the chassis through the second magnetic attraction mechanism.

[0014] Compared with existing technologies, the portable teeth cleaning device provided in this application has the following main innovations and technical effects:

[0015] By setting parallel air passages A and B at different outlets of the valve assembly, air passage A can be opened and air passage B closed when a dental cleaning operation is needed, using the compressed air from air passage A to spray the abrasive powder from the powder chamber for cleaning. Conversely, air passage A can be closed and air passage B opened after the cleaning operation, using the compressed air from air passage B to automatically clean any remaining abrasive powder in the pipes and handle, preventing blockages. An air handling unit containing a gas filter and a gas dryer is installed between the air pump outlet and the valve assembly inlet to filter and dry the compressed air, preventing abrasive powder from sticking, clogging, or contaminating the powder chamber, pipes, and handle. A silencer is installed at the air pump inlet to reduce noise generated during operation, improving the user experience.

[0016] By setting a visualization mechanism on the nozzle, which includes a protective cover, a camera and a light assembly inside the protective cover, the camera and light assembly can be used to capture real-time images of the operating area for easy real-time observation. By setting an air jet hole inside the protective cover that connects to the main air pump or an auxiliary air pump built into the handle housing, the positive pressure airflow ejected from the air jet hole can be used to disperse splashing water mist and mouth mist during operation, preventing the camera from being affected by water mist and mist. This makes it easy to conduct real-time observation of the mouth during sandblasting. Moreover, the positive pressure airflow acting on the camera and light assembly can also play a role in heat dissipation.

[0017] By incorporating a nozzle angle adjustment mechanism, users can flexibly adjust the nozzle angle using the angle adjustment button without repeatedly switching the handheld handle posture, making it convenient to use.

[0018] The water tank and the main unit are connected by a side plug-in connection. The water tank can be removed and placed from the side of the main unit during use, which avoids occupying the space above the dental cleaning device and can be used in more practical application scenarios. In addition, the water tank connector is located on the upper part of the side wall of the water tank, which is not easy to leak downwards, thus improving the user experience and service life.

[0019] The following will further explain the concept, specific structure and effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the portable teeth cleaning device in the embodiment;

[0021] Figure 2 This is one of the structural diagrams of the main unit with the hidden portion of the casing in its state;

[0022] Figure 3 This is the second structural diagram of the main unit with the hidden portion of the casing in its state;

[0023] Figure 4 This is one of the structural diagrams showing the water tank and the casing separated.

[0024] Figure 5 This is the second structural diagram showing the water tank and the casing separated.

[0025] Figure 6 It is a structural diagram of a handle with a visualization mechanism;

[0026] Figure 7 yes Figure 6 A magnified structural diagram of part A in the middle;

[0027] Figure 8 yes Figure 6 A schematic diagram of the structure of the middle handle after the handle housing is concealed.

[0028] Figure 9 This is a schematic diagram of a handle equipped with a nozzle angle adjustment mechanism;

[0029] Figure 10 This is a schematic diagram of the nozzle angle adjustment mechanism.

[0030] The components include: main unit 1, chassis 11, main control board 111, water pump 112, main air pump 113, silencer 114, gas filter 1151, gas dryer 1152, valve group 116, first check valve 1161, second check valve 1162, first mounting groove 117, guide strip 1171, chassis connector 118, chassis interface 119, water tank 12, water tank connector 121, water suction channel 122, cover 123, guide groove 124, and sealing gasket. 125, powder hopper 13, handle 2, handle housing 21, nozzle 22, spray nozzle 221, sandblasting nozzle 222, control button 23, protective cover 241, camera 242, light assembly 243, air jet 244, auxiliary air pump 245, anti-fog button 246, angle adjustment key 251, transmission mechanism 252, lever 253, handle connector 26, first tee connector 31, second tee connector 32, third tee connector 33, first magnetic attraction mechanism 41. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0032] It should be noted that in this application, the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are primarily used to better describe this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, the terms "installed," "set," "equipped with," "connected," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] like Figure 1-10As shown, this embodiment provides a portable teeth cleaning device, including a main unit 1 and a handle 2. The main unit 1 includes a housing 11, a water tank 12 and a powder container 13 installed in the housing 11. The handle 2 includes a handle housing 21 and a nozzle 22 disposed at the front end of the handle housing 21. The nozzle 22 is provided with a liquid spray port 221 and a sandblasting port 222. The housing 11 is provided with a main control board 111, a water pump 112 and a main air pump 113. The inlet of the main air pump 113 is provided with a silencer 114, and the outlet is connected in sequence to an air handling unit and a valve group 116. The air handling unit includes a gas filter 1151 and a gas dryer 1152 connected in series (in no particular order). The valve group 116 is provided with at least two outlets, one of which is connected to a first one-way valve 1161. Air path A is connected to air path B via a second one-way valve 1162. The powder hopper 13 is located on air path A and can be flushed out of the powder by the compressed air in air path A and flow forward along air path A. The ends of air path A and air path B merge and are connected to the handle 2 and the sandblasting port 222 via an air pipe. The inlet of the water pump 112 is connected to the water tank 12, and the outlet is connected to the handle 2 and the liquid spraying port 221 via a water pipe. The main control board 111 is connected to the main air pump 113, the water pump 112, and the valve group 116. The valve group 116 is a solenoid valve. The handle 2 and / or the chassis 11 are provided with control buttons 23 connected to the main control board 111, and the working status of the dual-head air pump, the water pump 112, and the valve group 116 can be controlled by the control buttons 23.

[0034] During use, the user holds the handle 2 and inserts it into their mouth, aligning the nozzle 22 with the teeth to be cleaned. The user then activates the cleaning device and enters the cleaning operation mode. The main air pump 113 and water pump 112 operate synchronously, and the valve assembly 116 opens air path A and closes air path B. The handle 2 draws out liquid (usually water) from the water tank 12 and sprays it from the spray nozzle 221 on the handle 2. Air path A fills the powder chamber 13 with compressed air discharged from the main air pump 113, flushing out the sand powder within the powder chamber 13. This sand powder flows forward along air path A and is sprayed from the sand spray nozzle 222 on the handle 2, using high-speed water flow and sand powder to clean the tooth surface. When the user finishes cleaning and stops the cleaning operation mode, the device automatically enters the automatic cleaning mode through program settings. At this time, the water pump 112 stops working, the main air pump 113 continues to work, and the valve assembly 116 opens air path B and closes air path A, using compressed air to flush away residual sand powder from the pipes and handle 2, thus achieving automatic cleaning.

[0035] The portable dental cleaning device provided in this embodiment has parallel air passages A and B at different outlets of the valve assembly 116. This allows for both opening air passage A and closing air passage B when dental cleaning is needed, using compressed air from air passage A to spray abrasive powder from the powder chamber 13 for cleaning, and closing air passage A and opening air passage B after dental cleaning, using compressed air from air passage B to automatically clean abrasive powder remaining in the pipes and handle 2 after abrasion, preventing blockage. An air handling device, including a gas filter 1151 and a gas dryer 1152, is installed between the outlet of the air pump and the inlet of the valve assembly 116 to filter and dry the compressed air, preventing abrasive powder from sticking, clogging, or contaminating the powder chamber 13, pipes, and handle 2. A silencer 114 is installed at the inlet of the air pump to reduce the noise generated by the air pump and improve the user experience.

[0036] As a preferred technical solution, the portable teeth cleaning device of this embodiment is equipped with two handles 2. One of the handles has a visual mechanism on the nozzle 22. The visual mechanism includes a protective cover 241 with an open front end, a camera 242 and a light assembly 243 inside the protective cover 241, an air jet 244 on the side wall of the protective cover 241 and in front of the camera 242 and the light assembly 243, a pipe connecting the air jet 244, and an anti-fog button 246. The pipe is connected to an auxiliary air pump 245 built into the handle housing 21 (in other embodiments, the auxiliary air pump 245 can be omitted, and the air jet 244 can be directly connected to the main air pump 113 inside the housing 11 through the pipe, and the main air pump 113 can provide positive pressure airflow to the air jet 244). By setting a visualization mechanism on the nozzle 22, which includes a protective cover 241, a camera 242 and a light assembly 243 set inside the protective cover 241, the camera 242 and the light assembly 243 can be used to capture images of the operating area in real time and present them to the user on the host monitor or other external monitors for easy real-time observation. By setting an air jet hole 244 connected to the auxiliary air pump 245 inside the protective cover 241, the positive pressure airflow ejected from the air jet hole 244 can be used to disperse splashing water mist and mouth mist during operation, preventing the camera 242 from being affected by water mist and mist, thus facilitating easy real-time observation of the mouth during sandblasting. Moreover, the positive pressure airflow acting on the camera 242 and the light assembly 243 can also play a role in heat dissipation. Furthermore, preferably, the lamp assembly 243 includes a plurality of LED beads distributed circumferentially around the camera 242, and the air jet 244 is located on the front side of the camera 242 and the LED beads. This design facilitates the LED beads to provide illumination for the camera 242, facilitates the positive pressure airflow from the air jet 244 to dispel splashing water mist and mouth mist, and facilitates the self-cleaning of the camera 242, and also facilitates the positive pressure airflow to dissipate heat from the camera 242 and the lamp assembly 243.

[0037] Another handle features a nozzle angle adjustment mechanism, including an angle adjustment key 251 movably mounted on the handle housing 21 and a transmission mechanism 252 located inside the handle housing 21. The nozzle 22 is hinged to the handle housing 21. The angle adjustment key 251 is connected to the nozzle 22 via the transmission mechanism 252. The angle adjustment key 251 can move relative to the handle housing 21, thereby allowing the nozzle 22 to swing relative to the handle housing 21 via the transmission mechanism 252, thus adjusting the nozzle 22's orientation angle. In this embodiment, the nozzle angle adjustment mechanism is specifically structured as follows: the angle adjustment key 251 is slidably connected to the surface of the handle housing 21, and the angle adjustment... A lever 253 is provided on the back of the key 251. The transmission mechanism 252 includes a connecting rod. One end of the connecting rod is hinged to the lever 253 on the back of the angle adjustment key 251, and the other end is hinged to the nozzle 22. Preferably, the hinge points at both ends of the connecting rod and the hinge point between the nozzle 22 and the handle housing 21 are parallel to each other. The hinge point between the nozzle 22 and the connecting rod is located at the rear end of the nozzle 22, and the nozzle is located at the front end of the nozzle 22. The hinge point between the nozzle 22 and the handle housing 21 is located between the front and rear ends of the nozzle 22. By sliding the angle adjustment key 251 back and forth, the nozzle 22 can be driven to swing up and down relative to the outer frame of the handle 2 via the connecting rod. In this solution, by setting the nozzle angle adjustment mechanism, the user can flexibly adjust the angle of the nozzle 22 by means of the angle adjustment key 251 during use, without having to repeatedly switch the posture of holding the rinsing handle 2, which is convenient to use. Furthermore, preferably, there is friction damping between the angle adjustment key 251 and the handle housing 21, and the nozzle can be naturally positioned under the action of friction damping. In other embodiments, a locking mechanism for locking or unlocking the angle adjustment key 251 can be provided between the angle adjustment key 251 and the handle housing 21. The locking mechanism can be any existing mechanism capable of locking and unlocking; its specific structure is not limited or described in detail here, and is omitted from the accompanying drawings. Alternatively, in other embodiments, only one handle may be provided, and both a visualization mechanism and a nozzle angle adjustment mechanism may be provided on this handle.

[0038] As a preferred technical solution, the side of the casing 11 is provided with a first mounting groove 117 for installing the water tank 12. The side wall of the water tank 12 and the casing 11 are provided with a water tank connector 121 and a casing connector 118 that cooperate with each other. The casing connector 118 is connected to the inlet of the water pump 112 through a pipeline. When the water tank 12 is inserted into the first mounting groove 117, the water tank connector 121 and the casing connector 118 can be connected. The water tank connector 121 is located at the upper part of the side wall of the water tank 12. The inner side wall of the water tank 12 is also provided with a water suction channel 122. The upper end of the water suction channel 122 is connected to the water tank connector 121, and the lower end extends to the bottom of the water tank 12. The water tank 12 and the chassis 11 of the main unit 1 are connected by a side plug-in method. When in use, the water tank 12 is removed and placed from the side of the main unit 1, which can avoid occupying the space above the dental cleaning device and thus be applicable to more practical application scenarios. Moreover, the water tank connector 121 is located on the upper part of the side wall of the water tank 12, which is not easy to leak downwards, thus improving the user experience and service life.

[0039] As a preferred technical solution, the ends of air path A and air path B are joined together through a first tee connector 31. The main air pump 113 is a dual-head air pump. The two inlets of the dual-head air pump are joined together through a second tee connector 32 and then connected to the silencer 114. The two outlets of the dual-head air pump are joined together through a third tee connector 33 and then connected to the air handling unit. The top of the housing 11 has a second mounting slot with an upward opening for installing the powder hopper 13. The main control board 111 and the air handling unit are vertically installed inside the housing 11 between the first mounting slot 117 and the second mounting slot. The dual-head air pump, silencer 114, water pump 112, and valve group 116 are horizontally installed inside the housing 11 below the first mounting slot 117 and the second mounting slot. This design has a compact structure, high space utilization, and can effectively reduce the size of the dental cleaning device, making it suitable for miniaturized home use.

[0040] As a preferred technical solution, the water pipe includes an external water pipe section connecting to the handle 2 and an internal water pipe section connecting to the water pump 112. The air pipe includes an external air pipe section connecting to the handle 2 and an internal air pipe section connecting to the first tee connector 31. The ends of the external water pipe section and the external air pipe section are provided with handle connectors 26. The ends of the internal water pipe section and the internal air pipe section are provided with chassis interfaces 119 that mate with the handle connectors 26. The chassis interfaces 119 are located on the outer side wall of the chassis 11. The handle connectors 26 and the chassis interfaces 119 can be connected by threads or other connection methods, which can simultaneously meet the sealing connection requirements of the water circuit and the air circuit. This solution allows users to replace different handles 2 as needed.

[0041] As a preferred technical solution, the top surface of the water tank 12 is provided with a cover 123, and the top surface of the cover 123 is provided with a guide groove 124. The first mounting groove 117 is provided with a guide strip 1171 that cooperates with the guide groove 124. The guide groove 124 and the guide strip 1171 are mutually cooperating isosceles trapezoidal structures or isosceles triangular structures. This design facilitates the user's guidance when taking out and putting in the water tank 12. The guide groove 124 and the guide strip 1171 are mutually cooperating isosceles trapezoidal structures or isosceles triangular structures. During the process of inserting the water tank 12 into the first mounting groove 117, the small diameter end of the guide strip 1171 is inserted into the large diameter end of the guide groove 124 first, which facilitates insertion and can play a guiding role in subsequent movement.

[0042] As a preferred technical solution, the water tank 12 and the casing 11 are provided with a first magnetic attraction mechanism 41 that cooperates with each other. In this embodiment, the first magnetic attraction mechanism 41 includes magnets (or one is a magnet and the other is a magnetically attracted metal) respectively disposed on the side walls of the water tank 12 and the casing 11. When the water tank 12 is inserted into the mounting slot, the water tank 12 and the casing 11 can be attracted to each other through the first magnetic attraction mechanism 41. The side periphery of the water tank connector 121 is provided with a groove, and a sealing gasket 125 is provided in the groove. This design can magnetically position the water tank 12, and improve the user's operating feel when taking out and putting in the water tank 12. When the water tank 12 and the casing 11 are attracted by the first magnetic attraction mechanism 41, the sealing gasket 125 can be squeezed to improve the sealing performance.

[0043] As a preferred embodiment, the water tank connector 121 includes a first insertion pipe, and the chassis connector 118 includes an insertion hole for inserting the first insertion pipe and a second insertion pipe disposed on the back of the insertion hole for inserting the water pipe. The axial direction of the first insertion pipe and the insertion hole is the same as the insertion and removal direction of the water tank 12 relative to the chassis 11. The outer walls of the first insertion pipe and the second insertion pipe are provided with annular grooves, and sealing rings are disposed in the annular grooves.

[0044] As a preferred technical solution, the housing 11 and the handle 2 are provided with a second magnetic attraction mechanism that cooperates with each other. In this embodiment, the second magnetic attraction mechanism includes magnets (or one is a magnet and the other is a metal that can be magnetically attracted, not shown in the figure) respectively disposed on the inner side wall of the housing 11 and the rinsing handle 2. The rinsing handle 2 can be naturally attracted to the housing 11 through the second magnetic attraction mechanism. This design can magnetically position the rinsing handle 2 and increase the user's operating feel when picking up and putting down the rinsing handle 2.

[0045] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A portable dental cleaning device comprising a main unit and a handle, characterized in that, The main unit includes a chassis, a water tank and a powder hopper installed in the chassis. The handle includes a handle housing and a nozzle located at the front end of the handle housing. The nozzle has a liquid spray port and a sand spray port. The chassis contains a water pump and a main air pump. The inlet of the main air pump is equipped with a silencer. The outlet is connected in sequence to an air handling unit and a valve group. The air handling unit includes a gas filter and a gas dryer. One outlet of the valve group is connected to air path A through a first one-way valve, and the other outlet is connected to air path B through a second one-way valve. The powder hopper is located on air path A and can be flushed out of the powder hopper by the compressed air in air path A and flow forward along air path A. The ends of air path A and air path B merge and are connected to the handle and the sand spray port through an air pipe. The inlet of the water pump is connected to the water tank, and the outlet is connected to the handle and the liquid spray port through a water pipe.

2. The portable dental cleaning device of claim 1, wherein, The nozzle is also equipped with a visualization mechanism, which includes a protective cover set on the nozzle with an opening at the front end, a camera and light assembly set inside the protective cover, an air jet hole set on the side wall of the protective cover and located in front of the camera and light assembly, and a pipe connecting to the air jet hole. The pipe is connected to the main air pump or an auxiliary air pump built into the handle housing.

3. The portable dental device of claim 1, wherein, The handle is equipped with a nozzle angle adjustment mechanism, including an angle adjustment key movably mounted on the handle housing and a transmission mechanism mounted inside the handle housing. The nozzle is hinged to the handle housing, and the angle adjustment key is connected to the nozzle through the transmission mechanism. The angle adjustment key can move relative to the handle housing, thereby driving the nozzle to swing relative to the handle housing through the transmission mechanism to adjust the nozzle orientation angle.

4. The portable dental device of claim 1, wherein, The side of the chassis has a first mounting slot for installing the water tank. The side wall of the water tank and the chassis have a matching water tank connector and chassis connector. The chassis connector is connected to the inlet of the water pump through a pipe. When the water tank is inserted into the first mounting slot, the water tank connector and chassis connector can be plugged in and connected. The water tank connector is located on the upper part of the side wall of the water tank. The inner side wall of the water tank also has a water suction channel. The upper end of the water suction channel is connected to the water tank connector, and the lower end extends to the bottom of the water tank.

5. The portable dental device of claim 1, wherein, The ends of air path A and air path B are joined together by a first tee connector. The main air pump is a dual-head air pump. The two inlets of the dual-head air pump are joined together by a second tee connector and then connected to the silencer. The two outlets of the dual-head air pump are joined together by a third tee connector and then connected to the air handling unit. The top of the chassis is provided with a second mounting slot with an upward opening for installing the powder hopper. The air handling unit is vertically installed inside the chassis between the first and second mounting slots. The dual-head air pump, silencer, water pump, and valve assembly are horizontally installed inside the chassis below the first and second mounting slots.

6. The portable teeth cleaning device according to claim 1, characterized in that, The chassis also contains a main control board, which is connected to the main air pump, water pump, and valve group. The valve group is a solenoid valve. The handle and / or the chassis are equipped with control buttons connected to the main control board, which can control the working status of the dual-head air pump, water pump, and valve group.

7. The portable dental device of claim 5, wherein, The water pipe includes an external water pipe section connected to the handle and an internal water pipe section connected to the water pump. The air pipe includes an external air pipe section connected to the handle and an internal air pipe section connected to the first tee connector. The ends of the external water pipe section and the external air pipe section are provided with handle connectors. The ends of the internal water pipe section and the internal air pipe section are provided with chassis interfaces that mate with the handle connectors. The chassis interfaces are located on the outer wall of the chassis.

8. The portable dental device of claim 4, wherein, The water tank is provided with a cover on its top surface, and a guide groove is provided on the top surface of the cover. The first mounting groove is provided with a guide strip that matches the guide groove. The guide groove and the guide strip are mutually matching isosceles trapezoidal structures or isosceles triangular structures.

9. The portable dental device of claim 4, wherein, The water tank and the chassis are provided with a first magnetic attraction mechanism that cooperates with each other. When the water tank is inserted into the first mounting slot, the water tank and the chassis can be attracted to each other through the first magnetic attraction mechanism. The side of the water tank connector and / or the chassis connector is provided with a groove, and a sealing gasket is provided in the groove. When the water tank and the chassis are attracted to each other through the first magnetic attraction mechanism, the sealing gasket can be squeezed to improve the sealing performance. The chassis and the handle are provided with a second magnetic attraction mechanism that cooperates with each other. The handle can be naturally attracted to the chassis through the second magnetic attraction mechanism.

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