Hand-washing table using ultrasonic waves for hand cleaning

Abstract

The utility model discloses a hand -washing table of utilizing ultrasonic wave to hand cleaning, including basin, the faucet is set up on the basin, and the bottom of basin is equipped with first drain pipe, is equipped with cleaning cavity in the basin, and is provided with more than one ultrasonic transducer on the cleaning cavity, and the ultrasonic transducer includes piezoelectric ceramic type transducer sheet and drive module, and piezoelectric ceramic type transducer sheet is fixed on the outer wall of cleaning cavity. The utility model utilizes the high frequency vibration water flow of ultrasonic transducer in the cleaning cavity, and the cavitation bubble burst of the cavitation effect is formed and produces shock wave and micro jet, can go into the traditional cleaning blind area such as hand joint, nail joint, palm print, and high frequency micro impact destroys the adsorption of stain and skin surface, and simultaneously, compared with traditional two hands rubbing cleaning mode, need not rely on mechanical kneading to realize stubborn stain (such as oil stain, ink mark) high -efficient removal.

Description

Technical Field

[0001] This utility model relates to the field of cleaning devices, and in particular to a handwashing station that uses ultrasonic waves to clean the hands. Background Technology

[0002] Traditional handwashing methods rely primarily on rubbing hands together with detergent to remove dirt. However, they are limited in their effectiveness at cleaning delicate areas such as between fingers, nails, and palm lines, often requiring repeated rubbing or the use of tools (like nail brushes). This is inefficient and can potentially cause skin damage due to improper force. While existing automatic sensor faucets offer contactless water dispensing, they only address water flow control and do not fundamentally improve cleaning capabilities for complex areas. Furthermore, traditional basins are limited in function, easily interfering with handwashing when washing small items, and also resulting in water waste and missed cleaning spots.

[0003] With the widespread application of ultrasonic technology in civilian fields (such as eyeglass cleaning machines and fruit and vegetable cleaning machines), its ability to achieve efficient cleaning through cavitation effects and high-frequency vibrations has been verified. However, it has not yet been integrated with handwashing stations to form dedicated equipment. Current technology lacks a handwashing device that can use ultrasonic waves to specifically clean the delicate areas of the hands, reduce hand contact friction, improve cleaning efficiency, and optimize the user experience. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a handwashing station that uses ultrasonic waves to clean the hands, which uses an independent cleaning chamber and an ultrasonic transducer installed therein to clean the hands.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a handwashing basin that uses ultrasonic waves to clean hands, including a basin, a faucet for spraying water on the basin, a first drain pipe at the bottom of the basin, a cleaning chamber for cleaning hands inside the basin, and one or more ultrasonic transducers on the cleaning chamber. The ultrasonic transducer includes a piezoelectric ceramic transducer and a driving module that works in conjunction with the piezoelectric ceramic transducer. The piezoelectric ceramic transducer is fixed on the outer wall of the cleaning chamber, and the piezoelectric ceramic transducer generates ultrasonic waves into the basin through the metal covering its surface.

[0006] Preferably, the cleaning chamber is located at the bottom of the water basin and is fixedly connected to the first drain pipe.

[0007] Preferably, the cleaning chamber and the water basin are connected by integral firing, welding or bonding.

[0008] Preferably, the cleaning cavity is a cuboid or a cylinder.

[0009] Preferably, the cleaning chamber is located inside the side wall above the overflow hole of the basin, and the cleaning chamber is connected to the water-containing chamber of the basin through a guide.

[0010] Preferably, the receiving cavity formed by extending from the guide inlet into the cleaning cavity has an overall longitudinal section that is spoon-shaped, straight at the front and gradually curved downwards at the back, and the cleaning cavity is connected to the first drain pipe through the second drain pipe.

[0011] Preferably, sensors for sensing object insertion are provided on both sides of the guide entrance near the top wall.

[0012] Preferably, the top wall of the cleaning chamber is provided with a water spray pipe, which is connected to the water supply pipe of the faucet, and a solenoid valve is provided on the water supply pipe to control the on / off state of the water spray pipe.

[0013] Preferably, the guide portion has a rectangular cross-section.

[0014] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0015] 1. Utilizing the high-frequency vibrating water flow generated by the ultrasonic transducer inside the cleaning chamber, the cavitation effect creates shock waves and micro-jet streams through the collapse of cavitation bubbles. These can penetrate deep into traditional cleaning blind spots such as between fingers, nails, and palm lines. The high-frequency micro-impact breaks down the adhesion between stains and the skin surface. Compared to traditional hand-rubbing cleaning methods, it can effectively remove stubborn stains (such as oil and ink stains) without relying on mechanical rubbing.

[0016] 2. The independent cleaning chamber has a significantly smaller volume than traditional basins, greatly reducing the amount of water used per cleaning session. Combined with a precise sensor-activated water filling function, it further reduces water waste. The cleaning chamber design above the overflow hole prevents small items from accidentally falling into the chamber when cleaning. The optimized basin space enhances compatibility and allows for a reasonable separation of hand cleaning and item washing functions, avoiding operational interference. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present utility model. Figure 2 ;

[0019] Figure 3 for Figure 1 A sectional view;

[0020] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention. Figure 1 ;

[0021] Figure 5This is a schematic diagram of the structure of the second embodiment of the present utility model. Figure 2 ;

[0022] Figure 6 for Figure 1 A partial schematic diagram.

[0023] The components include: a water basin 1; a faucet 11; a first drain pipe 12; a cleaning chamber 2; an ultrasonic transducer 21; a water spray pipe 22; a second drain pipe 23; a guide section 24; and a sensor 25. Detailed Implementation

[0024] This application relates to a handwashing basin that uses ultrasonic waves to clean hands. Specifically, it is a handwashing basin that uses ultrasonic waves to vibrate water flow to clean the user's hands. It includes a basin 1 and a cleaning chamber 2. The basin 1 has a water-containing chamber. The function of the basin 1 is the same as that of the prior art, mainly used for cleaning body parts (such as hands) and washing small items. It includes at least one water inlet valve (i.e., a faucet) and a drain device (i.e., a drain valve). The faucet and drain valve can be selected as contact or non-contact drain valves depending on the usage scenario. Moreover, existing contact drains (e.g., flap drains, pull-up drains, pop-up drains, sink pull-up control switch drains, etc.) or non-contact drain valves (foot-operated drains, sensor drains, etc.) have been developed to a relatively mature level. Example 1

[0025] The cleaning chamber 2 is located at the bottom of the water basin 1 and is connected to the first drain pipe 12 located on the water basin 1. The drain valve is connected between the cleaning chamber and the drain pipe 12.

[0026] like Figures 1 to 3 As shown, a cleaning chamber 2 extends downward from the bottom of the basin 1. The cleaning chamber 2 is fixed to and connected to the basin 1. Depending on the material characteristics of the basin 1, the cleaning chamber 2 can be constructed using welding, bonding, or integral casting processes. A first drain pipe 12 for discharging wastewater is fixed to and connected to the bottom of the cleaning chamber 2. The basin 1 is equipped with a faucet 11 for water flow. In this embodiment, the structure of the cleaning chamber 2 is as follows: Figure 1 As shown, it is a cuboid or cylindrical container with an upper opening. When an adult's palms are naturally open and facing each other, they can be inserted into the cleaning chamber 2. The water level in the cleaning chamber 2 can completely cover the palm print area, finger gaps, and nail roots of the hand. Preferably, the cavity of the cleaning chamber 2 is designed to mimic the shape of a hand, achieving a minimum water consumption while meeting the above-mentioned immersion requirements. Multiple ultrasonic transducers 21 are installed inside the cleaning chamber 2, and the multiple ultrasonic transducers 21 are respectively installed on the outer wall of the cleaning chamber 2.

[0027] Preferably, the ultrasonic transducer 21 includes at least a piezoelectric ceramic transducer and a driving module used in conjunction with the piezoelectric ceramic transducer. This type of ultrasonic transducer 21 is commonly found in devices such as eyeglass cleaning machines and jewelry cleaning machines. Its working principle is that the piezoelectric ceramic transducer generates ultrasonic waves through the inverse piezoelectric effect. The cavitation effect of the ultrasonic waves generates cavitation bubbles, and the shock waves and microjets generated by the collapse of these cavitation bubbles directly act on the surface of the object, creating high-frequency micro-impacts on the stains. This disrupts the adhesion between the stains and the object's surface, causing the stains to detach. Simultaneously, the high-frequency vibration of the ultrasonic waves causes macroscopic convection in the liquid, carrying the detached stain particles into the water flow, preventing secondary adhesion. It should be noted that the piezoelectric ceramic transducer and its supporting driving module are existing mature technologies, widely used in the civilian sector, and have a well-established supply chain. Since the above content is not the core of the technical solution protected in this application, its principles will not be elaborated further. Those skilled in the art can fully understand the principles and applications of such components and can obtain them without difficulty through conventional channels.

[0028] Preferably, the piezoelectric ceramic transducer is bonded to the center of the outer surface (i.e., the backwater side) of the cleaning chamber 2 using ceramic adhesive. After water is injected into the cleaning chamber 2, the water level always covers the energy radiation area of ​​the piezoelectric ceramic transducer. The basin of the cleaning chamber 2 serves as the energy transfer medium, transmitting the mechanical energy generated by the transducer into the cleaning chamber 2 through the basin. Ceramic adhesive is chosen as the bonding agent between the transducer and the energy transfer medium because it has inelastic properties after curing, avoiding absorption of vibrations and ensuring efficient transmission of ultrasonic energy. The drive module is located outside the water basin 1, powered by a power source, and equipped with a control switch. The drive module provides an adjustable frequency current to the piezoelectric ceramic transducer, thereby converting electrical energy into mechanical energy through the transducer, thus generating ultrasonic waves.

[0029] Furthermore, a stainless steel metal sheet is provided at the junction of the piezoelectric ceramic transducer and the cleaning chamber 2. This metal sheet is embedded within an opening in the cleaning chamber 2, with one side of the metal sheet facing the water-filled side of the chamber 2, and the other side covering the surface of the piezoelectric ceramic transducer in the ultrasonic transducer 21, forming a medium for transmitting ultrasonic energy and reducing attenuation during ultrasonic transmission. If the cleaning chamber 2 is made of metal, this metal sheet can be omitted.

[0030] During use:

[0031] When a user needs to clean their hands, the water flowing from faucet 11 wets the user's hands, and the water flows into the cleaning chamber 2. This simultaneously powers the drive module of the ultrasonic transducer 21 (either via a single-foot pedal switch or other methods), causing the ultrasonic transducer 21 inside the cleaning chamber 2 to convert electrical energy into ultrasonic waves. As the water flows through the piezoelectric ceramic transducer, the ultrasonic waves propagate in the water, generating countless tiny cavitation bubbles. When the water level in the cleaning chamber 2 reaches the required amount for cleaning the hands, faucet 11 can be temporarily turned off. The user can then place their wet hands directly into the cavitation bubble area, or apply a suitable amount of detergent to their hands before inserting them. The high-frequency mechanical vibration of the ultrasonic waves induces a strong cavitation effect in the water flow. This effect generates and bursts tiny bubbles rapidly, creating a powerful impact and micro-jet that penetrates deep into the palm lines, narrow gaps between fingers, and hard-to-reach areas like under the nails. Compared to traditional hand-rubbing cleaning, it removes dirt, grease, and bacteria more efficiently, significantly improving cleaning effectiveness. After cleaning for a period of time, disconnect the drive module (e.g., use a single-foot release switch), the ultrasonic waves stop, drain the water from the cleaning chamber 2, and then turn on the faucet 11 to rinse the hand surface. Example 2

[0032] Based on Example 1, the position of the cleaning chamber 2 is further optimized, while the other structures are the same as in Example 1.

[0033] The cleaning chamber 2 is located inside the side wall of the basin 1 and above the overflow hole. Compared with the method in Embodiment 1 where it is located at the bottom of the basin 1, it reduces the distance the user's hand has to reach downward, reduces the degree of bending over, and also improves the user's comfort when washing hands.

[0034] In embodiment 2, the overall volume of the cleaning chamber 2 is smaller than that of the cleaning chamber 2 in the first embodiment, which ensures that the user's hands can be placed flat inside, and the reduced volume can reduce the amount of water consumed by the user to clean their hands.

[0035] like Figure 4As shown, a guide section 24 for guiding hands into the basin is provided above the overflow hole of the basin 1. The inlet of the guide section 24 is located above the overflow hole and extends outward along the rim of the basin 1, communicating with the cleaning chamber 2 located in the side wall of the basin 1. The guide section 24 and the cleaning chamber 2 together form a water-containing chamber, and the horizontal height of the cleaning chamber 2 is lower than that of the guide section 24. Specifically, the upper limit of the water level in the cleaning chamber 2 and the lower limit of the water level in the guide section 24 are on the same plane. The overall longitudinal section of both is a spoon shape that is straight at the front and gradually curves downward at the back. The purpose of this shape design is to facilitate water storage and allow the user's hands to maintain a natural curved state when cleaning. The cleaning chamber 2 is used to soak the fingers inserted from the guide section 24. Specifically, when an adult's palms are naturally open, the palms can be inserted into the cleaning chamber 2 side by side. The water level in the cleaning chamber 2 can completely cover the palm print area, finger gaps, and nail roots of the hand. Preferably, the cavity of the cleaning chamber 2 adopts a hand-shaped design to achieve the minimum water consumption while meeting the above soaking conditions.

[0036] like Figures 4 to 6 As shown, a water spray pipe 22 for injecting water is installed at the top of the cleaning chamber 2. The water spray pipe 22 is connected to the water supply pipe of the faucet 11. An electromagnetic valve connected by electromagnetic control is installed on the water spray pipe 22. The electromagnetic valve is located outside the water basin 1 and is waterproof. Sensors 25 for triggering the electromagnetic valve are installed on the inner walls of both sides of the guide part 24. The ultrasonic transducers 21 are preferably two symmetrically arranged. The piezoelectric ceramic transducers in the ultrasonic transducers 21 are symmetrically arranged at the lower left and right ends of the cleaning chamber 2, and the water level always covers the energy radiation area of ​​the piezoelectric ceramic transducers after water is injected into the cleaning chamber 2. The drive module for providing power to the piezoelectric ceramic transducers is fixed to the outside of the water basin 1 and has been waterproofed. A second drain pipe 23 is installed at the bottom of the cleaning chamber 2 for draining water from the cleaning chamber 2 in this embodiment. A first drain pipe 12 is installed at the bottom of the water basin 1, and a drain valve is provided between the first drain pipe 12 and the water basin 1. The second drain pipe 23 is connected to the first drain pipe 12 via a T-connector or heat fusion, allowing wastewater in the cleaning chamber 2 to drain into the first drain pipe 12 through the second drain pipe 23. A drain valve is provided between the second drain pipe 23 and the cleaning chamber 2 to control the connection or disconnection between the two. This drain valve can be either a contact type or a non-contact type.

[0037] like Figure 6 As shown, sensor 25 is located on the upper left and right side walls of the guide section 24 entrance. Preferably, sensor 25 is an active infrared sensor, with the transmitting and receiving ends of the active infrared sensor symmetrically arranged on the opposite side walls of the guide section 24. When the user's hand is inserted into the cleaning chamber 2, the active infrared sensor senses the hand and activates the water spray pipe 22 to spray.

[0038] To achieve automatic control, the sensor 25, the drive circuit in the ultrasonic transducer 21, and the solenoid valve of the spray pipe 22 are electrically connected to the controller. Specifically, when the controller 25 collects a hand insertion signal through the sensor 25, it converts the signal into an electrical signal and transmits it to the controller 25. After receiving and recognizing the electrical signal, the controller 25 outputs a start control signal to the drive circuit of the ultrasonic transducer 21 and the solenoid valve of the spray pipe 22, controlling the spray pipe 22 to open and perform spraying operations, and controlling the piezoelectric ceramic transducer to generate ultrasonic waves. When the sensor 25 cannot collect a hand signal, it also converts it into an electrical signal and transmits it to the controller 25. After recognizing the electrical signal corresponding to the no-person signal, the controller 25 outputs a stop control signal to the solenoid valve and drive circuit on the spray pipe 25, stopping the spraying operation and the piezoelectric ceramic transducer to stop generating ultrasonic waves.

[0039] Usage process:

[0040] When a user needs to clean their hands, they insert their hand into the guide section 24 until it reaches the cleaning chamber 2. The controller then activates the water spray pipe 22 to wet the user's hand, gradually filling the cleaning chamber 2 to ensure the entire palm is enveloped in water. Excess water will overflow from the cleaning chamber 2 through the guide section 24, but this will not affect the subsequent ultrasonic cleaning. Simultaneously, the controller controls the drive module to generate ultrasonic waves, which clean the user's palm. The user can remove their hand midway to apply soap or hand sanitizer before re-inserting it into the cleaning chamber 2 for continued cleaning. The arc-shaped cavity within the cleaning chamber 2 allows for natural finger bending, reducing discomfort caused by prolonged finger stiffness without affecting the cleaning effect. After ultrasonic cleaning, the user opens the drain valve in the cleaning chamber 2 (either a contact or non-contact drain valve can be selected as needed by those skilled in the art), draining the water from the cleaning chamber 2 into the first drain pipe 12. Finally, the user rinses their hands again with the faucet 11.

Claims

1. A handwashing basin for cleaning hands using ultrasonic waves, comprising a basin (1), a faucet (11) for spraying water on the basin (1), and a first drain pipe (12) at the bottom of the basin (1), characterized in that: The basin (1) is provided with a cleaning chamber (2) for cleaning hands. The cleaning chamber (2) is provided with one or more ultrasonic transducers (21). The ultrasonic transducer (21) includes a piezoelectric ceramic transducer and a drive module used in conjunction with the piezoelectric ceramic transducer. The piezoelectric ceramic transducer is fixed on the outer wall of the cleaning chamber (2). The piezoelectric ceramic transducer generates ultrasonic waves into the basin (1) through the metal covering its surface.

2. The handwashing basin for cleaning hands using ultrasound according to claim 1, characterized in that: The cleaning chamber (2) is located at the bottom of the water basin (1) and is fixedly connected to the first drain pipe (12).

3. The handwashing basin for cleaning hands using ultrasound according to claim 2, characterized in that: The cleaning chamber (2) and the water basin (1) are connected by integral firing, welding or bonding.

4. The handwashing basin for cleaning hands using ultrasound according to claim 2, characterized in that: The cleaning chamber (2) is a cuboid or a cylinder.

5. The handwashing basin for cleaning hands using ultrasound according to claim 1, characterized in that: The cleaning chamber (2) is located inside the side wall above the overflow hole of the water basin (1), and the cleaning chamber (2) is connected to the water-containing chamber of the water basin (1) through the guide part (24).

6. The handwashing basin for cleaning hands using ultrasound according to claim 5, characterized in that: The cavity formed by extending from the inlet of the guide section (24) into the cleaning chamber (2) has an overall longitudinal section that is gradually curved downward in the shape of a spoon. The cleaning chamber (2) is connected to the first drain pipe (12) through the second drain pipe (23).

7. The handwashing basin for cleaning hands using ultrasound according to claim 6, characterized in that: The guide section (24) has sensors (25) on both sides of the entrance near the top wall for sensing the insertion of an object.

8. The handwashing basin for cleaning hands using ultrasound according to claim 7, characterized in that: The top wall of the cleaning chamber (2) is provided with a water spray pipe (22), which is connected to the water supply pipe of the faucet (11), and a solenoid valve is provided on the water supply pipe to control the on / off of the water spray pipe (22).

9. The handwashing basin for cleaning hands using ultrasound according to claim 5, characterized in that: The guide section (24) has a rectangular cross-section.

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