A dual-purpose cleaning and drying table

Abstract

The application discloses a dual-purpose table for preventing overflow during hand drying and washing, which comprises a washing system, the washing system comprising a water tank, a water outlet faucet, a water inlet pipe and a drain pipe, characterized in that the dual-purpose table further comprises a hand drying system, the hand drying system comprising a negative pressure cavity, a high-speed air outlet, an air inlet filter device and an air return mechanism, the negative pressure cavity being arranged above the water tank, the high-speed air outlet being arranged obliquely above the opening and being composed of an air outlet pipe crossing over the air return plates on both sides, the air inlet filter device comprising a fan, a high-efficiency air filter and a static pressure channel in communication with the air outlet pipe, and the air return mechanism comprising an air return opening, a water baffle and a sealing air tank. The application integrates the hand drying system and the washing system, avoids water droplet overflow under the negative pressure state and keeps the cleanliness of the surrounding environment from being destroyed.

Description

Technical Field

[0001] This invention relates to a handwashing station, and more particularly to a dual-purpose handwashing and drying station that prevents spillage. It is mainly used in cleanrooms or biological laboratories and other environments where clean hands are required, and can reduce the chance of contamination. Background Technology

[0002] Handwashing stations and hand dryers are common cleaning devices. Traditional hand dryers use positive pressure airflow, which means that contaminated water and airflow from handwashing can overflow from the work area and flow outside the device during the drying process. When the application scenario has strict environmental requirements, such as 1. medical operating rooms and sterile wards; 2. biological laboratories; 3. food processing workshops; 4. electronic cleanrooms; 5. the pharmaceutical industry, traditional equipment poses a potential risk of polluting the external environment.

[0003] To address the aforementioned issues, negative pressure hand dryers have emerged on the market, such as the fully automatic vacuum hand dryer for operating rooms (CN 112568769 A) published in Chinese invention patent application. This device includes a casing, with the front, rear, and top of the casing respectively designated as a hand drying area, a negative pressure fan area, and a functional area. The top of the functional area is a sealed space with an air inlet on the top cover. Several sensors and a fan with a heater are installed within the functional area. The hand drying area and the negative pressure fan area are located below the functional area at the front and rear, respectively. A perforated baffle is longitudinally arranged at the connection between the hand drying area and the negative pressure fan area. A suction baffle is installed behind the perforated baffle, and a negative pressure fan is installed at the rear end of the suction baffle. Several negative pressure fan exhaust ports are evenly distributed around the outer edge of the negative pressure fan. This technical solution solves the problem of contaminated airflow overflowing, preventing the spread of dust or germs.

[0004] However, the above-mentioned device is a standalone hand dryer and does not have a cleaning function. When cleaning and drying are separated into two parts, water droplets and secondary pollution will inevitably occur. Therefore, if we combine the two into one, that is, complete the cleaning and drying in the same device, we can avoid this problem. This is also the research direction of those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a washing and drying station that prevents spillage. Through structural improvements, it combines washing and drying functions, avoids secondary pollution, and better meets the needs of stringent requirements.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a wash and dryer dual-purpose table to prevent overflow, comprising a washing system including a water tank, a faucet, an inlet pipe, and a drain pipe. The faucet is located above the water tank and connected to the inlet pipe. A drain outlet is opened at the bottom of the water tank and communicates with the drain pipe. The system also includes a hand-drying system, comprising a negative pressure cavity, a high-speed air outlet, an air inlet filter, and a return air mechanism, wherein:

[0007] The negative pressure cavity is located above the water tank and includes two side return air plates, a top cover and a rear back plate, forming a semi-open chamber with an opening on one side, which is the working area. The opening is directly opposite the front side of the water faucet.

[0008] The high-speed air outlet is located diagonally above the opening and is composed of an air outlet pipe that spans the return air plates on both sides. The air outlet pipe is provided with a plurality of air outlets, which are inclined downwards. The air outlet pipe is connected to the air intake filter device.

[0009] The air intake filtration device includes a fan, a high-efficiency air filter, and a static pressure channel connected to the air outlet pipe. The air inlet of the fan corresponds to the air box of the return air mechanism. A row of air ducts is provided on the static pressure channel to discharge filtered clean airflow to the outside.

[0010] The return air mechanism includes a return air inlet, a baffle plate, and a sealed air box. The return air inlet is located on the back plate of the negative pressure cavity and connects to the sealed air box on the rear side. The baffle plate is located on the rear side of the back plate. The high-humidity airflow in the negative pressure cavity passes through the baffle plate from the return air inlet. After the high-humidity airflow is condensed, the air and water are separated. The airflow enters the air box, and the return water is guided into the water tank along the baffle plate.

[0011] In the above technical solution, the cleaning system and the hand drying system are both set in a box. The back side plate of the box has a water inlet and a water outlet, which are connected to the water inlet pipe and the drain pipe, respectively. The middle of the rear side of the box also has an exhaust port connected to the exhaust pipe. The bottom of the box has support feet. The box is a sealed structure, which constitutes the sealed air box of the return air mechanism.

[0012] In the above technical solution, the fan is installed in a fan mounting box, with an air inlet on one side facing outward and a heater installed at the air outlet on the other side facing inward. The high-efficiency air filter is located between the fan mounting box and the inlet of the static pressure channel, and the outlet of the static pressure channel is connected to the air outlet pipe.

[0013] In the above technical solution, the static pressure channel is a box-type pressure transformation channel that is wider at the bottom and narrower at the top, and a sloping constriction section is provided near the end of the air outlet pipe. The exhaust pipe is located in the middle section of the static pressure channel, and its port is provided with an adjustable valve.

[0014] In the above technical solution, the air outlet is a long strip-shaped slit or a plurality of round holes. When it is a round hole-shaped air outlet, the round hole air outlets are distributed at intervals on the air outlet pipe, and the opening of the air outlet faces downward into the working area with an inclination angle of 60° to 80°.

[0015] A further technical solution is that the air outlet pipe is a set of pipes, including a fixed inner pipe and a rotatable outer pipe. The fixed inner pipe has a first air outlet, and the rotatable outer pipe has a second air outlet. The air outlet tilt angle is obtained by adjusting the position of the second air outlet relative to the first air outlet.

[0016] In the above technical solution, the baffle plate includes a middle condensation zone, a lower inclined flow guiding zone and an upper opening. A return cavity is provided between the baffle plate and the back plate. The condensation zone and the flow guiding zone are respectively connected to the back plate through fixed flanges, and a heat insulation gasket is provided between the fixed flanges and the back plate. The upper opening is connected to the air box.

[0017] In the above technical solution, the top cover is a flip cover, including a top surface with a glass viewing window and a surrounding edging. The two side edgings are flush with the outer edge of the corresponding side return air panel. The front edging covers the outside of the air outlet duct, and the rear edging is connected to the back panel of the housing by a hinge.

[0018] The above technical solution includes an electrical control system, which includes a fan control circuit, a temperature control circuit, and a water outlet sensing control circuit. The main control panel of the electrical control system is located on the outer back panel of the enclosure.

[0019] A further technical solution is that the main control panel is equipped with adjustment buttons, including the water outlet duration, hand drying duration, and air blowing temperature. By adjusting the buttons, the corresponding parameters are set. The control process of the washing and hand drying system is as follows: when the water outlet senses that the hand is blocking the water, water is dispensed. After the water outlet has been dispensed for the specified duration, the water outlet is turned off. The electronic control system is set to delay for 1 second after the water stops, then the hand drying system is started. After the air blowing has been used to dry the hands for the specified duration, it automatically turns off. When the user leaves, the control system is reset.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] 1. This invention includes a washing system and a hand-drying system, integrating the two functions into a single device. The two systems operate independently, avoiding water droplets that may occur when changing equipment. Furthermore, the washing system employs a conventional sensor-activated water washing process. After washing, it automatically enters the hand-drying program. A fan draws air from the air chamber, purifies it through a high-efficiency air filter, and then forces it into a static pressure channel. The air is then blown out onto the work area through a high-speed exhaust pipe, drying the hands and arms. A return air mechanism redirects the contaminated, humid air back into the air chamber through the return air inlet. A negative pressure cavity above the water tank (where part of the filtered clean air is discharged through the exhaust pipe, and air is then replenished through the cavity opening to create negative pressure) prevents water droplets from overflowing during drying, thus preventing environmental pollution from the washed water.

[0022] 2. A water baffle is installed in the return air mechanism. It is made of metal sheet and fixed to the back of the working area by heat insulation pad. This prevents the heat of the box from being transferred to the water baffle through heat conduction. The water baffle is the lowest temperature point relative to the back panel. When the return air passes through the water baffle, the water vapor attached to the return air will condense on the water baffle. The condensed water droplets will flow back into the water tank inside the working area through the slope of the water baffle. This can effectively prevent high humidity airflow from flowing back into the air box, thereby ensuring the safety of the electrical components inside the box and improving the service life of each component.

[0023] 3. The air outlet on the air duct faces the work area and forms a certain angle with the horizontal direction. This angle allows the air blown by the hand drying system to be directed towards the drain of the water tank. During the hand drying process, the water droplets on the hands are quickly blown towards the drain of the water tank and discharged from the water tank, preventing water accumulated in the water tank from being blown up by the high-speed airflow and re-adhere to the user's hands, thereby helping to improve the efficiency of hand drying.

[0024] 4. A heater is installed inside the fan mounting box to heat the blown air, which can keep the blown air temperature at the set temperature value (around 38℃), achieving the function of quickly drying hands and providing users with a more comfortable experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the front structure of Embodiment 1 of the present invention (after removing the front side panel of the box).

[0026] Figure 2 yes Figure 1 A lateral schematic diagram;

[0027] Figure 3 yes Figure 1 Rear view diagram;

[0028] Figure 4 This is a schematic diagram of the rear structure of Embodiment 1 of the present invention (after removing the back panel of the box).

[0029] Figure 5 This is a schematic diagram of the hand-drying system structure in this invention;

[0030] Figure 6 This is a schematic diagram of the negative pressure cavity assembly structure in this invention;

[0031] Figure 7 This is a schematic diagram of the installation structure of the water baffle in this invention;

[0032] Figure 8 This is a schematic diagram of the air outlet structure in this invention;

[0033] Figure 9 This is a flowchart illustrating the usage process of Embodiment 1 of the present invention.

[0034] The components include: 1. Water tank; 2. Water tap; 3. Water inlet pipe; 4. Drain pipe; 5. Negative pressure cavity; 6. Return air panel; 7. Top cover; 8. Back panel; 9. Opening; 10. Air outlet duct; 11. Fan; 12. High-efficiency air filter; 13. Static pressure channel; 14. Exhaust duct; 15. Return air outlet; 16. Water baffle; 17. Housing; 18. Water inlet; 19. Water outlet; 20. Exhaust outlet; 21. Support legs; 22. Fan mounting box; 23. Heater; 24. Sloping tapered section; 25. Condensation area; 26. Air guide area; 27. Top opening; 28. Thermal insulation pad; 29. ​​Glass viewing window; 30. Edge banding; 31. Main control panel; 32. Fixed flange; 33. Condensed water droplets. Detailed Implementation

[0035] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Furthermore, the terms "vertical," "horizontal," "top," "bottom," "front," "back," "upper," "lower," "inner," and "outer," etc., mentioned in the embodiments of the present invention, indicate orientation or positional relationships based on the appendix. Figure 1 The orientations or positional relationships shown, or the orientations or positional relationships in which the product is usually placed during use, are only for the purpose of facilitating the description of the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. The following will refer to the appendix... Figure 1-9 The present invention will be described in detail with reference to the embodiments.

[0036] Example 1: See Figures 1-9 As shown, a washing and drying stand that prevents spillage includes a washing system and a drying system. The washing system includes a water tank 1, a water tap 2, a water inlet pipe 3, and a drain pipe 4. The water tap 2 is located above the water tank 1 and is connected to the water inlet pipe 3. A drain outlet is opened at the bottom of the water tank 1 and is connected to the drain pipe 4. The water tap 2 is sensor-operated, and water is dispensed after the sensor is blocked. The water is dispensed continuously for a set time and then automatically turns off.

[0037] The hand drying system includes a negative pressure cavity 5, a high-speed air outlet, an air inlet filter, and a return air mechanism. The negative pressure cavity 5 is located above the water tank 1 and includes two return air plates 6, a top cover 7, and a rear back plate 8, forming a semi-open chamber with an opening 9 on one side, which is the working area. The opening 9 is directly opposite the front side of the water faucet 2.

[0038] The high-speed air outlet is located diagonally above the opening 9 and is composed of an air outlet pipe 10 that spans the return air plates 6 on both sides. The air outlet pipe 10 is provided with a plurality of air outlets 11, which are inclined downwards. The air outlet pipe 10 is connected to the air intake filter device.

[0039] The air intake filtration device includes a fan 11, a fan inlet, a coarse air filter, a high-efficiency air filter 12, and a static pressure channel 13 connected to the air outlet duct 10. The air inlet of the fan 11 corresponds to the air box of the return air mechanism. A row of air ducts 14 is provided on the static pressure channel 13 to discharge filtered clean airflow to the outside.

[0040] The return air mechanism includes a return air inlet 15, a baffle plate 16, and a sealed air box. The return air inlet 15 is located on the back plate 8 of the negative pressure cavity 5 and is connected to the sealed air box on the rear side. The baffle plate 16 is located on the rear side of the back plate 8. The high-humidity airflow in the negative pressure cavity 5 passes through the baffle plate 16 from the return air inlet 15. After the high-humidity airflow is condensed, the air and water are separated. The airflow enters the air box, and the return water is guided into the water tank 1 along the baffle plate 16. The return air inlet 15 is also a return outlet, and the return water flows back to the water tank 1 from here.

[0041] like Figure 1 , 2 As shown, both the cleaning system and the hand-drying system are housed within a housing 17. The back panel of the housing 17 has a water inlet 18 and a water outlet 19, which are connected to the water inlet pipe 3 and the drain pipe 4, respectively, leading to the outside of the equipment. The housing 17 also has an exhaust port 20 in the middle, connected to the exhaust pipe 14. The bottom of the housing 17 has support feet 21. The housing 17 is a sealed structure, forming the sealed air box of the return air mechanism.

[0042] Alternatively, an independent sealed air box, such as a sealed bag, can be used. The flexible material can avoid the water inlet and drain pipes under the water tank, or other forms of sealing structure can be used, as long as the airflow is drawn in from the return air inlet and then introduced into the fan. It is not limited to the graphic structure shown in the attached drawings of this embodiment.

[0043] like Figure 2 , 5As shown, the fan 11 is installed in a fan mounting box 22, with an air inlet on one side facing outwards and a heater 23 installed on the other side facing inwards. The high-efficiency air filter 12 is located between the fan mounting box 22 and the inlet of the static pressure channel 13. The outlet of the static pressure channel 13 is connected to the outlet pipe 10. The static pressure channel 13 is a box-type pressure-changing channel that is wider at the bottom and narrower at the top. Near the end of the outlet pipe 10, there is a sloping constriction section 24, which can increase the airflow velocity by using the slope to form a high-speed airflow. The exhaust pipe 14 is located in the middle section of the static pressure channel 13, and its port is equipped with an adjustable valve. The amount of airflow discharged is adjusted by the valve, thereby adjusting the negative pressure state of the negative pressure cavity 5.

[0044] like Figure 8 As shown, the air outlet 11 is a long, narrow slit (width can be selected as 2mm) or a plurality of round holes. When it is a round hole air outlet, the round hole air outlets are distributed at intervals on the air outlet pipe 10. The air outlet opening faces downward into the working area, and the tilt angle is 60° to 80°, which can be set to 75°.

[0045] Alternatively, an adjustable type with adjustable angle and air outlet size can be selected. For example, the air outlet pipe 10 is a set of pipes, including a fixed inner pipe and a rotatable outer pipe. The fixed inner pipe has a first air outlet, and the rotatable outer pipe has a second air outlet. The air outlet tilt angle can be obtained by adjusting the position of the second air outlet relative to the first air outlet. The size of the air outlet can also be adjusted. Different air outlets can meet the needs of different users and are more flexible.

[0046] like Figure 7 As shown, the baffle plate 16 includes a middle condensation zone 25, a lower inclined flow guide zone 26, and an upper opening 27. A return flow cavity is provided between the baffle plate 16 and the back plate 8. The condensation zone 25 and the flow guide zone 26 are respectively connected to the back plate 8 through a fixed flange 32, and a heat insulation gasket 28 is provided between the fixed flange 32 and the back plate 8. The upper opening 27 is connected to the air box. The return water (flow) plate is made of metal sheet and is fixed to the back of the working area through the heat insulation gasket to block the heat of the box from being transferred to the return water (flow) plate through heat conduction. Since the return air plate 16, water tank 1, sensor faucet, and other metal parts inside the working area are all connected to the metal box, the heat of the heater 23 inside the fan mounting box 22 will be transferred to the working area through heat conduction. Therefore, the temperature of the return water (flow) plate is lower than that of the metal components inside the working area, and it has a stronger condensation effect. When the return air passes through the condensation zone 25, the water vapor attached to the return air will condense on the plate. The condensed water droplets 33 will flow back to the water tank 1 inside the working area through the slope of the guide zone 26, and be discharged outside the equipment through the drain pipe 4. This can effectively ensure that there is no high humidity airflow flowing back into the box 17, thereby ensuring the safety of the electrical components inside the box.

[0047] like Figure 1, 2 As shown, the top cover 7 is a flip cover, including a top surface with a glass viewing window 29 and a surrounding edge 30. The two side edges 30 are flush with the outer edge of the corresponding side return air plate 6. The front edge covers the outside of the air outlet duct 10, and the rear edge is connected to the back side plate of the housing 17 by a hinge.

[0048] In this embodiment, an electrical control system is also included. This system comprises a fan control circuit, a temperature control circuit, and a water outlet sensing control circuit. The main control panel 31 of the electrical control system is located on the outer rear side panel of the housing 17. The entire equipment's operation is controlled by the electrical control system as follows:

[0049] The main control panel is equipped with adjustment buttons, including the water flow time of the faucet, the hand drying time, and the air blowing temperature. By adjusting these buttons, the corresponding parameters are set. The control process of the washing and hand drying system is as follows: Figure 9 As shown, when the faucet senses a hand blocking the water flow, it will dispense water and then shut off after a certain duration. The electrical control system is set to delay for 1 second after the water stops, then activate the hand-drying system. After the blower dries the hands for the specified duration, it will automatically shut off. Once the user leaves, the control system will reset.

[0050] The equipment uses a high static pressure special fan, which can make the hand dryer blow out air at a speed of about 100m / s. The blown air is heated by a heater installed inside the fan mounting box, which can keep the blown air temperature at 38℃, achieving the function of quickly drying hands, with a drying efficiency of up to 99% in 20 seconds.

[0051] Explanation of the principle for preventing overflow: The fan 11 draws return air into the sealed housing 17, purifies it through the high-efficiency air filter 12, and then pressurizes it into the static pressure channel 13. The air is then blown into the working area (within the negative pressure cavity) through the high-speed air outlet installed at the top. The airflow then flows back to the fan from the return air / return port at the back of the working area (this is the only pressure relief and discharge channel), forming an airflow circulation. Because the static pressure channel 13 is equipped with an exhaust pipe 14, the airflow within the static pressure channel 13 is discharged outside the equipment through the exhaust port. Therefore, the system replenishes the working area with airflow from outside the equipment, thus creating a negative pressure state in the working area. The replenished airflow (intake air) prevents contaminated water from washing hands and contaminated airflow from blowing on hands from overflowing the working area, thereby protecting the surrounding environment.

[0052] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A spill-proof washing and drying station, comprising a washing system including a water tank, a water tap, an inlet pipe, and a drain pipe, wherein the water tap is located above the water tank and connected to the inlet pipe, and a drain outlet is provided at the bottom of the water tank and communicates with the drain pipe, characterized in that: It also includes a hand-drying system, which comprises a negative pressure cavity, a high-speed air outlet, an inlet air filter, and a return air mechanism, wherein: The negative pressure cavity is located above the water tank and includes two side return air plates, a top cover and a rear back plate, forming a semi-open chamber with an opening on one side, which is the working area. The opening is directly opposite the front side of the water faucet. The high-speed air outlet is located diagonally above the opening and is composed of an air outlet pipe that spans the return air plates on both sides. The air outlet pipe is provided with a plurality of air outlets, which are inclined downwards. The air outlet pipe is connected to the air intake filter device. The air intake filtration device includes a fan, a high-efficiency air filter, and a static pressure channel connected to the air outlet pipe. The air inlet of the fan corresponds to the air box of the return air mechanism. A row of air ducts is provided on the static pressure channel to discharge filtered clean airflow to the outside. The return air mechanism includes a return air inlet, a baffle plate, and a sealed air box. The return air inlet is located on the back plate of the negative pressure cavity and is connected to the sealed air box on the rear side. The baffle plate is located on the rear side of the back plate. The high-humidity airflow in the negative pressure cavity passes through the baffle plate from the return air inlet. After the high-humidity airflow is condensed, the air and water are separated. The airflow enters the air box, and the return water is guided into the water tank along the baffle plate. The baffle plate includes a middle condensation zone, a lower inclined flow guiding zone and an upper opening. A return cavity is provided between the baffle plate and the back plate. The condensation zone and the flow guiding zone are respectively connected to the back plate through fixed flanges, and a heat insulation gasket is provided between the fixed flanges and the back plate. The upper opening is connected to the air box.

2. The anti-overflow washing and drying dual-purpose table according to claim 1, characterized in that: The cleaning system and the hand drying system are both housed in a box. The back panel of the box has a water inlet and a water outlet, which are connected to the water inlet pipe and the drain pipe, respectively. The middle of the rear side of the box also has an exhaust port connected to the exhaust pipe. The bottom of the box has support feet. The box is a sealed structure, forming the sealed air box of the return air mechanism.

3. The anti-overflow washing and drying table according to claim 1, characterized in that: The fan is installed in a fan mounting box, with an air inlet on one side facing outwards and a heater installed at the air outlet on the other side facing inwards. The high-efficiency air filter is located between the fan mounting box and the inlet of the static pressure channel, and the outlet of the static pressure channel is connected to the air outlet pipe.

4. The spill-proof washing and drying station according to claim 1 or 3, characterized in that: The static pressure channel is a box-type pressure-changing channel that is wider at the bottom and narrower at the top. It has a sloping constriction section near the end of the air outlet pipe. The exhaust pipe is located in the middle section of the static pressure channel and has an adjustable valve at its port.

5. The anti-overflow washing and drying table according to claim 1, characterized in that: The air outlet is either a long, narrow slit or a plurality of round holes. When it is a round hole air outlet, the round holes are spaced apart on the air outlet pipe. The air outlet opening faces downward into the working area, with an inclination angle of 60° to 80°.

6. The spill-proof washing and drying station according to claim 5, characterized in that: The air outlet duct is a set of pipes, including a fixed inner pipe and a rotatable outer pipe. The fixed inner pipe has a first air outlet, and the rotatable outer pipe has a second air outlet. The air outlet tilt angle is obtained by adjusting the position of the second air outlet relative to the first air outlet.

7. The anti-overflow washing and drying dual-purpose table according to claim 1, characterized in that: The top cover is a flip cover, including a top surface with a glass viewing window and a surrounding edging. The two side edgings are flush with the outer edge of the corresponding side return air panel. The front edging covers the outside of the air outlet duct, and the rear edging is connected to the back panel of the housing by a hinge.

8. The anti-overflow washing and drying table according to claim 1, characterized in that: It includes an electrical control system, which includes a fan control circuit, a temperature control circuit, and a water outlet sensing control circuit. The main control panel of the electrical control system is located on the back side panel of the outer casing.

9. The spill-proof washing and drying station according to claim 8, characterized in that: The main control panel is equipped with adjustment buttons, including the water flow duration of the faucet, the hand drying duration, and the air blowing temperature. By adjusting the buttons, the corresponding parameters are set. The control process of the washing and hand drying system is as follows: when the faucet senses that the hand is blocking the water, it dispenses water. After maintaining the water flow for the specified duration, it shuts off the water. The electronic control system is set to delay for 1 second after the water stops, then starts the hand drying system. After maintaining the hand drying duration, the air blowing system automatically shuts off. When the user leaves, the control system resets.

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