A bathing method and bathing device based on the principle of turbulent flow

Abstract

The application discloses a bathing method and device based on the principle of turbulent flow, and belongs to the technical field of bathroom. The bathing method adopts a lying posture to perform bathing in a bathtub, and a person being bathed is suspended in water, and layered bathing wipes in the water wrap the person being bathed, and the person being bathed is washed by using a wave wheel to excite turbulent flow. The bathing device comprises a cylinder body, a sinking cylinder cover and a headrest. At least two pairs of wave wheels that are relatively arranged and cooperatively rotate are arranged on the first wave wheel group at the bottom of the cylinder body and the second wave wheel group at the lower part of the cylinder cover. A deck chair, a bathing wipe and a flow guide strip are arranged between the wave wheel groups, and the deck chair is slightly inclined and in a hollow net-shaped or honeycomb structure. According to the scheme, the bathing wipe is rubbed and rubbed on the human body surface by the turbulent flow, and the bathing effect is achieved by friction. Since the contact area between the bathing wipe and the human body is large and uniform, the kinetic energy transmission distance of the wave wheel is short, and the water body flow response is fast. Therefore, the washing degree is better than that of other water flow bathing methods, water can be saved, sauna, drying and disinfection can be realized, the lying posture bathing process is comfortable and intelligent, and the method is especially friendly to disabled old people.

Description

Technical Field

[0001] This invention relates to the field of sanitary bathing equipment technology, specifically to a bathing method and device based on the principle of turbulence. Background Technology

[0002] With the increasing severity of population aging, specialized care institutions and equipment will have a broad market space, among which bathing for the elderly is a key aspect of elderly care. The purpose of bathing is to remove sweat and dirt from the body. Dirt mainly consists of aged skin tissue, dust mixed with sweat, etc., which has a strong adhesion to the skin and cannot be easily removed by detergents and water. Therefore, deep bathing services such as scrubbing and body scrubbing have emerged in life; however, body scrubbing services are expensive and lack privacy, while self-bathing is time-consuming and laborious, especially inconvenient for the elderly. Consequently, various automatic bathing devices have emerged on the market. For example, the human body bathing machine with authorization announcement number CN 2491013Y discloses a bathing method and ultrasonic bathing device based on the principle of ultrasound, equipped with an ultrasonic plate to generate high-frequency vibration, and uses water as a medium to clean and care for human skin. There are also bathing devices that use jet rinsing, such as a smart home bathtub massage device and control method with application number 202010825716.0, which achieves the effect of automatic bathing by spraying water.

[0003] The two devices mentioned above solved the difficulties of manual scrubbing during bathing, but the friction coefficient between the water medium and the human body surface is very small, and the water flow is mostly laminar, making it difficult to directly remove dirt from the body and resulting in low cleanliness. Therefore, bathing devices that use a pulsator to drive the water flow and move a bath ball for bathing have emerged; such as application number 202510007739.3 and authorization announcement number CN208371703. The U-shaped technical solution utilizes an impeller to drive water flow, which in turn moves a bath sponge to rinse the skin. The introduction of a solid medium effectively improves the friction and cleanliness of the wash. However, the single impeller primarily generates laminar flow in both forward and reverse directions, with only brief, large-area turbulence occurring at the moment of switching between directions. This short-lived turbulence prevents full utilization of the water's kinetic energy. Secondly, the aforementioned bathing requires a squatting or sitting posture, which is not a comfortable position, especially for disabled elderly individuals who find it difficult to maintain this posture during bathing. Furthermore, squatting or sitting positions require greater water depth. Since the impeller is installed at the bottom, using a low-power impeller to drive the entire tank of water would be problematic. The transfer of kinetic energy from the bottom to the top of the water flow takes a relatively long time, making it impossible to frequently change the direction of the impeller. Therefore, the water flow used in the above-mentioned bathing device is mainly downstream. Downstream flow is not conducive to the bath ball flowing towards the center to generate friction with the human skin. Instead, it only generates a small amount of oblique friction with the human skin along the tangential direction. Moreover, more than 70 years of practice of impeller washing machines has verified that the cleaning effect of downstream washing is far lower than that of turbulent washing. If a high-power impeller is used, it can generate a more intense water surge. However, under the action of intense water flow, it is more difficult to maintain a stable squatting or sitting posture. Furthermore, the intense water flow will make the bath ball move more violently, which may damage the human skin.

[0004] In view of the above-mentioned defects, the automatic bathing machine and its automatic bathing method based on the principle of tumbling and polishing, authorized by announcement number CN112137476B, discloses that by driving abrasives with water flow through a water pump to contact the skin, the contact area between the solid medium and the human skin is increased, thus improving the bathing effect. However, the regularity and range of water flow make it difficult for the abrasives to form effective friction with the skin, resulting in incomplete cleaning and inconvenience in collecting and storing the abrasives. At the same time, technical solutions that use mechanical principles to replace water flow to contact the human skin have also emerged. For example, a rotary automatic scrubbing machine authorized by announcement number CN114947586B discloses that "the scrubbing disc can tilt according to the curve of the human body under the combined action of spring and the pressure of the human back, thereby improving the fit during the scrubbing process," which solves the problem of effective area and force of contact and friction between the solid medium and the human body surface. However, this technical solution has too small a friction area and a large limitation on the bathing area.

[0005] In summary, each significant advancement in bathing methods has been accompanied by updates to the bathing techniques and changes to the structure of bathing devices. Among the publicly disclosed bathing methods and devices, no optimized combination technology based on turbulence principles and bath scrubbers and related devices has emerged. Furthermore, research on combining turbulence with human bathing in engineering applications is also lacking. Existing technologies still primarily use laminar flow as the main fluid state in the bathing process, with water as the medium. Very few disclosed technologies use bath balls or abrasive powder as the medium, and turbulence has not yet been effectively captured and utilized. Fluid mechanics research indicates that turbulence contributes the most to cleanliness, followed by countercurrent, while cocurrent contributes the least. Turbulent fluids exhibit irregular, chaotic vortex and eddy state, high Reynolds numbers, and large velocity gradients, requiring high rotational speeds, rapid switching between forward and reverse directions, water collisions, and superposition to create the conditions for turbulence formation. Therefore, this invention aims to optimize the conditions for turbulence generation, utilization methods, bathing posture, and bathing wiping distribution within the same system. One objective of this invention is to provide a bathing method based on the principle of turbulence that aims to effectively acquire and utilize the kinetic energy of water flow. Another objective is to provide a bathing device that is compatible with the bathing method, providing a comfortable bathing process, good cleaning effect, and high cleaning rate. Summary of the Invention

[0006] Based on the principle of turbulence, this invention optimizes the conditions of bathing posture, bathing kinetic energy, and scrubbing medium to provide a bathing method that is comfortable, effective, and efficient.

[0007] The bathing method based on turbulence principles proposed in this solution includes the following technical features: This bathing method involves bathing in a lying position in a bathtub, with the person being bathed suspended in the water by an auxiliary support structure. During bathing, one impeller rotates clockwise and the other counterclockwise, shearing the water to form at least two rotating water flow zones that spread outwards from the impeller center. Both zones continuously spread outwards and collide. The outward diffusion speed of the two rotating water flow zones is regulated by controlling the impeller rotation speed. Through collisions, the Reynolds number reaches the Re threshold or above, continuously generating turbulence with a normal radial splitting pattern between the two impellers, which serves as the primary kinetic energy. The centrifugal eddies generated by the water flow along the tangential direction outside the two impellers colliding with the inner wall of the bathtub, and the vortex-like turbulence generated by the axial rotating water flow of the two impellers, serve as secondary kinetic energy, providing effective and beneficial kinetic energy for bathing. Alternatively, a mode where both impellers rotate clockwise can be used to create a gentler water flow, suitable for selecting bathing intensity and cleaning programs.

[0008] The impellers are arranged in pairs, with at least two sets facing the front and back of the person being bathed, respectively. Each set has at least one pair of impellers. If two or more pairs are arranged, the impellers are evenly arranged along the height of the person. Each pair of impellers rotates within its corresponding range to create turbulence. Several turbulences combine to form a turbulence circle, which surrounds the person being bathed. This effectively increases the range of turbulence and the contact and friction area with the human body surface, further eliminating dead corners during bathing. Bath scrubbers are distributed in layers in the water, consisting of at least an upper and a lower layer. When the bath is static, the upper and lower layers of bath scrubbers envelop the bather's body; when the bath is dynamic, the upper and lower layers of bath scrubbers move around the body with the water flow, rubbing and washing the bather's skin.

[0009] The impeller blades are set as shown in the attached diagram. Figure 2 The blade's shape and structure feature opposing water flow surfaces on both sides, designed to shear the water. As the impeller rotates in both directions, the water sheared by the blades disperses along the impeller's tangential direction, forming a rotating flow zone that rotates along the impeller's center and spreads outwards. The downward-sloping section on the left side of the blade is semi-circularly cut to form an axial vortex facing surface, used to disturb the water. When the impeller rotates, the water disturbed by this axial vortex facing surface forms an axial vortex (i.e., a spiraling vortex forms at the impeller's center along the impeller's axis). The area ratio of the opposing water flow facing surface to the axial vortex facing surface is approximately 8 / 2. The blades are arranged radially, with 2 to 6 blades selected to ensure sufficient intensity of the outwardly spreading rotating flow and the spiraling vortex.

[0010] Furthermore, in larger bathing environments or under conditions of reduced impeller size and drive power, the number of impellers in a pair can be increased. Multiple impellers can be arranged in a rectangular or square array. This configuration can superimpose the turbulent energy generated between the pairs of impellers, which is the same as that between the pairs of impellers mentioned above.

[0011] Furthermore, adjusting the impeller speed can change the outward diffusion velocity of the rotating water flow, thereby altering the collision intensity of the two rotating water flows and the intensity of the axial water flow vortex. By adjusting the speed of the paired impellers, the Reynolds number of the colliding water flow and the axial water flow vortex can be adjusted to the Re threshold or above, allowing the normal radial split, centrifugal disturbance vortex, and vortex to selectively enter a turbulent or strongly turbulent state.

[0012] Furthermore, adjusting the speed difference between the paired impellers can change the ratio of the outward diffusion velocities of the two rotating water streams, thereby altering the perpendicularity of the normal radial flow acting on the corresponding human body surface. Simultaneously, it allows the normal radial flow to move between the two impellers, increasing the turbulence coverage area. Periodically adjusting the speed difference between the paired impellers causes the normal radial flow to periodically move between the impellers and change its angle relative to the human body surface during bathing, while the intensity of the vortex along the impeller axis also changes periodically.

[0013] Furthermore, the bath sponge includes a sponge layer, a rough mesh covering the surface of the sponge layer, and a bath ball filled within the sponge layer; using the soft sponge as a medium to absorb turbulent energy and then apply it to the body of the bather can increase the coefficient of friction and effectively improve the cleaning effect; the bath ball is harder than the sponge layer, which can increase the pressure of the bath sponge in contact with the bather, while the sponge has a cushioning effect that can reduce the discomfort of the bath ball hitting the body.

[0014] Furthermore, the bath sponge is filled with several bath balls. The bath balls in the same bath sponge are divided into multiple density series. The overall density of the bath sponge is divided into two series, corresponding to the upper and lower layers of the bath sponge respectively. Due to the uneven density distribution of the bath sponge, the bath balls within it have different densities, resulting in different inertial forces. When the bath sponge collides with the body, it will roll on the skin, thereby increasing the friction with the skin.

[0015] Furthermore, the ratio of the bather's skin area to the total area of ​​the bathing area is 1 / 1.5-1 / 2.

[0016] Furthermore, the vertical distance between the impeller blades and the corresponding area of ​​the human body surface is 8-20 cm.

[0017] Furthermore, before turbulent bathing, a downstream flow is formed by the simultaneous rotation of paired impellers at low to medium speeds in opposite directions or by the rotation of only one impeller, thus performing downstream bathing.

[0018] Based on the above-mentioned technical concept of bathing method based on turbulence principle, a bathing device based on turbulence principle is proposed to solve the problems of tiring, difficult and poor bathing experience.

[0019] The bathing device implementing the above-mentioned turbulence-based bathing method includes a bathtub body, a first impeller assembly located at the bottom of the inner wall of the bathtub body, a reclining chair positioned above the impellers, and a bath sponge that flows with the water. The first impeller assembly consists of multiple impeller pairs, each pair including at least two impellers whose rotational speed and direction can be independently controlled. The bath sponge includes a sponge layer and bath balls of various diameters encased within the sponge layer. The reclining chair has a perforated honeycomb or mesh structure, and the area of ​​the bath sponge is larger than the individual perforations on the reclining chair to prevent the bath sponges distributed above and below the reclining chair from moving around, thus dividing the bath sponge into an upper and lower layer. The bather lies on a reclining chair, which provides some support. The reclining chair is openwork, and the rotating impeller pushes and shears the water to form a rotating water flow zone that rotates along the center of the impeller and spreads outward. The impeller continuously spreads outward and collides with at least two rotating water flow zones to generate turbulence. The bather's chest, back, and legs are subjected to the rolling and friction of the turbulent water flow, which has the effect of rubbing and washing the bather's skin.

[0020] Furthermore, it also includes a bathtub lid, which is used to cover and seal the bathtub body. The bathtub lid has a neck opening for the neck to protrude, and there is an expandable and contractible sealing ring at the neck opening. The closing of the bathtub lid and the expansion of the sealing ring to fit the neck can prevent bath water from overflowing the bathtub body during bathing. Of course, the bathing device in this solution can also be equipped with sauna, drying and other functions, in which case the sealing ring at the bathtub lid and neck opening can also prevent steam and hot air from escaping.

[0021] Furthermore, the inner wall of the bathtub lid is equipped with a second impeller assembly opposite to the first impeller assembly at the bottom of the bathtub body. The impellers of the second impeller assembly are all embedded and fixed to the inner wall of the bathtub lid, used to create turbulence in the upper layer of the bathtub. The first impeller assembly is mainly used to create turbulence in the lower layer of the bathtub, thus forming two opposing turbulence activity areas on the two main bathing surfaces, represented by the chest and back. Specifically, impeller pairs can be arranged sequentially on the abdomen, buttocks, front of the lower limbs, and back of the lower limbs as needed to correspondingly form areas of dense turbulence activity, improving the evenness of washing. When the bathtub lid is closed, the inner wall of the bathtub lid in the area where the second impeller assembly is located sinks below the highest water level line of the bathtub body; that is, the bathtub lid has a sunken structure, with the inner wall of the bathtub lid sinking from the head towards the legs, the sinking slope parallel to the axis of the body while lying down, maintaining a distance of about 20 cm from the body, and the sunken part of the bathtub lid is waterproofed. When the bathtub lid is closed, the inner wall of the lid sinks directly into the bathtub body, blocking the upper space of the area where the impeller is located. As a result, the turbulence generated by the second impeller cannot surge upward, but can only be transmitted downward towards the skin surface.

[0022] Furthermore, multiple showerheads are installed on the inner wall of the bathtub cover to spray bathing water, or hot air for drying, or hot steam for sauna.

[0023] Furthermore, a safety guard is installed on the outer side of the impeller blades. The guard can increase the protection function and prevent bathers from contacting the rotating impeller. At the same time, the guard will not obstruct the flow of water.

[0024] Furthermore, the bathtub also includes a headrest cover, which is hinged to one end of the bathtub body; when the headrest cover is open, it can be used as a pillow, and when the headrest cover is closed, it cooperates with the bathtub cover to seal the neck opening.

[0025] Furthermore, the headrest cover is composed of an inner wall and an outer wall. The side supporting the head of the person bathing is the inner wall, and the opposite side is the outer wall. The two are combined inside the headrest cover to form a cavity; the cavity is a concentrator and distributor of clean water and hot air. The inner wall is equipped with several identical spray pipes that both deliver clean water and hot air, and one identical injection pipe for delivering shampoo. One end of the spray pipe is fixed to the outer wall, and the other end penetrates the inner wall, thus reinforcing the headrest cover. The spray pipe connects to the cavity, which is connected via pipelines to a solenoid valve that connects to a controllable water source and a controllable hot air blower. By switching the solenoid valve, the spray pipe can spray clean water or blow hot air. The injection pipe is connected via pipelines to a controllable shampoo storage tank to extract shampoo; thus, shampooing, washing, and drying functions can be completed. The end of the spray pipe extending from the inner wall is elastic; when shampooing, the movement of the head creates a scratching effect on the hair, simultaneously achieving a scalp massage effect.

[0026] Furthermore, the overall density of the upper bath sponge is greater than that of water. When static, the bath sponge sinks and covers the front of the bather. The overall density of the lower bath sponge is equal to or less than that of water. When static, the bath sponge floats and covers the back of the bather. When dynamic, the upper bath sponge tends to move towards the front of the bather, while the lower bath sponge tends to move towards the back of the bather, thus enveloping the bather.

[0027] Furthermore, the bath ball is made of rigid polyvinyl chloride and is hollow inside, and the density of the bath sponge can be controlled by injecting water into the bath ball.

[0028] Furthermore, the bath balls include three diameter series: large, medium, and small. The large diameter bath balls have a diameter of 20-30mm, the medium diameter bath balls have a diameter of 10-20mm, and the small diameter bath balls have a diameter of 5-10mm. By using bath balls of different diameters, different contact surfaces and touching intensities are provided to the skin, which can enhance the massage and cleansing effects.

[0029] Furthermore, the section of the recliner opposite the backrest is an inclined section with an inclination angle of 15°-30° to improve comfort, and the axes of the first and second pulsator groups opposite the inclined section are perpendicular to the inclined section.

[0030] Furthermore, the guide strips are installed on both sides of the inner wall of the bathtub body. The guide strips are symmetrically distributed along the human body axis to form an upper guide strip and a lower guide strip. The upper guide strip guides the water downward, and the lower guide strip guides the water upward. Under the guiding effect of the guide strips, the water flow is disturbed, and the bath sponge tends to move towards the human body with the water flow or turbulence, causing the bath sponge to surge around the human body with the water flow.

[0031] Furthermore, a bath liquid delivery pipe is connected to the bathtub inlet pipe near its end via a T-junction. The delivery pipe is connected to a metering pump in the controllable bath liquid storage box. Activating the metering pump can directly deliver bath liquid into the bathtub.

[0032] Furthermore, the bathing device also includes a controller, a microphone, a control screen, and a data storage module. The impeller, microphone, control screen, and data storage module are all connected to the controller. The microphone is used to collect voice signals, the control screen serves as an interactive panel, allowing users to adjust bathing parameters and set custom modes. The data storage module stores bathing data. During the execution of the custom mode, bathing parameters can be adjusted according to the bather's preferences. Using the stored bathing data as input, AI intelligent learning can optimize the custom mode, thereby improving bathing comfort and experience based on the bather's preferences. Through repeated iterations, targeted bathing habits for the bather can be formed.

[0033] The beneficial effects of this plan are as follows: This solution utilizes turbulence as the primary beneficial kinetic energy during bathing. Compared to laminar flow formed by co-current and counter-current, turbulence offers a superior cleansing effect. During a bath, the laminar flow typically contacts the body surface at an angle parallel to the body, flowing past it with extremely low friction, failing to generate turbulence. Even when water directly impacts the body, due to high viscosity and low inertia (generally a Reynolds number Re less than 1200), the water pressure makes it difficult to generate eddies, and the flow remains co-current. Generating eddies and turbulence would necessitate increased power and impeller speed, raising the Re value to over 2300. The resulting enhanced turbulence would be unbearable for the body. Therefore, current technologies such as water pump jets and water gun sprays primarily utilize laminar flow without generating significant turbulence.

[0034] This solution employs a low-power, low-noise impeller to propel and shear the water, creating at least two rotating flow zones that radiate outwards from the impeller's center. Both zones continuously expand outwards and collide, generating numerous turbulent vortices and centrifugal eddies, including axial vortex-like turbulence generated by the impeller's own rotation. Within this flow field, the water flow is transformed into turbulence through collisions, changing from an uncomfortable and harmful state of linear impact to a comfortable and beneficial state of contact, friction, and gentle caressing from the swirling, rolling turbulence. Specifically, when the rotating water flow generated by the impellers collides outwards, it creates fluid tumbling, vortices, and turbulent eddies, forming turbulence. The rotating water flow also generates radial splitting along the collision surface, forming turbulent jets. These jets have a strong entrainment effect at their edges, drawing in surrounding media such as bath sponges, further intensifying turbulent disturbances. By adjusting the impellers' power, rotational speed, and other parameters, the bath sponge can tumble and roll within an optimal depth of 3-8 cm, absorbing turbulent energy and then transferring and releasing it to the body. By configuring impellers in pairs, optimizing the impeller blades, and applying them to the bathing process, a kinetic energy mode characterized by turbulence—specifically, radial splitting, axial water vortices, and centrifugal turbulent eddies—is introduced into the bathing field, creating a new bathing method. Turbulence, once a daunting and poorly understood phenomenon, now possesses a rational, economical, and feasible utilization mechanism. Therefore, a bathing method and device based on the principle of turbulence offers significantly higher cleaning efficiency, a more comfortable feel, and shorter processing time. Secondly, since turbulence is generated by the collision of two continuously outward-spreading rotating water streams, the kinetic energy released by this turbulence is the normal radial splitting of the two rotating water streams at the collision point, which is closer to being perpendicular to the human body. The rolling water waves cause the bath sponge to surge, multiplying the frequency of contact between the bath sponge and the human body. Furthermore, the angle of contact between the turbulence and the human body can be adjusted by configuring the axial direction of the impeller to make the plane of the rotating water stream as parallel to the skin surface as possible, thereby making the turbulence rolling direction as perpendicular to the human body surface as possible, thus increasing the contact force between the bath sponge and the human body. Thirdly, the optimal range of turbulent kinetic energy falls within the distance between the impeller and the human body surface, allowing for effective and full utilization of energy with a high energy conversion rate. Fourth, the bath sponge is a solid, flexible medium. Turbulent flow propels the sponge into contact with the body. The coefficient of friction between a solid, flexible medium and the body is much greater than that between a fluid medium and the body. Therefore, the sponge's intervention creates a more effective scrubbing effect, significantly improving cleaning efficiency. Simultaneously, the sponge, using a flexible medium, effectively absorbs turbulent energy during the turbulent flow and releases it back onto the body, acting as a "buffer" against the turbulent energy. This transforms the impact of the sponge against the body into effective rubbing and friction, improving cleaning power and enhancing both cleanliness and comfort. Fifth, the recessed bathtub cover reduces water consumption, thus saving water.

[0035] The beneficial effects of this plan are also manifested in the following ways: Turbulence is formed by the collision of rotating water flows that originate from two impellers, rotating around their centers and spreading outwards. Because the water flows in these two continuously spreading rotating zones influence and collide, creating surges, the water creates repeated surging impacts on the skin. In contrast, downstream flow creates less turbulence and is gentler. Secondly, within a confined space, downstream flow exhibits centrifugal force, resulting in more intense flow at the outer edges and slower flow at the center. Since the body remains stationary during bathing, it cannot fully concentrate in the area of ​​intense flow, leading to less uniformity in downstream bathing. Turbulence, on the other hand, exhibits more variation in its flow pattern, resulting in better uniformity. Because downstream bathing is gentler in intensity and has a soothing effect on the body, a brief downstream bath before using turbulent water can help relax the body.

[0036] The bathing method based on the principle of turbulence is conceived with the combination of turbulence, lying posture, and bathing wiping, and is mainly manifested in the following aspects.

[0037] (1) Compared with co-current and counter-current, turbulence is characterized by change, disorder, eddies and other variable states, and has a better cleaning effect. However, turbulence is usually generated by the collision of water flows with different directions. For example, when co-current is generated by the rotation of the impeller, if the impeller is suddenly switched, the impeller will generate counter-current, while the co-current is still flowing under the action of inertia. At this time, the co-current and counter-current collide to generate turbulence. This turbulence generation method requires the impeller to have a large power. Under the condition of maintaining inertial motion in co-current, it can quickly generate counter-current with a kinetic energy equivalent to that of co-current. Subsequently, the co-current energy will decrease rapidly. If continuous turbulence is to be maintained, the impeller needs to be switched repeatedly. Therefore, this solution employs a pair of impellers to generate turbulence. Each impeller pair consists of at least two impellers. When the two impellers rotate in opposite directions (one clockwise and the other counter-clockwise), two opposing water flows are formed between the two impellers and converge. During this convergence, the water flows continuously collide, generating continuous turbulence. During bathing, the rotational speeds of the two impellers can be adjusted to create a difference in speed, thereby altering the tendency of the turbulence (i.e., changing the area of ​​body part corresponding to the intensity of turbulence) to achieve uniform coverage of the turbulent bathing area.

[0038] (2) The rotation axis of the impeller is perpendicular to the main skin surface, represented by the back and chest. That is, the impeller generates circulation within the range of influence perpendicular to the rotation axis of the impeller. According to the principle of turbulence formation, the collision of two circulations will generate normal radial splitting (i.e., turbulence) perpendicular to the tangent of the circulation. That is, this splitting is perpendicular to the main skin areas such as the back, chest, front of the lower limbs, and back of the lower limbs, forming a direct rolling and rubbing effect, and flowing outward along the skin surface under the influence of the circulation. When combined with a bath sponge, the turbulence drives the bath sponge to surge along the main skin surface in a vertical direction, and then flows outward along the skin along the circulation, forming a rubbing and friction on the skin, which has an excellent cleaning effect.

[0039] (3) In order to minimize the contact area with the surface of the device, the existing pulsator bathing equipment usually adopts a sitting or squatting posture. The vertical space requirement of the bathing equipment adopting a sitting or squatting posture is reduced, while the vertical space requirement is increased, that is, the water depth is increased, that is, the water flow energy generated by the rotation of the pulsator is transmitted upward a longer distance. Since the main skin areas such as the back and chest are concentrated in the upper part, a high-power pulsator is required to ensure the cleaning of the main areas. Due to the limited vertical space, the bottom area is small and a high-power pulsator is required. Therefore, an independent pulsator is usually used at the bottom. If turbulence is to be formed in the upper part, it is necessary to repeatedly switch the direction of the pulsator to generate turbulence, which requires further increasing the power of the pulsator. This will make it difficult for the bather to remain stable. This solution uses a reclining posture, which increases the longitudinal space and reduces the vertical space requirement, meaning the water depth is reduced. The water flow energy generated by the impeller rotation travels a shorter distance upwards or downwards, and the turbulence formed near the impeller can directly act on the skin. Secondly, the reclining posture makes the longitudinal space wider, which helps to disperse multiple low-power impellers, thereby avoiding the formation of strong water flow that could cause discomfort to the bather. Moreover, reclining bathing is more comfortable, especially for disabled elderly people.

[0040] (4) Although there are existing technologies that disclose bathing techniques for reclining postures, such as the structure disclosed in the bathtub with authorization announcement number CN205162901 U, although it is reclining, the bath ball is driven by magnets and requires a lot of magnetic power. The cost of the bath ball is high, and the human skin is a complex curved surface, making it difficult to make the bath ball move along all parts of the skin. Therefore, the uniformity of washing is poor. Secondly, reclining posture causes the back to be in full contact with the recliner, and the large back area leads to blind spots in back washing, which is the biggest problem faced by smart bathtubs that adopt this posture. Therefore, in this solution, the recliner adopts a hollow structure, and the bath sponge can rub against the back. During the bathing process, the recliner carries the bather, the bather's head is above the water surface, and the body is wrapped by the bath sponge. The contact area between the human body surface and the bath sponge can reach 99%, maximizing the reduction of bathing dead corners and achieving the purpose of thorough bathing. Furthermore, since the density of the human body is similar to that of water, when the body is submerged in water, the buoyancy it experiences is similar to that of the body. This means that the support force that the recliner needs to provide to the body is relatively small. Therefore, by greatly increasing the mesh area of ​​the recliner (for example, the solid support part of the recliner is only 1 / 100 of the area of ​​the back of the body), it will not cause discomfort to the person taking a bath.

[0041] (5) The irregular movement of the bath sponge caused by turbulence allows it to rub and massage the skin, achieving the purpose of massage and removing dirt. In the reclining bathing state, the main body area is the front, represented by the chest, which is at the top, and the back, which is in contact with the recliner. Therefore, by controlling the density of the bath sponge, a layered distribution can be achieved so that the bath sponge is dispersed in the main skin area. When the water surges, the upper layer of bath sponge with a higher density will surge up and down and tend to sink, frequently touching the front of the body. Because its volume is larger than the perforated mesh, its activity area is restricted to the upper part of the recliner. The lower layer of bath sponge with a lower density has a lower density and tends to float under the influence of turbulence, frequently touching the back of the body, but is restricted to the lower part of the recliner by the mesh. With the surge of the water, the bath sponge is in a state of frequent contact with the human body. The bath sponge with a lower density mainly cleans the back, buttocks and back of the lower limbs, while the bath sponge with a higher density mainly cleans the chest, abdomen and front of the lower limbs.

[0042] (6) The bathtub lid is set to seal the bathtub body. The sealing ring at the neck opening can be inflated to improve the sealing performance, thereby preventing water from rushing out of the bathtub. Sauna, hot air and other equipment can be added to the bathtub body to realize sauna and drying functions. In addition, by setting a second impeller group on the bathtub lid, the turbulence generated in the upper part of the water can be enhanced, thereby further demonstrating the advantages of low-power impeller multi-point layout, uniform bathing, low threshold, and stable and quiet operation. Although the density of the bath sponge is greater than or less than that of water, the density difference between the two is only slight. Under the state of water surging, the bath sponges are in a state similar to suspension and show an upper and lower layer phenomenon. The second impeller group set on the bathtub lid can enhance the flow of the upper bath sponge and improve the cleaning effect on the chest skin. The first impeller group is mainly used to stimulate the lower bath sponge to clean the back. Compared with existing technologies, it can be seen that the lying position for bathing creates conditions for the installation of the bathtub lid and the second impeller assembly. The second impeller assembly mainly generates turbulence in the surface water. The ability of this turbulence to be transmitted downward is limited. However, precisely because of the lying position, the second impeller assembly can almost bathe the front skin area represented by the chest, thus playing a positive role in bathing. Attached Figure Description

[0043] Figure 1 This is a longitudinal sectional view of the bathtub; Figure 2 This is a schematic diagram of the impeller pair. Figure 3 A top view of the shower unit in the open position; Figure 4 A top view of the shower unit after the recliner has been removed; Figure 5 A cross-sectional view of the bathtub lid of the bathing facility with the lid closed; Figure 6 A partial view of the shower unit with the headrest cover closed; Figure 7 This is a schematic diagram of the sprinkler pipe inside the headrest cover; Figure 8 for Figure 3 A-direction view; Figure 9 A front view of the bathtub lid of the bathing facility with the lid open; Figure 10 A cross-sectional view of the guide strip installed on the inner wall of the bathtub body; Figure 11 A top view of a bath sponge; Figure 12 A cross-sectional view of a bath sponge; Figure 13 A diagram showing a person lying down in a bathtub. Figure 14 This is a structural block diagram of the intelligent control system in Example 6. Detailed Implementation

[0044] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: bathtub body 10, bottom equipment compartment 11, rim 13, bathtub cover 20, top equipment compartment 21, shower head 22, neck opening 23, sealing ring 24, bathtub cover armature shaft 25, headrest cover 30, headrest seat 31, headrest cover drive shaft 32, neck cushion 33, cavity 34, spray pipe 35, opening 351, liquid injection pipe 36, recliner 40, reinforced area 41, first impeller assembly 50, second impeller assembly 51, impeller pair 52, impeller 53, axial vortex water-facing surface 531, opposing water flow water-facing surface 532, bath sponge 60, net towel 61, bath ball 62, sponge layer 63, guide strip 70, controller 80, control screen 81.

[0045] Example 1: As attached Figure 3 -Appendix Figure 5As shown, the bathing device that performs a bathing method based on the principle of turbulence includes a bathtub body 10, a bathtub cover 20, a headrest cover 30, and a recliner 40 installed inside the bathtub body 10. The edge of the recliner 40 is a rigid outer ring, which is fitted into the side wall of the bathtub body 10. The rigid outer ring can be locked and fixed to the inner wall of the bathtub by adhesive latches, and the latches can be opened to remove the recliner 40. The middle part of the rigid outer ring is a grid-like or honeycomb-like support structure. The support structure can be a honeycomb structure made of rigid filamentous material, resin carbon fiber, or carbon fiber composite material (CFRP), thus making the recliner 40 present a hollow structure. The bathtub cover 20 is connected to the side of the bathtub body 10 via a seat. The bathtub cover 20 and the seat are hinged together by the bathtub cover armature 25. The power mechanism and other equipment that are matched with the armature are installed in the seat. The rotation of the armature drives the bathtub cover 20 to open and close (of course, the bathtub cover 20 can also be opened or closed by lifting the electric push rod). Its driving principle is similar to that of a smart toilet seat. Similarly, when installing the bathtub, the seat of the bathtub cover 20 is installed on the wall side of the bathtub body 10 (i.e., the inside of the bathtub body 10), while an infrared sensor or a kick sensor (preferably a kick sensor) is installed on the outside of the bathtub body 10. The kick sensor is connected to the signal input terminal of the controller, and the power mechanism of the armature shaft is connected to the output terminal of the controller. When a kicking action is detected on the outside of the bathtub body 10, the controller receives the signal feedback from the kick sensor and determines the opening and closing state of the bathtub cover 20. Then, the controller sends an opening and closing signal to cause the armature shaft to perform the corresponding action; that is, when the bathtub cover 20 is in the open state, the closing action is performed, and when the bathtub cover 20 is in the closed state, the opening action is performed. The controller can determine the opening and closing state of the bathtub cover 20 by collecting data from a counter or a contact sensor to analyze the opening and closing state. The headrest cover 30 is located at the head end of the bathtub body 10, and is connected to the headrest seat 31 via the headrest cover drive shaft 32. Similarly, the headrest seat 31 is fixed to the edge 13 of the bathtub body 10, and the headrest cover 30 and the headrest seat 31 are also hinged. The headrest cover drive shaft 32 also uses an armature shaft to drive the headrest cover 30 to open and close. When the headrest cover 30 is raised, it can support the head. When the headrest cover 30 is closed, it covers the bathtub cover 20 and can completely close the bathtub body 10. When the headrest cover 30 is closed, the controller controls the bathtub cover 20 to open. The headrest cover 30 must be raised first, and then the bathtub cover 20 must be opened. Conversely, when the bathtub needs to be completely closed, the bathtub cover 20 must be closed first, and then the headrest cover 30 must be closed.

[0046] During bathing, the bathtub lid 20 is opened by kicking from the outside of the bathtub body 10. After filling the bathtub with water, one can enter the bathtub. The bather lies on the recliner 40 with their head extending out of the tub and resting on the headrest cover 30. To ensure a smooth and comfortable head and body posture, the recliner 40 is tilted upwards corresponding to the back position, with the tilt angle controlled between 15° and 30°. To prevent water from overflowing the bathtub during bathing, the bathtub lid 20 can be closed before bathing. Since the head should be outside the bathtub when bathing with the bathtub lid 20 closed, a neck opening 23 is provided on the bathtub lid 20, corresponding to the bather's neck position when the bathtub lid 20 is closed; as shown in the attached... Figure 5 , 7 As shown, to improve the sealing effect of the neck opening 23, an expandable and contractible sealing ring 24 is adhered to its side wall. In this embodiment, the sealing ring 24 is an air bladder. By inflating the air bladder, the air bladder can be made to fit tightly against the neck. However, the sealing ring 24 can only seal the front space of the neck; therefore, in order to make the back of the neck also sealed, a neck pillow groove is provided on the headrest seat 31. The neck pillow groove is an arc-shaped groove to match the curve of the neck. When a person lies down to bathe, the neck rests in the neck pillow groove, while the head rests on the headrest cover 30. A neck pillow pad 33 is adhered in the neck pillow groove. The neck pillow pad 33 is an air cushion (i.e., a rubber bladder filled with gas or fluid). When the neck rests in the neck pillow groove, the gas in the air cushion is squeezed and flows to both sides, which can fit tightly against the back of the neck. The sealing ring 24 and the neck pillow pad 33 squeeze each other to form a ring around the neck that fits tightly against the neck. In addition, since the bathtub cover 20 rotates downwards to close the bathtub with the armature shaft as the rotation center, a gap should be reserved between the two opposite sides of the neck opening 23 and the two ends of the headrest seat 31 to ensure that the headrest seat 31 can be inserted into the neck opening 23, and the sealing ring 24 extends into the gap to seal the gap at the same time.

[0047] As attached Figure 5 , 6 As shown, the headrest seat 31 and the headrest cover 30 have mutually cooperating cylindrical curved surfaces. When the headrest cover 30 is opened and closed, it rotates along the cylindrical curved surface. The headrest seat has a limiting step, or a limiting step is formed at the joint between the headrest seat and the edge of the bathtub body. The headrest cover 30 abuts against the limiting step, limiting the position of the headrest cover and ensuring that the headrest cover 30 can stably support the head when open. To facilitate control of the opening and closing of the bathtub cover 20 during bathing, the opening and closing of the bathtub cover 20 can also be controlled by voice or gesture. In this embodiment, gesture control is preferred. Specifically, an infrared gesture sensor (or an ultrasonic sensor) is provided on the side of the bathtub cover 20 facing the bathtub body 10, near the outer edge of the bathtub cover 20 (i.e., the side opposite the armature shaft). The infrared gesture sensor is electrically connected to the controller. The controller then controls the armature shaft movement by collecting gesture information through the infrared gesture sensor. The information collected by the gesture sensor can be used to control the opening and closing of the bathtub cover 20.

[0048] The bathtub body 10 has a first impeller assembly 50 at the bottom of its inner wall, and a second impeller assembly 51 on the side of the bathtub cover 20 facing the bathtub body 10. The bathtub body 10 is a double-layer structure made of materials such as acrylic or artificial stone. The bottom of the outer layer of the bathtub body 10 has an opening as a maintenance port for the bottom equipment compartment 11. The bathtub cover 20 has a top equipment compartment 21. The bathtub cover 20 consists of a front panel and a bottom cover plate. The bottom cover plate has a recessed structure with a slope roughly parallel to the human lying posture, maintaining a distance of about 20 cm from the human body. The top equipment compartment 21 is located between the front panel and the bottom cover plate, and the bottom cover plate is fixed to the front panel with waterproof bolts. There are 6 motor positioning mounting platforms on the bottom cover plate, and the motor parts of the impellers are embedded and fixed. The top equipment compartment 21 can be opened by removing the bottom cover plate. The top equipment compartment 21 can be used to install controllers, electrical control components, shampoo reservoirs, sensors, solenoid valves, relays, pipelines, and other related equipment and components. The bottom equipment compartment 11 can be used to install intelligent mixing valves, hot air blowers, steam pumps, and other components. The first impeller assembly 50 and the second impeller assembly 51 each consist of three pairs of impellers 52 arranged along the length of the bathtub body 10. Each impeller pair 52 consists of two impellers 53 controlled by variable frequency motors for forward and reverse rotation and stepless speed regulation. The impellers 53 and motors are integrated into one structure, and the motors are waterproofed. The bottom of the motor of the first impeller assembly's impeller 53 is directly bonded to the inner wall of the bottom of the bathtub body 10. Furthermore, safety guards are installed on the outer side of the impeller blades of the impellers 53. The protective function of the guards is to prevent bathers from contacting the rotating impellers, while also ensuring that the guards do not obstruct water flow.

[0049] As attached Figure 2 As shown, the impeller 53 includes an impeller disk and four blades mounted thereon. The cross-section of the blades in the width direction is trapezoidal. The angle between the two sides of the blades and the surface of the impeller in the water-facing direction can be set between 90° and 110°. The two sides of the blades in the width direction serve as the water-facing surfaces 532 of the colliding water flow. The height of the blades gradually decreases from the outer edge of the impeller 53 towards the center of the impeller, that is, the outer end of the blade forms the blade high area, and the inner end of the blade forms the blade low area. That is, the shape of the blades in the length direction is approximately a right trapezoid. After the edges on the left or right sides of the middle section of the slope are cut into a semi-circular shape, an axial vortex water-facing surface 531 is formed. The angle of inclination of the axial vortex water-facing surface 531 relative to the upper surface of the impeller disk in the water-facing direction is 130°-150°. The area of ​​the water-facing surface 532 of the colliding water flow is four times that of the axial vortex water-facing surface. When the two impellers 53 of the impeller pair 52 rotate in the standard direction (i.e., the left impeller rotates clockwise and the right impeller rotates counterclockwise), the axial vortex water-facing surface 531 of the blade and the water-facing surface 532 of the colliding water flow simultaneously face the water.

[0050] The closer to the outer edge of the impeller 53, the greater its linear velocity and the greater the kinetic energy of the water flow it generates. Since the rotating water flow is the main kinetic energy for the turbulence generated by the impact, and the spiraling vortex is the secondary kinetic energy, the impacting water flow surface 532 is closer to the outer edge, while the axial vortex impacting surface 531 is closer to the center. The blade near the center of the impeller 53 forms a low zone, naturally causing the impacting water flow surface 532 to be closer to the outer edge of the impeller 53. Since the blade low zone gradually decreases in elevation, when the axial vortex impacting surface 531 generates a spiraling vortex, the slope of the blade low zone has the effect of hindering the outward dispersion of the vortex. Therefore, the slope of the blade low zone can reduce the tendency of the spiraling vortex to disperse outward.

[0051] The two impellers 53 of the impeller pair 52 are controlled to rotate in the standard direction. The colliding water flow's upstream surface 532 shears and drives the water body to form a colliding water flow diverging along the tangential direction of the impeller 53. The two water flows collide between the two impellers 53, and then transform into various forms of turbulence. Simultaneously, turbulence occurs between the three impeller pairs of the first impeller group and between the three impeller pairs of the second impeller group. Figure 1 The impeller shown generates turbulent fluid activity by colliding with the same water flow. The water flow is converted into normal radial splitting after the collision; the water flow between the impeller and the bathtub wall also mainly converts into turbulence after the impact; the axial vortex on the water-facing surface 531 agitates the water, forming an axial water vortex. Normal radial splitting, turbulence, and vortices are fluid forms formed under set and controllable conditions in the flow field. After reaching the Reynolds threshold, they exhibit turbulence, serving as the primary and secondary kinetic energy utilized by the bathing system. Turbulence effectively covers its corresponding skin area, allowing the skin to fully receive the patting and rubbing of the turbulent bath sponge 60, resulting in good cleaning. When the two impellers 53 of one impeller 52 rotate at low speed in the same direction, or when only one impeller 53 rotates, the water flow in the bathtub is in a downstream state, flowing over the surface of the bather's body. The Reynolds number is low, making it difficult to generate turbulence, thus resulting in a gentler bathing experience.

[0052] As attached Figure 1 Appendix Figure 13 As shown, the bottom cover of the bathtub lid 20 is recessed, with the depth gradually increasing from the bather's chest to their feet, thus ensuring a consistent distance between the impeller 53 and the bather's skin surface. Furthermore, when the bathtub lid 20 is closed, the bottom cover sinks directly into the bathtub body 10, blocking the upper space of the impeller pair 52. Consequently, the turbulence generated by the second impeller assembly 51 cannot flow upwards but can only be transmitted downwards towards the skin surface.

[0053] Of course, the impeller pair 52 can also be composed of four impellers 53. The key is that the direction of the impellers 53 within a single impeller pair 52 can be independently controlled. According to tests, when the impeller operates at the same power in different water depths, its rotational speed decreases with increasing water pressure (i.e., water depth). The kinetic energy and velocity of the water are lower than in shallow water areas, meaning that water pressure is one of the main factors hindering the generation of turbulence. Therefore, in this embodiment, the diameter of the impeller 53 in the first impeller group 50 is set to 12 cm, and the maximum power of the configured variable frequency motor is 150 W; the diameter of the impeller 53 in the second impeller group 51 is set to 10 cm, and the maximum power of the configured variable frequency motor is 100 W. The bathtub body 10 has a water storage capacity of 300 L, and the impeller speed is infinitely adjustable between 60-600 rpm to adjust the Reynolds number of the colliding water flow and the axial water flow to the Re threshold or above.

[0054] As attached Figure 13 As shown, the bathtub body 10 is equipped with a bath scrubber 60 that flows with the water. The area of ​​the bath scrubber 60 is larger than the area of ​​a single perforated hole on the recliner 40. During the water flow, the bath scrubber 60 is difficult to pass through a single perforated hole. Therefore, the recliner 40 divides the bath scrubber 60 into an upper bath scrubber and a lower bath scrubber. The inscribed circle diameter of the perforated hole on the recliner 40 is set to 60mm, while the bath scrubber 60 is set as an 80mm×80mm square. The overall density of a single upper bath scrubber is slightly greater than that of water. In this embodiment, the overall density of the upper bath scrubber is set to 1.1 times the density of water, so that in a static state, the upper bath scrubber sinks and covers the body of the bather. The overall density of a single lower bath scrubber is set to 0.9-1 times the density of water, that is, in a static state, the upper bath scrubber is suspended or tends to float, but is distributed under the recliner 40 due to the obstruction of the recliner, so that the lower and upper bath scrubbers wrap around the bather. When the water is flowing, the upper bath scrubber moves in the upper layer, while the lower bath scrubber moves in the lower layer, rubbing the front and back skin of the bather respectively. When the human body is in a lying bathing position, the main body area is concentrated in the two areas represented by the chest and back. The upper and lower layered state of the bathing rub 60 allows the lower part of the bathing rub 60 to contact the back as much as possible, while the upper part of the bathing rub 60 can contact the chest as much as possible, thereby improving the evenness of the bathing.

[0055] As attached Figure 11 , 13As shown, the bath sponge 60 includes a sponge layer 63 and a rough mesh 61 attached to the surface of the sponge layer 63. The total thickness of the sponge layer 63 is designed to be 1 cm. Bath balls 62 are arranged in a matrix within the sponge layer 63. In this embodiment, the bath balls 62 are arranged in a 2×2 matrix at the four corners of the bath sponge 60; of course, the bath balls 62 can also be arranged in a 3×3 matrix. The sponge layer 63 is composed of two layers of sponge, each 0.5 cm thick. The bath balls 62 are wrapped by the two layers of sponge from both sides and then fixed inside the bath sponge 60 with stitching. The different diameters of the bath balls 62 create irregular protruding curved surfaces on the surface of the sponge layer 63, increasing the probability of contact with the irregular curved surfaces of the body.

[0056] Bath balls 62 are divided into three diameter series: large diameter bath balls 62 with a diameter of 20-30mm, medium diameter bath balls 62 with a diameter of 10-20mm, and small diameter bath balls 62 with a diameter of 5-10mm. The proportions of the three diameter bath balls 62 are 25% for large diameter bath balls, 40% for medium diameter bath balls, and 35% for small diameter bath balls. Different diameters provide different tactile sensations on the body, and by arranging the different diameter series, different massage sensations can be obtained during bathing. The bath ball 62 is a hollow sphere made of rigid polyvinyl chloride (UPVC). Rigid polyvinyl chloride (UPVC) has a density greater than water. By injecting water into the inner cavity of the bath ball 62, its density can be adjusted, thereby adjusting the overall density of the bath scrubber 60. This allows the density of the bath ball 62 to be greater than, equal to, or less than that of water. The densities of the four bath balls in the same bath scrubber 60 are randomly distributed, as long as the overall density of the bath scrubber meets the requirements for the upper or lower layer. This results in a non-uniform density distribution within the bath scrubber 60. Consequently, in a static state, each bath scrubber 60 exhibits a different posture in the water, and its flow will involve sweeping across the skin at different angles. Furthermore, the non-uniform density distribution of the bath scrubber 60 results in different inertia at different points. When the bath scrubber 60 impacts the skin, it will twist and curl on the skin, increasing friction.

[0057] As attached Figure 5 , 10 As shown, the inner wall of the bathtub body 10 along its length is provided with several guide strips 70 protruding from the wall surface. The guide strips 70 are arranged along the human body axis and symmetrically distributed about the human body axis. The guide strips 70 are curved with one end bent towards the human body axis, and the cross-sectional height of the guide strips is set to 3-5 cm. During bathing, the guide strips 70 guide the water flow, directing the water flow from the upper and lower layers towards the central axis of the human body. During bathing, the bath sponge 60 is both turbulent and flowing with the water flow, thus, under the influence of the guide strips 70, it guides the bath sponge 60 towards the bather, increasing the probability of contact between the bath sponge 60 and the bather's body.

[0058] The application of this bathing device to perform a bathing method based on the principle of turbulence includes the following steps: Step 1: Fill the bathtub body 10 with water to the designated water level. When filling the bathtub, add an appropriate amount of shower gel or not, depending on the bather's preference. The designated water level can be half of the total water volume of the bathtub body 10. This avoids water overflowing after the bather lies in the bathtub when the water level is at its maximum. Also, filling the bathtub with water and then letting the bather lie in it to reach the preset water level can prevent the bather from getting cold.

[0059] Step 2: The bather enters the bathtub body 10 and lies down on the recliner 40 to soak. Because the recliner is openwork, the area supporting the body only occupies 1% of the body's surface area, allowing the bather to be in a state of near-float in the water. The recliner acts as an auxiliary support structure; since the density of the human body is similar to that of water, a slight upward lift is sufficient to maintain a floating state when the body is submerged. Besides the recliner, other auxiliary support can be provided by armrests or similar supports. Water can then be added to the bathtub until the maximum water level is reached, enough to submerge the second impeller assembly 51. This process takes time; the bather can wash their hair manually while soaking.

[0060] Step 3: Close the bathtub lid 20, inflate the sealing ring 24 to close the neck opening 23, and rotate all impellers 53 at low speed in the same direction for 1-2 minutes or rotate only one impeller 53 in a pair of impellers 52 for 1-2 minutes to create a flow in the bathtub body 10 to spread the bath sponge 60 and prepare for a deep bath.

[0061] Step 4: Control all 12 impellers 53 of the 6 pairs of impellers 52 to rotate in the standard direction for 3-5 minutes; pause for 1 minute; repeat 2-5 times to create an intermittent, continuous turbulent flow of the bath sponge 60, rubbing and massaging the skin for a comfortable bathing experience. Simultaneously, you can adjust the impeller speed to low, medium, or high to meet different bathing intensities, from mild to strong. You can also adjust the speed difference between the impellers to ensure the bath sponge moves back and forth around the body surface for optimal contact.

[0062] Step 5: Switch all impellers 51 to rotate at medium speed and then low speed in the same direction for 1-3 minutes to create a current within the bathtub body 10. The water flow is gentle and soothing to the body. This allows the body to relax and complete the bath. Simultaneously, the drain valve is opened during the current flow program, draining water while the current flows. The centrifugal force of the current moves the bath sponge away from the body and splashes it around the edge of the bathtub to drain naturally.

[0063] Step 6: After emptying the bathtub of wastewater, close the drain valve. Open the water inlet valve, and clean water is sprayed into the bathtub through the showerhead, spraying the front of the bather's body for cleaning; at the same time as the water is sprayed into the tub, the impeller 53 of the first impeller assembly 50 rotates slowly in the forward direction, and the impeller blades splash water droplets to continuously wash the back of the body; the cleaning program is timed for 3-5 minutes and executed in two stages. In the first stage, water is introduced and the impeller rotates; in the second stage, the water level reaches 2cm below the lowest point of the recliner, the drain valve opens, and a small amount of water is drained, the drain volume equal to the water inlet volume, while the impeller continues to rotate until the skin is clean. When the timer ends, the water inlet stops, the impeller stops rotating, and the drain valve is fully opened until the drainage is complete.

[0064] According to user needs, sauna, hot air, and disinfection components can be added to the bottom equipment compartment 11 and the top equipment compartment 21. Hot air and steam pipeline interfaces can be added to the bathtub body 10, headrest cover 30 and bathtub cover. After bathing, sauna, drying and disinfection procedures can be performed.

[0065] Example 2: The difference between Example 2 and Example 1 is as follows: (See attached) Figure 6-9 As shown, the headrest cover 30 is equipped with several spray pipes 35 for rinsing the head. The spray pipes 35 are connected to a controllable water source and a controllable hot air blower via solenoid valves. By switching the solenoid valves, the spray pipes 35 can spray water or blow hot air. The headrest cover has a cavity 34 inside. The ends of the spray pipes 35 extend to and are fixed to the outer wall of the headrest cover 30. The heads of the spray pipes 35 penetrate the inner wall of the headrest cover 30 and are provided with spray nozzles. The part of the spray pipe 35 located in the cavity 34 has an opening 351, so that the spray pipe 35 is connected to the controllable water source and the controllable hot air blower through the cavity 34. The water or hot air first enters the cavity 34 and then is diverted and guided to the head of the spray pipe 35. The head of the spray pipe 35 protrudes from the surface of the headrest cover 30 and is elastic. When washing hair, the movement of the head has a scratching effect on the hair, which also achieves the effect of massaging the head. The bathtub cover 20 has a shampoo reservoir inside its compartment, and the side of the headrest cover opposite the head has an injection pipe 36. The injection pipe 36 is connected to a pump inside the shampoo reservoir to extract shampoo. The solenoid valve and pump can be controlled via voice activation to perform shampooing, washing, and drying functions. Specifically, after completing step 1 of the bathing method in Embodiment 1, the solenoid valve is controlled to connect to a controllable water source, causing the spray pipe 35 to spray water. Simultaneously, the injection pipe 36 squeezes out shampoo, thus cleaning the head. Water from the washing process flows into the bathtub. After washing the head, the bathtub cover 20 can be closed, proceeding to step 2 of Embodiment 1. The solenoid valve is controlled to connect to a controllable hot air blower, allowing hot air to be blown out through the spray pipe 35 on the headrest cover 30 to dry the hair.

[0066] Example 3: The difference between Embodiment 3 and Embodiment 1 is that in Embodiment 3, the bathtub cover 20 is equipped with a shower head 22, which is connected to a water suction pipe and a water pump. The water suction pipe extends into the bathtub body 10. During bathing, the water suction pipe draws water from the bathtub body 10 and sprays it out through the shower head 22, achieving a rinsing effect. Secondly, the bottom of the bathtub body 10 is equipped with several air jets, which are connected to an air pump and an air jet suction pipe. The air jet suction pipe extends to the bathtub cover 20. That is, during bathing, the air jet suction pipe draws air from the upper space of the bathtub and blows it out from the bottom. On the one hand, the air bubbles can intensify water vibration and further promote turbulence. Additionally, the surface of the recliner 40 is covered with high-density polyester fiber. The surface of the high-density polyester fiber has a frosted or granular texture (similar to the surface structure of a bath towel). Under the stimulation of the water flow, the body will vibrate to a certain extent with the water flow, thus creating a relative displacement between the body and the recliner 40. The frosted or granular texture on the surface of the recliner 40 can clean the skin in contact with the recliner 40. The shower head 22 can also serve as a steam or hot air outlet.

[0067] Example 4: The difference between Embodiment 3 and Embodiment 1 is that in Embodiment 4, the bathtub body 10 has armrests on its front and rear side walls, and the armrests have touch panels electrically connected to the controller. The impeller 52 is also electrically connected to the controller. The touch panel can be locked and unlocked using multi-finger gestures. After unlocking, the speed of the impeller 53 can be adjusted by sliding a finger on the touch panel, thus allowing for comfort adjustment according to individual needs. During bathing, holding the armrests and covering the touch panel prevents accidental operation caused by touching the touch panel while bathing. The multi-finger gesture locking and unlocking also prevents accidental operation caused by unconscious hand movements. Alternatively, a voice access system can be installed for comfort adjustment via voice control.

[0068] Example 5: The difference between Example 5 and Example 1 is as follows: Figure 3 As shown in Embodiment 5, a reinforcing zone 41 is provided in the middle of the recliner 40 corresponding to the leg area. The reinforcing zone 41 is woven with fibers of larger diameter and higher strength, and a rigid outer ring is also provided on the outer periphery of the reinforcing zone 41. This rigid outer ring is connected to four support rods and supported at the bottom of the bathtub body 10. When a person enters the bathtub, they usually step on the horizontal section of the recliner 40 first, and the entire weight will be concentrated on the horizontal section (i.e., the position corresponding to the reinforcing zone 41). The weight is distributed through the reinforcing structure of the reinforcing zone 41, thereby improving the strength of the recliner 40.

[0069] Example 6: The difference between Example 6 and Example 1 is that in this example, the bathing device is entirely controlled by an intelligent control system, as shown in the attached diagram. Figure 14As shown, the intelligent control system includes a data acquisition module, an execution module, a data storage module, a controller, and an interactive control screen 81. The controller 80 is located inside the bathtub cover housing, and the control screen 81 is embedded in the outside of the bathtub cover. The data acquisition module includes a kick sensor located on the front of the bathtub body, an ultrasonic sensor located on the front of the bathtub cover, a pressure sensor located on the headrest cover, and a microphone for voice information acquisition. The data acquisition module collects data from each sensor and transmits it back to the controller for data analysis to perceive the bathtub's status. Then, the controller 80 generates execution signals and distributes them to the corresponding execution components of the execution module to complete the corresponding actions. The execution module includes the bathtub cover armature shaft, the headrest cover armature shaft, the impeller, and other execution components (such as the shower head and sealing ring).

[0070] Specifically, the kick sensor is used to detect kicking motions at the front of the bathtub, the ultrasonic sensor is used to detect hand gestures in front of the bathtub lid 20 to detect the closed state of the bathtub lid 20, and the pressure sensor can detect the pressure data acting on the headrest cover 30; the controller 80 has an execution program. When the kick sensor reports a kicking motion, the controller 80 determines the closed state of the bathtub lid 20 based on the distance signal fed back by the ultrasonic sensor. If the bathtub lid 20 is closed, the bathtub lid 20 and the headrest cover 30 are opened in sequence; if the bathtub lid 20 is open and the pressure sensor reports that the headrest cover 30 is under pressure, only the bathtub lid 20 is closed; when the bather is lying in the bathtub body 10, the ultrasonic sensor can also detect the bather's hand gestures to open or close the bathtub lid 20.

[0071] The opening and closing of the bathtub lid 20 and the execution of bathing programs can also be controlled by voice. The bathing program has a pre-set standard bathing procedure. For example, when executing a bathing program, the sealing ring 24 is first expanded, then all impellers 53 of impeller 52 rotate in the same direction for a pre-wash, and then all impellers 53 of impeller 52 rotate in the standard direction to perform a turbulent bath. Parameters such as the direction, speed, and duration of the impellers 53 can also be customized on the control screen 81. During the execution of the customized mode, the above bathing parameters can be adjusted according to the bather's preferences, and the adjustment commands are input via voice. Data from each bath is stored in the corresponding customized bathing mode in the data storage module. Through AI intelligent learning, the corresponding customized mode parameters are optimized, which can improve bathing comfort and experience according to the bather's preferences. Through repeated iterations, targeted bathing habits are formed for the bather.

[0072] Example 7: The difference between Example 7 and Example 1 is that the bathing device in this example can be used in elderly care facilities. These facilities provide care services, so when using this device to bathe elderly people under their care, the device is controlled by the caregivers. Specifically, in Example 7, the opening and closing of the bathtub lid and headrest lid can be controlled manually by issuing individual control commands or directly by the caregivers. The expansion and contraction of the sealing ring, the speed and direction of the impeller, etc., can also be adjusted by the caregivers issuing individual control commands.

[0073] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the method and structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A bathing method based on the principle of turbulence, characterized in that: The bathing is performed in a lying position in the bathtub. The person being bathed is suspended in the water by an auxiliary support structure. There are bath scrubbers distributed in layers in the water, including an upper bath scrubber and a lower bath scrubber that wrap around the person being bathed. During the bathing process, a pulsator drives the water flow. The rotation of the pulsator pushes the water to form a rotating water flow zone that rotates along the center of the pulsator and spreads outward. By assembling the pulsators into pairs, at least two rotating water flow zones continuously spread outward and collide with each other, causing the Reynolds number to reach the Re threshold or above, and continuously generating turbulence. The turbulent flow of the bathing scrubber repeatedly rubs and rubs the human body surface to remove dirt. The paired pulsators are configured in groups of at least two, with the front and back of the bather facing each other respectively. The paired pulsators in each group are arranged sequentially along the height direction.

2. The bathing method based on the principle of turbulence according to claim 1, characterized in that: During the bathing process, the speed and speed difference of the paired impellers are periodically adjusted.

3. The bathing method based on the principle of turbulence according to claim 1, characterized in that: The impeller includes an impeller disk and multiple blades evenly distributed on the upper surface of the impeller disk. One or both sides of the blades are provided with a counter-current water-facing surface with an inclination angle of 90°-110° relative to the upper surface of the impeller disk. One or both sides of the blades are provided with an axial vortex water-facing surface with an inclination angle of 130°-150° relative to the upper surface of the impeller disk. The blades include at least one set of axial vortex water-facing surfaces and counter-current water-facing surfaces located on the same side. The area of ​​the counter-current water-facing surface is 2-4 times the area of ​​the axial vortex water-facing surface.

4. A bathing method based on the principle of turbulence according to claim 1, characterized in that: The bath sponge includes a sponge layer, a rough mesh covering the surface of the sponge layer, and a bath ball filled inside the sponge layer.

5. A bathing method based on the principle of turbulence according to claim 1, characterized in that: The bath sponge is filled with several bath balls. The bath balls in the same bath sponge are divided into multiple density series. The overall density of the bath sponge is divided into two density series according to the upper bath sponge and the lower bath sponge.

6. A bathing method based on the principle of turbulence according to claim 1, characterized in that: The ratio of the skin area of ​​the person being bathed to the total area of ​​the bathing area is 1 / 1.5-1 / 2.

7. A bathing method based on the principle of turbulence according to claim 3, characterized in that: The vertical distance between the impeller surface and the bather's body surface is 8-20 cm.

8. A bathing device based on the principle of turbulence, characterized in that: The bathtub includes a bathtub body, a first impeller assembly located at the bottom of the inner wall of the bathtub body, a recliner located above the first impeller assembly, and a bath sponge that flows with the water. The first impeller assembly consists of multiple impeller pairs, each impeller pair including at least two impellers whose speed and direction can be independently controlled. The bath sponge includes a sponge layer and bath balls of various diameters encased in the sponge layer. The recliner has a hollow honeycomb or grid structure. The area of ​​the bath sponge is larger than a single hollow hole on the recliner. The bath sponge is divided into an upper bath sponge and a lower bath sponge by the recliner.

9. The bathing device based on the principle of turbulence according to claim 8, characterized in that: It also includes a bathtub lid, which is used to cover and seal the bathtub body. The bathtub lid has a neck opening for the neck to protrude, and the neck opening is equipped with an expandable and contractible sealing ring.

10. The bathing device based on the principle of turbulence according to claim 9, characterized in that: The inner wall of the bathtub cover is provided with a second impeller assembly that is opposite to the first impeller assembly at the bottom of the bathtub body. When the bathtub cover is closed, the inner wall of the bathtub cover in the area where the second impeller assembly is located sinks into the bathtub body to below the highest water level.

11. The bathing device based on the principle of turbulence according to claim 9, characterized in that: It also includes a headrest cover, which is hinged to one end of the bathtub body; when the headrest cover is open, it is used as a pillow, and when the headrest cover is closed, it cooperates with the bathtub cover to seal the neck opening.

12. The bathing device based on the principle of turbulence according to claim 8, characterized in that: The bath ball is a hollow sphere made of rigid polyvinyl chloride. The density is adjusted by injecting water into the bath ball. The overall density of the upper bath sponge is greater than the density of water, and the overall density of the lower bath sponge is equal to or less than the density of water.

13. The bathing device based on the principle of turbulence according to claim 8, characterized in that: The section of the recliner opposite the backrest is an inclined section with an inclination angle of 15°-30°. The axes of the first and second pulsator groups opposite the inclined section are perpendicular to the inclined section.

14. The bathing device based on the principle of turbulence according to claim 8, characterized in that: The inner wall of the bathtub is equipped with guide strips, which are symmetrically distributed along the human body axis to form an upper guide strip and a lower guide strip. The upper guide strip guides the air downwards, and the lower guide strip guides the air upwards. The upper and lower guide strips are located on both sides of the recliner.

15. The bathing device based on the principle of turbulence according to claim 11, characterized in that: It also includes a controller, a microphone, a control screen, and a data storage module; the impeller, microphone, control screen, and data storage module are all connected to the controller via signals. The microphone is used to collect voice signals, the control screen serves as an interactive panel, through which bathing parameters are adjusted and custom modes are set, and the data storage module is used to store bathing data. During the execution of the custom mode, the bathing parameters can be adjusted according to the bather's preferences, and the stored bathing data can be used as input for AI intelligent learning to optimize the custom mode.

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