Soft bathtub with control center housing

Abstract

A soft bathtub, characterized by: a control center housing (1), a bathtub body (2), a return pipe connection (3) and an outlet pipe connection (4), wherein the control center housing (1) comprises a first pipe (15) and a second pipe (16), the bathtub body (2) comprises: a tub container (20) with an installation chamber (201), wherein the inner wall (202) of the container has a return hole (203); a return pipe (21) and a transport tube (22) arranged in the installation chamber (201), wherein the return hole (203) is connected to the return pipe connection (3) via the return pipe (21), and the transport tube (22) is connected to the outlet pipe connection (4); several nozzles (23) arranged on the inner wall (202) of the container and connected to the transport tube (22); and a filter (24) which is arranged in the installation chamber (201) and is installed in the return pipe (21); The return pipe connection (3) is connected to the first pipe (15) and the return pipe (21), the outlet pipe connection (4) is connected to the second pipe (16) and the transport tube (22), and the control center housing (1) receives water from the bathtub body (2) via the return pipe (21) and directs it back to the bathtub body (2) via the transport tube (22), thus forming a closed water circulation path.

Description

Field of invention

[0001] The present invention relates to the field of sanitary engineering and in particular to a soft bathtub with a control center housing. State of the art

[0002] In terms of sanitary facilities, the bathtub is one of the most important fixtures for home bathing. 1. Conventional bathtubs are typically manufactured using an acrylic molding process, which is then reinforced with fiberglass and resin. This leads to environmental pollution, the products are not recyclable, and the manufacturing process can be hazardous to the health of the operators. 2. Conventional bathtubs consume a large amount of electrical energy during bathing to provide the necessary heat. The new soft bathtub uses pearl foam, which is naturally heat-insulating and has minimal heat loss. 3. Installing conventional acrylic bathtubs requires a crane, which limits the installation position. The new soft bathtub is very lightweight – only about one-tenth the weight of conventional bathtubs – and can be installed anywhere. 4. Conventional acrylic outdoor bathtubs generate high noise levels during use. The new bathtub uses a low-noise water pump enclosed in a heat-insulated beaded foam housing, further reducing noise and achieving quiet operation. Object of the invention

[0003] In view of the shortcomings of the prior art, the objective of the present invention is to provide an environmentally friendly, energy-efficient, lightweight, comfortable and easy-to-clean new soft tub.

[0004] To achieve this goal, the invention provides a control center housing for soft tubs, comprising the following: a housing with a receiving housing; an insulating layer attached to the inner wall of the housing; as well as The system comprises a control system located within the housing and encased in insulation, a UV sterilizer, a water pump, a first line, and a second line. The control system integrates a controller and a heating element with a heating chamber. The controller is electrically connected to the heating element, the water pump, and the UV sterilizer. The UV sterilizer is equipped with a sterilization chamber. Both the heating chamber and the sterilization chamber are connected between the first and second lines. The water pump circulates the water through the first line, the sterilization chamber, the heating chamber, and the second line, thus creating a water circuit.

[0005] Specifically, the insulation layer can consist of beaded foam. This layer is attached to the inner wall of the housing and effectively prevents heat from escaping from the heating chamber, pipes, and hot water. This significantly reduces the energy consumption of the heater required to maintain the set water temperature, thus lowering energy costs. The water pump ensures continuous circulation of the water within the circuit that includes the heating chamber. This allows the water temperature throughout the entire tub to quickly reach the set value and be evenly distributed, preventing local overheating or undercooling and maintaining a stable temperature at the user's desired comfort level for extended periods, providing a continuous and consistent bathing experience.The UV sterilizer is embedded within the insulating layer and housing, preventing any radiation leakage and ensuring safe operation. The sterilization chamber is integrated into the water circuit, so the water is directly exposed to UV radiation as it flows through, effectively killing bacteria, viruses, and other microorganisms. Compared to chemical disinfectants, UV sterilization produces no harmful byproducts or chemical residues, thus avoiding skin irritation, odors, and other problems, and increasing environmental friendliness. All core components—controller, heating element, UV sterilizer, water pump, and tubing—are integrated within the housing and secured by the insulating layer. This highly integrated design saves considerable space and results in a compact structure.The controller is connected to the radiator, water pump and UV sterilizer via electrical cables, enabling integrated control.

[0006] The invention is further designed as follows: The heating compartment and the sterilization compartment are arranged in parallel, creating a parallel, unidirectional water circulation. Following this parallel connection, the total flow is divided into two independent branches, ensuring rapid and uniform mixing of the heated and sterilized water. This reduces temperature stratification as well as local overheating or undercooling, and improves the uniform distribution of the water temperature and overall comfort. Furthermore, the total pressure drop in the parallel arrangement is significantly lower than the combined pressure drop in a series connection. The water pump only needs to overcome the pressure drop of the parallel branch with the greater resistance, thereby considerably reducing the required delivery pressure and power consumption.The operation becomes more energy-efficient, and the low-resistance operation reduces the mechanical and thermal stress on the water pump, reduces wear and tear, and extends the service life of the water pump.

[0007] The invention is further designed such that a spirally wound tube coil is attached to the outer wall of the water pump housing. The inlet of the tube coil is in direct connection with the first tube, and the outlet with the second tube. The heat generated during operation of the water pump heats the housing, and the spiral tube coil lies close to the housing surface. The waste heat is efficiently absorbed through thermal conduction, while the cold water circulating in the tube coil continuously dissipates the heat from the housing, thus cooling the water pump. The tube coil consists of a single piece of stainless steel, titanium, or copper tubing. These three materials exhibit high corrosion resistance and good thermal conductivity, ensuring that the heat transfer performance of the entire tube coil remains uniform and stable.The one-piece construction means that the coil is bent from a single continuous tube without welds or joints, thus avoiding leakage problems due to welding defects. Furthermore, the inner wall of the one-piece coil is smooth, resulting in low flow resistance.

[0008] The invention further provides that the water pump is driven by a two-speed motor, the two-speed motor being operated by switching between low-speed and high-speed modes. In low-speed mode, the flow rate is 40-60% of the nominal value, and in high-speed mode, it is 85-105% of the nominal value. The two-speed motor achieves the change in speed by switching the number of poles of the internal windings. The speed in high-speed mode is approximately twice the speed in low-speed mode. The energy consumption in low-speed mode is significantly lower than in high-speed mode, which effectively reduces energy consumption.Depending on system requirements, the modes can be switched automatically: at low flow rates, the low-speed mode is used, which is quiet and energy-saving; at high flow rates, the high-speed mode is used, which enables a fast response.

[0009] The invention is further designed such that the control center housing comprises a ventilation system arranged within the receiving housing and enclosed by the insulating layer. The ventilation system includes a gas valve, a control switch, and a third line connected to the gas valve. The control switch is electrically connected to the gas valve to control its operating state and is located on the outside of the housing. The gas valve, control switch, and third line are fully integrated and share the receiving housing of the existing water system, thus enabling a compact structure and simple, integrated control.

[0010] The invention is further configured such that the control center housing additionally includes a silencer and a loudspeaker. The first, second, and third lines each run through the silencer, and the loudspeaker is connected to the controller via a signal or electrical connection. Specifically, the silencer consists of porous foam material (e.g., aluminum foam, polyurethane foam). When sound waves enter the microchannels of the foam material, sound energy is dissipated through friction against the channel walls, air viscosity, and thermal conductivity. The lines run through the silencer, which, together with the housing, forms a sealed unit, effectively shielding and absorbing noise from the water pump and gas valve. The loudspeaker is waterproof and simultaneously ensures clear sound quality.

[0011] The invention is further designed such that the controller is electrically connected to a control panel mounted on the outside of the housing. The controller and control panel are connected via electrical cables. The control panel enables effective human-machine interaction, such as the real-time display of the inlet and outlet water temperature difference, monitoring of heat loss, display of the pressure curve of the ventilation system for intelligent assessment of gas release, and display of the remaining service life of the UV lamp with timely replacement warnings. Furthermore, the control panel can be connected to a mobile phone via a signal connection, allowing operation via an app.

[0012] The invention further relates to a soft tub consisting of the tub body, a return connection, an outlet connection, and the control center housing described above. The tub body comprises: a bathtub body with a built-in housing, wherein the inner wall of the bathtub body is provided with a return connection; Return lines and transport lines arranged within the installation housing, wherein the return connection is connected to the return connection via the return line, and the transport line communicates with the outlet connection; several nozzles arranged on the inner wall of the tub body and all are connected to the transport line; as well as a filter built into the mounting housing, which is located on the return line.

[0013] The return connection links the first line to the return line, and the outlet connection links the second line to the supply line. The control unit housing receives water from the main tub body via the return line and returns it to the main tub body via the supply line, thus creating a closed water circuit.

[0014] The soft tub comprises the tub body, in which the supply line is integrated. The nozzles are located on the inner wall of the tub body and connected to the supply line. The return connection, which is connected to the filter, is also located on the inner wall of the tub body. The heating element, UV sterilizer, water pump, return connection, and outlet connection are located on the outside of the tub body. One side of the return connection is connected to the filter via the return line, and the other side is connected to the control center housing via the first line. One side of the outlet connection is connected to the supply line, and the other side is connected to the control center housing, thus creating a water circuit. The controller is electrically connected to the heating element, UV sterilizer, and water pump to enable integrated control.The tub is equipped with built-in pipes and a filter located at the return connection, which traps hair and other impurities before they enter the circulation, thus ensuring a high-volume, low-resistance water circulation.

[0015] The invention is further arranged in such a way that the soft tub comprises a ventilation connection and a ventilation line arranged within the installation housing, wherein the ventilation line is connected to at least one of the nozzles.

[0016] The control center housing further includes a ventilation system located within the receiving housing and enclosed by the insulating layer. The ventilation system comprises a gas valve, a control switch, and a third line connected to the gas valve. The control switch is electrically connected to the gas valve to control its operating state.

[0017] The ventilation pipe connection connects the ventilation line to the third pipe.

[0018] The inner wall of the pool body can also be equipped with several micro-perforated nozzles for air injection (also known as small nozzles, with a diameter of approximately 1 / 4 that of the large nozzle). These micro-perforation nozzles are connected to the aeration line, but not to the supply line. High-pressure gas flows through the micro-perforations into the water, forming a vortex bubble field. As the bubbles rise, they burst, generating intermittent fluid pulses that provide a massage function.

[0019] The invention is further designed as follows: The ventilation pipe connection comprises a first connecting pipe, a second connecting pipe, a first valve, and a first flange. The first and second connecting pipes are connected via the first valve. The first and second connecting pipes are each detachably connected to the third pipe or the ventilation line via the first flange. The first valve can be a ball valve that controls the flow of the fluid (gas).

[0020] The invention is further designed as follows: The return pipe connection and the supply pipe connection each comprise a connection housing, a second valve, and a second flange. The connection housing is arranged on the water pump, and the second valve is detachably connected to the connection housing via the second flange. The second valve can be a ball valve that controls the flow of the fluid (water). Furthermore, the vent pipe connection is subjected to a lower operating pressure than the supply and return pipe connections. Therefore, the second valves of the supply and return connections can be designed as liquid-side ball valves, while the first valve of the vent pipe connection is designed as a gas-side one-way ball valve. The connection housing has a T-shaped three-way structure, which is simple in design and allows for convenient assembly and connection.

[0021] The invention is further designed as follows: The pool body consists of fused composite pearl foam and is provided with a covering. The inner layer of the covering rests on the outer wall of the pool body. The inner layer consists of pearlescent PVC film, the outer layer of synthetic leather. A fabric is hot-melted onto the outer wall of the pool body, lying between the covering and the pool body. The fabric consists of IXPE foam.

[0022] The invention is further designed such that the filter comprises a screen and a hollow filter housing with a filter inlet and filter outlet. The filter housing has an L-shaped structure. The screen is arranged at the filter inlet, and the filter outlet is connected to the return line. The L-shaped filter structure is compact.

[0023] The invention is further designed as follows: The filter additionally comprises a mounting ring attached to the filter inlet. The screen is detachably connected to the mounting ring. The screen is equipped with a slider which, when rotated, can unlock or lock the screen relative to the mounting ring, thereby allowing the screen to be removed or installed. Specifically, the mounting ring is precisely connected to the filter inlet. The inner wall of the mounting ring can be provided with a mounting lug, while the screen has a guide rail. By sliding the mounting lug in the guide rail, the screen is opened or fixed to the mounting ring. Alternatively, the mounting lug can be arranged on the screen and the guide rail on the mounting ring, which also achieves a detachable connection between the screen and the mounting ring.

[0024] The invention is further arranged in such a way that the filter is filled inside with filter wool for filtration.

[0025] The advantageous effects of the present invention result from the application of the above-mentioned technical measures as follows: 1. Conventional acrylic bathtubs are reinforced with resin, which is environmentally harmful and can be detrimental to the health of the user. In contrast, this soft bathtub is recyclable and environmentally friendly, thus contributing to environmental protection. 2. The integration of water pump, UV sterilizer and radiator into one unit, combined with the heat-insulating properties of pearl foam, enables significant energy savings. 3. Thanks to the design of the tub, it can be set up at any outdoor location, making it particularly flexible and easy to handle. 4. The use of soft and stable beaded foam as a material increases user comfort. 5. The installation of the UV sterilizer enables an intensive water purification program, allowing the water to be reused for a longer period of time and fulfilling the cleaning function. Brief description of the drawings Fig. Figure 1 is a schematic representation of the structure of the control center housing according to an embodiment of the invention; Fig. Figure 2 is an exploded view of the control center housing according to one embodiment of the invention; Fig. Figure 3 is a schematic representation of the structure of the water pump according to one embodiment of the invention; Fig. Figure 4 is a schematic representation of the structure of a soft bathtub according to an embodiment of the invention; Fig. Figure 5 is a schematic representation of the connection between the filter and the bathtub body according to one embodiment of the invention; Fig. Figure 6 is a schematic representation of the structure of the filter according to one embodiment of the invention; Fig. Figure 7 is an exploded view of the filter according to one embodiment of the invention. Description of preferred embodiments

[0026] The following section provides a clearly structured and complete description of the technical solutions disclosed in the invention, with reference to the accompanying drawings. It is understood that the illustrated embodiments represent only a portion of the solutions according to the invention; all variants that can be derived from these examples by a person skilled in the art without inventive step also fall within the scope of protection of the present invention.

[0027] In the following description, the terms "top", "bottom", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" refer exclusively to the positional relationships illustrated in the drawings; they serve solely for simplified representation and do not constitute a restrictive interpretation of the scope of protection.

[0028] As in Fig. 1 and Fig. As shown in Figure 2, the invention provides a control unit 1 for softening tubs. This comprises: a housing 10 with a receiving chamber 101, a thermal insulation layer 11 (preferably beaded foam) applied to the inside of the housing 10, and components housed in the receiving chamber 101 and encased by the insulation layer 11: control unit 12 with integrated controller 121 and a heating element 122 with heating chamber 122a, UV disinfection unit 13 with disinfection chamber 131, two-stage water pump 14, first pipe 15 and second pipe 16.

[0029] Control center housing 1 contains a heater 122, a UV sterilizer 13, a water pump 14, and a control panel 123. The water pump 14 and the heater 122 are combined in a single unit, utilizing the heat-insulating properties of pearl foam to achieve energy savings. The controller 121 is also located in control center housing 1 and is electrically connected to the heater 122, the UV sterilizer 13, the water pump 14, and the control panel 123. The controller 121 controls the switching on and off of the water pump 14, the heating temperature of the heater 122, and the sterilization process by the UV sterilizer 13. The installation of the UV sterilizer 13 enables an intensive water purification program, thus ensuring the long-term use of water resources and providing a cleaning function.The heating compartment 122a and the sterilization compartment 131 are arranged in parallel, creating a parallel, unidirectional water circulation path.

[0030] When the controller 121 is powered on, the water pump 14 starts operating. Initially, the water pump 14 runs at low speed, which saves energy. Immediate operation at high speed would exceed its power limit. At high speed, the water pump 14 has a massage or wave pressure function. The heater 122 is used to maintain the water temperature and can only be activated when the water pump is running at low speed.

[0031] As in Fig. 2 and Fig. As shown in Figure 3, a spirally wound pipe coil 142 is attached to the outer wall 141 of the water pump housing. The inlet 142a of the pipe coil is in through-connection with the first pipe 15, and the outlet 142b is connected to the second pipe 16. The water pump 14 is driven by a two-speed motor 143, which is operated by switching between low and high speed.

[0032] As in Fig. 1 and Fig. As shown in Figure 2, the control center housing 1 also includes a ventilation system 17 arranged in the receiving opening 101 and enclosed by an insulating layer 11. The ventilation system 17 comprises an air valve 171, a control switch 172, and a third pipe 173 connected to the air valve 171. The control switch 172 is electrically connected to the air valve 171 to control the operating state of the air valve 171. The control switch 172 is arranged on the outside of the housing 10.

[0033] As in Fig. As shown in Figure 1, the control center housing 1 also includes a silencer 18 and a loudspeaker 19, which are arranged on the housing 10. The first pipe 15, the second pipe 16, and the third pipe 173 all pass through the silencer 18. The loudspeaker 19 is connected to the controller 121 either by signal or electrically.

[0034] As in Fig. As shown in Figure 1, the controller 121 is electrically connected to a control panel 123, which is mounted on the outside of the housing 10. An electrical connection exists between the controller 121 and the control panel 123 via a cable 124. For example, several buttons are arranged on the control panel 123, each of which can be used separately to switch the control switch 172 on or off, to start or stop the water pump 14, to switch the heater 122 on or off, etc., to facilitate operation for the user.

[0035] As in Fig. As shown in Figure 4, the invention also provides a soft bathtub comprising the bathtub body 2 and the control center housing 1 described above. The bathtub body 2 comprises: the basin body 20, the return line 21 and supply line 22 arranged in the installation space 201, several nozzles 23, and a filter 24 arranged in the installation space 201. The basin body 20 has the installation space 201 in which the supply line 22 is pre-installed. The supply line 22 is in through-connection with the supply pipe connection 4. Several nozzles 23 are arranged on the inner wall 202 of the basin body 20 and each is connected to the supply line 22, with the nozzle openings 23 being directed towards the center of the basin body 20. After the nozzles 23 have been installed with the supply line 22, a sealing sleeve is attached to the supply line 22.The sealing sleeve is made of artificial leather and is fixed to the delivery line 22 after being attached, so that water can be poured into the basin body 20.

[0036] The soft bathtub is further equipped with a return pipe connection 3 and a supply pipe connection 4. One side of the return pipe connection 3 is connected to the return line 21 and the filter 24, while the other side is connected to the first pipe 15 of the control center housing 1. One side of the supply pipe connection 4 is in through-connection to the delivery line 22, while the other side is connected to the second pipe 16 of the control center housing 1. A return opening 203 is arranged on the inner wall 202 of the pool body 20. The return opening 203 is connected to the return pipe connection 3 via the return line 21. The filter 24 is arranged on the return line 21. The return opening 203 serves to draw water from the pool body 20. The filter 24 comprises a filter housing 242 with a filter inlet 242a and a filter outlet 242b.The filter inlet 242a is in through-connection with the basin body 20, and the filter outlet 242b is connected to the return line 21.

[0037] As in Fig. As shown in Figure 4, the soft bathtub comprises the basin body 20, in which the delivery line 22 is arranged. The nozzles 23 are arranged on the inner wall of the basin body 20 and are in through-connection with the delivery line 22. The return opening 203, which is connected to the filter 24, is located on the inner wall of the basin body 20. A heater 122, a UV sterilizer 13, a water pump 14, the return pipe connection 3, and the supply pipe connection 4 are connected outside the basin body 20. One side of the return pipe connection 3 is connected to the filter 24 via the return line 21, while the other side is connected to the control center housing 1 via the first pipe 15. One side of the supply pipe connection 4 is connected to the delivery line 22, while the other side is connected to the control center housing 1, thus creating a water circuit. The water pump 14 draws the water out of the basin body 20.The water flows through the filter 24 to the return pipe connection 3, then successively through the heating unit 122 and the UV sterilizer 13. Finally, the water is directed via the supply pipe connection 4 through the delivery line 22 to the nozzles 23 and expelled.

[0038] As in Fig. 2 and Fig. As shown in Figure 4, the soft bathtub further comprises a ventilation pipe connection 5 and a ventilation line 25 arranged in the installation space 201, which is connected to at least one of the several nozzles 23. The control center housing 1 also includes a ventilation system 17 arranged in the receiving opening 101 and enclosed by an insulating layer 11. The ventilation system 17 comprises: an air valve 171, a control switch 172, and a third pipe 173 connected to the air valve 171. The control switch 172 is electrically connected to the air valve 171 to control the operating state of the air valve 171. The ventilation pipe connection 5 connects the ventilation line 25 to the third pipe 173 and is arranged on the ventilation line 25. When the control switch 172 is open, the air is connected to the high-pressure water lines.The higher water pressure allows the control of the discharge force of the water exiting the nozzles 23 (large nozzle 231 and small nozzle 232).

[0039] As in Fig. As shown in Figure 2, the ventilation pipe connection 5 comprises a first connecting pipe 51, a second connecting pipe 52, a first valve 53, and a first flange 54. The first connecting pipe 51 and the second connecting pipe 52 are connected to each other by the first valve 53. The first connecting pipe 51 can be detachably connected to a third pipe 173 via the first flange 54, and the second connecting pipe 52 can be detachably connected to the ventilation line 25 via the first flange 54.

[0040] As in Fig. As shown in Figure 2, both the return pipe connection 3 and the supply pipe connection 4 each comprise a connection housing 26, a second valve 27, and a second flange 28. The connection housing 26 is located on the water pump 14, and the second valve 27 can be detachably connected to the connection housing 26 via the second flange 28. Specifically, the connection housing 26 of the return pipe connection 3 is located at the inlet of the water pump 14, and the return line 21 can be detachably connected to the second valve 27 via the second flange 28. The first pipe 15 is in through-connection with the connection housing 26 of the return pipe connection 3. The connection housing 26 of the supply pipe connection 4 is located at the outlet of the water pump 14, and the delivery line 22 can be detachably connected to the second valve 27 via the second flange 28.The second pipe 16 is in through connection with the connection housing 26 of the supply pipe connection 4.

[0041] As in Fig. As shown in Figure 4, the bathtub container 20 is manufactured using a composite technique with hot-melt foam, employing both soft and stable foam to enhance user comfort. The exterior of the bathtub container 20 is hot-fused with woven IXPE foam fabric to improve structural strength and insulation performance. A base is installed on the underside of the bathtub container 20, which hot-fuses the XPE insulation material to the container to ensure the stability and insulation of the overall structure. A seat cushion is also attached to the inner wall of the bathtub container 20, forming a single unit and further enhancing usability and comfort. This soft bathtub is recyclable and environmentally friendly, thus having a positive impact on the environment.A protective cover 29 is attached to the outside of the tub container 204, enclosing the tub container 20. The inner lining of the protective cover 29 is bonded to the woven fabric. The inner lining of the protective cover 29 is made of glossy PVC film, while the outer cover is made of synthetic leather, which guarantees both water resistance and enhances the material's comfort.

[0042] As in Fig. 5 and Fig. As shown in Figure 6, the filter 24 comprises a filter mesh 241 and a hollow filter body 242, which has both a filter inlet 242a and a filter outlet 242b. The filter mesh 241 is attached to the filter inlet 242a, and the filter outlet 242b is connected to the return pipe 21. The filter body 242 has an "L" shape and is filled with filter wool 244. This filter wool 244 absorbs impurities from the water. When the filter wool 244 has absorbed a large amount of impurities, the filter mesh 241, located at the filter inlet 242a, can be opened. The user can then remove the filter wool 244 from the filter inlet 242a. The filter wool 244 from the filter inlet 242a is removed together with the filter wool 244 in the filter outlet 242b, and new filter wool 244 is introduced back into the filter inlet 242a.In this way, the filter wool 244 is guided through the filter inlet 242a and the filter outlet 242b, ensuring that both inlet and outlet areas of the filter are filled with filter wool 244. This facilitates handling for the user and ensures continuous and stable filtration performance.

[0043] As in Fig. As shown in Figure 7, the filter 24 also includes a mounting ring 243, which is installed at the filter inlet 242a. The filter mesh 241 is rotatably connected to the mounting ring 243, and the filter mesh 241 is equipped with a rotating plate 241a. When the rotating plate 241a is rotated, the filter mesh is unlocked or locked relative to the mounting ring 243. The mounting ring 243 is connected to the filter inlet 242a by a precisely fitting connection. The filter 24 is filled with filter wool 244, which is used for filtration.

[0044] Operating principle: Water is poured into the tank 20, and the control unit 121 receives a signal. The water pump 14 is initially started to supply the entire water system with energy. When the water pump 14 starts, the water stored in the tank 20 is drawn into the filter 24 via the return inlet 203. The water passes successively through the filter wool 244 inside the filter 24, thus purifying it. The filtered water is partially directed via the return pipe connection 3 to the heater 122, where it is heated, and partially to the UV disinfection unit 13, where it is disinfected. The heated and disinfected water then flows via the return pipe connection 3 into the transport pipe 22 to ensure that the water sprays evenly and continuously through the small nozzles 232 and large nozzles 231.This forms a closed water circulation system that is environmentally friendly, energy efficient, lightweight, comfortable and clean.

[0045] The embodiments described above represent the preferred embodiment of the present invention and are not intended to limit the invention. Experts in the relevant field may make customary modifications and substitutions within the scope of protection of the invention, which shall also fall within its scope of protection. Reference symbol list 1 Control center housing 2 bathtub bodies 3 Return pipe connection 4 Flow pipe connection 5 Ventilation pipe connection 10 cases 11 Insulating layer 12 Tax system 13 UV sterilizer 14 Water pump 15 first pipe 16 second pipe 17 Ventilation system 18 silencers 19 loudspeakers 20 pelvic bodies 21 Return line 22 Conveyor line 23 nozzle 24 filters 25 Ventilation line 26 connection housings 27 second valve 28 second flange 29 Sealing sleeve 51 first connecting pipe 52 second connecting pipe 53 first valve 54 first flange 101 Intake opening 121 Controller 122 Heating unit 122a Heating compartment 123 Control panel 124 cables 131 Sterilization compartment 141 Outer wall of the water pump housing 142 pipe coils 142a Inlet of the pipe coil 142b Outlet of the coil 143 Two-speed engine 171 Air valve 172 control switches 173 third pipe 201 Installation space 202 Inner wall of the pelvic body 203 Return opening 204 Outer wall of the pelvic body 231 Large nozzle 232 Small nozzle 241 sieve 241a Slider 242 filter housings 242a Filter inlet 242b Filter outlet 243 Mounting ring 244 filter wools.

Claims

[1] A soft bathtub, characterized by : a control center housing (1), a bathtub body (2), a return pipe connection (3) and an outlet pipe connection (4), wherein the control center housing (1) comprises a first pipe (15) and a second pipe (16), the bathtub body (2) comprises: a tub container (20) with an installation chamber (201), wherein the inner wall (202) of the container has a return hole (203); a return pipe (21) and a transport tube (22) arranged in the installation chamber (201), wherein the return hole (203) is connected to the return pipe connection (3) via the return pipe (21), and the transport tube (22) is connected to the outlet pipe connection (4); several nozzles (23) arranged on the inner wall (202) of the container and connected to the transport tube (22); and a filter (24) which is arranged in the installation chamber (201) and is installed in the return pipe (21); The return pipe connection (3) is connected to the first pipe (15) and the return pipe (21), the outlet pipe connection (4) is connected to the second pipe (16) and the transport tube (22), and the control center housing (1) receives water from the bathtub body (2) via the return pipe (21) and directs it back to the bathtub body (2) via the transport tube (22), thus forming a closed water circulation path. [2] The soft bathtub according to claim 1, characterized by , that the control center housing (1) additionally includes: a housing (10) with a receiving chamber (101); an insulating layer (11) that is attached to the inner wall of the housing (10); and a control system (12), a UV disinfection device (13) and a water pump (14) arranged in the receiving chamber (101) and enclosed by the insulating layer (11), wherein the control system (12) comprises a controller (121) and a radiator (122) with a heating chamber (122a), wherein the controller (121) is electrically connected to the radiator (122), the water pump (14) and the UV disinfection device (13), the UV disinfection device (13) includes a disinfection chamber (131), and the heating chamber (122a) and the disinfection chamber (131) are connected between the first pipe (15) and the second pipe (16), wherein the water pump (14) circulates the water through the first pipe (15), the disinfection chamber (131), the heating chamber (122a) and the second pipe (16), forming a water circulation path. [3] The soft bathtub according to claim 2, characterized by, that the bathtub body (2) additionally comprises a ventilation pipe connection (5) and a ventilation pipe (25) which is arranged in the installation chamber (201), wherein the ventilation pipe (25) is connected to at least one of the nozzles (23); The control center housing (1) additionally comprises a ventilation system (17) arranged in the receiving chamber (101) and enclosed by the insulating layer (11), wherein the ventilation system (17) comprises: an air valve (171), a control switch (172) and a third tube (173) connected to the air valve (171), the control switch (172) being electrically connected to the air valve (171) to control its operating state; The ventilation pipe connection (5) connects the ventilation pipe (25) and the third pipe (173). [4] The soft bathtub according to claim 3, characterized by, that the ventilation pipe connection (5) comprises a first connecting hose (51), a second connecting hose (52), a first valve (53) and a first quick-release area (54), wherein the first connecting hose (51) and the second connecting hose (52) are connected through the first valve (53), and the first connecting hose (51) and the second connecting hose (52) are each detachably connected through the first quick-release area (54) to the third pipe (173) and the ventilation pipe (25). [5] The soft bathtub according to claim 1, characterized by , that the return pipe connection (3) and the outlet pipe connection (4) each comprise a connection body (26), a second valve (27) and a second quick-release area (28), wherein the connection body (26) is attached to the water pump (14) and the second valve (27) is detachably connected to the connection body (26) via the second quick-release area (28). [6] The soft bathtub according to claim 1, characterized by , that the tub container (20) is produced by hot melt bonding of composite pearl foam, wherein the tub container (20) is provided with a covering (29) which is coated on the inside of the outer wall (204) of the tub container with a material of glossy PVC film and on the outside with artificial leather, and a woven fabric is hot melt bonded to the outer wall of the container (204), wherein the fabric is arranged between the covering (29) and the tub container (20), and the fabric consists of IXPE foam. [7] The soft bathtub according to claim 1, characterized by , that the filter (24) comprises a screen (241) and a hollow filter housing (242) having a filter inlet (242a) and a filter outlet (242b), wherein the filter housing (242) has an L-shape, the screen (241) is attached to the filter inlet (242a) and the filter outlet (242b) is connected to the return pipe (21). [8] The soft bathtub according to claim 7, characterized by , that the filter (24) additionally comprises a fixing circle (243) which is attached to the filter inlet (242a), wherein the sieve (241) is detachably connected to the fixing circle (243), and the sieve (241) has a rotating disk (241a) with which the sieve (241) is unlocked or locked when the rotating disk (241a) is turned relative to the fixing circle (243). [9] The soft bathtub according to claim 7, characterized by , that the filter (24) is filled with filter wool (244) for filtration inside.

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