Heat preservation circulating water bathtub

Abstract

The utility model provides a heat preservation circulating water bathtub which comprises an inner bathtub body and further comprises an outer bathtub body and a connecting part, the inner bathtub body is located in the outer bathtub body, one side of the connecting part is connected with the outer wall of the inner bathtub body, the other side of the connecting part is connected with the inner wall of the outer bathtub body, and a heat preservation cavity is formed among the outer bathtub body, the connecting part and the inner bathtub body. The heat preservation cavity is filled with a foaming heat preservation layer, and the purpose of improving the heat preservation performance is achieved.

Description

Technical Field

[0001] This utility model relates to bathtubs, and more particularly to a heat-insulating circulating water bathtub. Background Technology

[0002] Currently, there are various types of bathtubs on the market designed to provide a comfortable user experience. Patent CN202223113U discloses a bathtub with a tub basin, its structure including an annular sidewall and a bottom. To enhance comfort and stability for the user within the bathtub, a protrusion is specifically provided on the bottom surface, with a recess on each side; simultaneously, a raised portion is also provided on the sidewall. These designs aim to provide appropriate body support for the user and effectively prevent the user from slipping in the bathtub during water filling or use, thereby reducing the risk of loss of control and improving safety.

[0003] However, existing bathtubs of this type typically have solid side walls. While structurally simple, these solid side walls offer poor heat retention. During use, the hot water in the bathtub loses heat quickly through the side walls, causing the water temperature to drop rapidly. Users need to frequently add hot water to maintain the desired temperature, which not only wastes energy but also negatively impacts the experience of a long, comfortable bath. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a heat-insulating circulating water bathtub to improve heat retention.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a heat-insulating circulating water bathtub, including an inner cylinder, an outer cylinder, and a connecting part. The inner cylinder is located inside the outer cylinder. One side of the connecting part is connected to the outer wall of the inner cylinder, and the other side of the connecting part is connected to the inner wall of the outer cylinder. A heat-insulating cavity is formed between the outer cylinder, the connecting part, and the inner cylinder. The heat-insulating cavity is filled with a foamed heat-insulating layer.

[0006] To achieve the above technical solution, an insulation cavity is formed by the inner and outer tubs and the connecting parts. A foamed insulation layer is then injected into this cavity and allowed to expand and solidify. This foamed insulation layer creates an effective heat insulation barrier, significantly reducing the rate at which heat is transferred from the hot water in the bathtub to the external environment. Therefore, the water temperature in the bathtub can remain warm for a longer period, solving the problem of rapid heat loss in solid-walled bathtubs in existing technologies, and improving the user's experience of comfortable bathing for extended periods and the bathtub's insulation performance.

[0007] As a preferred embodiment of this utility model, a drain hole is provided on the bottom wall of the inner cylinder, and a drain device is provided in the drain hole. A drain pipe is fixedly connected to the side wall of the outer cylinder, and the end of the drain pipe away from the outer cylinder is fixed to the bottom surface of the inner cylinder. The drain hole is located inside the drain pipe.

[0008] To achieve the above technical solution, when the user opens the drain valve to drain water, the water in the inner cylinder will flow out through the drain hole on the bottom wall. Since this drain hole is located inside the drain pipe, the water flow is directly guided into the drain pipe. The water flows downwards along the drain pipe and finally exits from the side wall of the outer cylinder. This provides a stable and sealed drainage channel, ensuring that the water flow reliably through the insulation cavity, effectively preventing water leakage into the foam insulation layer, thereby protecting the performance of the foam insulation layer; at the same time, the fixed connection between the drain pipe and the inner and outer cylinders enhances the stability and integration of the entire drainage structure.

[0009] As a preferred embodiment of this utility model, a water inlet is provided on the side wall of the inner cylinder, and a water inlet pipe is fixedly connected inside the water inlet. The ends of the multiple water inlet pipes are connected to a main water pipe through a distributor. The main water pipe is fixed to the side wall of the outer cylinder. A water outlet is provided on the side wall of the inner cylinder, and a water outlet pipe is fixed to the water outlet. The end of the water outlet pipe away from the water outlet is fixed to the side wall of the outer cylinder. The horizontal height of the water inlet is higher than the horizontal height of the water outlet.

[0010] To achieve the above technical solution, water first enters the main water pipe, is distributed to the inlet pipe by a distributor, and is injected into the bathtub from the higher inlet. Water inside the bathtub flows out from the outlet at the lower position on the inner wall of the tub, enters the outlet pipe, and is then discharged through the outlet pipe. This helps to create a more effective water circulation field inside the bathtub, promoting more uniform water temperature.

[0011] As a preferred embodiment of this utility model, it also includes a water tank and a water pump. A water injection pipe connected to the water outlet pipe is fixedly connected to the inner wall of the water tank. A multi-layer filter is provided on the water injection pipe. The water inlet of the water pump is connected to the water tank, and the water outlet of the water pump is connected to the main water pipe.

[0012] To achieve the above technical solution, bathwater flows from the outlet pipe into the inlet pipe, where it is effectively purified by a multi-layer filter. The filtered water collects in the water tank, where a water pump draws and pressurizes the filtered water before sending it into the main water pipe, completing the water circulation. The configuration of the water tank, pump, and multi-layer filter creates a highly efficient and reliable circulating filtration unit, ensuring continuous water flow in the bathtub and removing impurities, significantly improving the hygiene of bathing water and providing users with a clean and healthy circulating hot water bathing experience.

[0013] In a preferred embodiment of this utility model, the multi-layer filter includes a filter frame, a first filter screen, and a second filter screen. A support ring is fixedly connected to the end of the water inlet pipe away from the water outlet pipe. A fixing ring threadedly connected to the end of the filter frame is fixedly connected to the end of the filter frame. A positioning ring is fixedly connected to the inner wall of the filter frame. The first filter screen is placed on the positioning ring and connected to the positioning ring through a magnetic component. Multiple positioning shafts are rotatably connected to the end of the filter frame away from the support ring. A positioning block is fixedly connected to the outer wall of the positioning shaft. The positioning shaft rotates and causes the positioning block and the filter frame to abut against both sides of the second filter screen.

[0014] To achieve the above technical solution, the water to be filtered enters the filter frame through the water inlet pipe. It first passes through a first filter screen placed on a positioning ring and fixed using magnetic components, achieving initial interception of larger particles in the water. Subsequently, the water flows through a second filter screen for finer filtration. Addressing the technical challenge of the second filter screen, being thinner, easily loosening or falling off under water flow impact, a structure of multiple rotating positioning shafts and positioning blocks is employed. Through rotation, the positioning blocks firmly press against the second filter screen, reliably fixing it to the end of the filter frame, forming effective water pressure resistance. This ensures that the second filter screen can still filter stably and accurately under high-pressure circulating water flow, preventing displacement or damage. The staged filtration design significantly improves water purification efficiency, while the innovative magnetic connection facilitates quick disassembly and cleaning of the first filter screen, significantly enhancing the durability and maintenance convenience of the entire filter.

[0015] As a preferred embodiment of this utility model, the positioning shaft includes a shaft body, an elastic groove and a barb. A T-shaped hole is provided on the filter frame. One end of the shaft body is fixedly connected to the barb, and the other end of the shaft body is fixedly connected to the positioning block. The elastic groove is provided on the shaft body. The shaft body passes through the T-shaped hole and the barb is placed in the T-shaped hole.

[0016] To achieve the above technical solution, during assembly, the shaft is inserted into the T-shaped hole of the filter frame. The deformation of the elastic groove allows the barb to pass through the narrow part of the T-shaped hole, and after entering the wider area of ​​the hole, it elastically recovers, locking the barb inside the T-shaped hole. In this way, the positioning shaft forms a secure yet rotatable connection with the T-shaped hole through the barb. This structure ensures that the positioning shaft will not easily fall off the filter frame, while simultaneously allowing smooth rotation to drive the positioning block, thereby reliably pressing and fixing the thinner second filter screen. This enhances the installation stability and resistance to water flow impact of the second filter screen, and simplifies the assembly process.

[0017] In a preferred embodiment of this utility model, the magnetic component includes a first magnet and a second magnet, which attract each other. The first magnet is fixed to a first filter screen, and the second magnet is fixed to a positioning ring. The first magnet and the second magnet are arranged correspondingly.

[0018] To achieve the above technical solution, during installation, the first filter screen with the first magnet is placed on the positioning ring with the second magnet. The mutual attraction between the first and second magnets firmly attracts and fixes the first filter screen to the positioning ring. This magnetic connection design enables tool-free quick installation and removal of the first filter screen, greatly simplifying daily maintenance and cleaning operations and improving convenience.

[0019] As a preferred embodiment of this utility model, the two ends of the positioning block are provided with guide slopes for contacting the second filter screen.

[0020] To achieve the above technical solution, when the positioning shaft rotates and drives the positioning block, the guide slope first contacts the outer wall or edge of the second filter screen. As the positioning block continues to rotate, the guide slope guides the surface of the positioning block to press against the side of the second filter screen facing away from the filter frame, thereby achieving rapid positioning of the second filter screen.

[0021] In a preferred embodiment of this invention, the mesh count of the second filter is greater than that of the first filter.

[0022] To achieve the above technical solution, the water first undergoes preliminary filtration through a first filter screen with relatively large pores, primarily intercepting larger particulate impurities in the water. Subsequently, the water flowing through the first filter screen passes through a second filter screen with smaller pores and higher filtration precision to remove even finer impurities. This staged filtration method, from coarse to fine, effectively reduces the filtration burden on the second filter screen, preventing premature clogging by large particles and thus extending its service life. It also improves the overall filtration efficiency of the entire filter and the cleanliness of the effluent water. Attached Figure Description

[0023] Figure 1 To illustrate the structural diagram of the inner cylinder block;

[0024] Figure 2 This is a schematic diagram illustrating the bottom structure of the outer cylinder block;

[0025] Figure 3 This diagram illustrates the location of the foamed insulation layer.

[0026] Figure 4 To illustrate the structural diagram of the water injection pipe;

[0027] Figure 5 To illustrate the structural diagram of the magnetic component;

[0028] Figure 6 To illustrate the structural diagram of the filter frame;

[0029] Figure 7 To illustrate the structure of the positioning shaft;

[0030] Figure 8 A schematic diagram illustrating the external structure of a multilayer filter;

[0031] Figure 9 for Figure 8 Enlarged view of point A;

[0032] Figure 10 This is a schematic diagram of the T-shaped hole structure;

[0033] Figure 11 This is a schematic diagram of the external structure of this utility model;

[0034] Figure 12 A diagram showing the location of the water pump;

[0035] Figure 13 This is a schematic diagram showing the bottom structure of the water tank.

[0036] Reference numerals: 1. Inner cylinder; 2. Outer cylinder; 3. Connecting part; 4. Insulation cavity; 5. Foamed insulation layer; 6. Drain hole; 7. Drain assembly; 8. Drain pipe; 9. Inlet; 10. Inlet pipe; 11. Diverter; 12. Outlet; 13. Outlet pipe; 14. Inlet pipe; 15. Multi-layer filter; 16. Filter frame; 17. First filter screen; 18. Second filter screen; 19. Support ring; 20. Fixing ring; 21. Positioning ring; 22. Magnetic assembly; 23. First magnet; 24. Second magnet; 25. T-shaped hole; 26. Positioning shaft; 27. Shaft body; 28. Elastic groove; 29. ​​Barb; 30. Guide slope; 31. Holding plate; 32. Main water pipe; 33. Positioning block; 34. Water tank; 35. Water pump. Detailed Implementation

[0037] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0038] A heat-insulating circulating water bathtub includes an inner cylinder 1, an outer cylinder 2, and a connecting part 3. The inner cylinder 1 is located inside the outer cylinder 2. One side of the connecting part 3 is fixedly connected to the outer wall of the inner cylinder 1, and the other side of the connecting part 3 is fixedly connected to the inner wall of the outer cylinder 2. A heat-insulating cavity 4 is formed between the outer cylinder 2, the connecting part 3, and the inner cylinder 1, and a foamed insulation layer 5 is filled in the heat-insulating cavity 4. The outer cylinder 2, the connecting part 3, and the inner cylinder 1 are integrally formed. The foamed insulation layer 5 is polyurethane foam.

[0039] A drain hole 6 is provided on the bottom wall of the inner cylinder 1, and a drain device 7 is installed in the drain hole 6. The drain device 7 is existing technology. A drain pipe 8 is fixedly connected to the side wall of the outer cylinder 2. The end of the drain pipe 8 away from the outer cylinder 2 is fixed to the bottom surface of the inner cylinder 1, and the drain hole 6 is located inside the drain pipe 8.

[0040] Two water inlets 9 are provided on the side wall of the inner cylinder 1, located on opposite side walls of the inner cylinder 1. Water inlet pipes 10 are fixedly connected to the water inlets 9. The ends of the two water inlet pipes 10 are connected to a main water pipe 32 via a distributor 11, which is Y-shaped. The main water pipe 32 is fixed to the side wall of the outer cylinder 2.

[0041] A water outlet 12 is provided on the side wall of the inner cylinder 1, and a water outlet pipe 13 is fixed to the water outlet 12. The end of the water outlet pipe 13 away from the water outlet 12 is fixed to the side wall of the outer cylinder 2. The horizontal height of the water inlet 9 is higher than the horizontal height of the water outlet 12.

[0042] A water inlet pipe 14, which is connected to the water outlet pipe 13, is fixedly connected to the water tank 34. A multi-layer filter 15 is installed on the water inlet pipe 14. The water inlet end of the water pump 35 is connected to the bottom wall of the water tank 34, and the water outlet end of the water pump 35 is connected to the main water pipe 32.

[0043] Hot water is injected into the water tank 34. After the water pump 35 is turned on, the hot water is pumped into the main water pipe 32 and then into the inner cylinder 1 through the inlet pipe 10. Then, the dirty water after showering enters the water injection pipe 14 from the outlet pipe 13, and after being filtered by the multi-layer filter 15, it is injected into the water tank 34, thus realizing water circulation.

[0044] After showering, drain the water through drain 7.

[0045] The water tank 34 is at a lower level than the bathtub.

[0046] The multi-layer filter 15 includes a filter frame 16, a first filter screen 17, and a second filter screen 18. A support ring 19 is fixedly connected to the end of the water inlet pipe 14 away from the water outlet pipe 13, and a fixing ring 20, threadedly connected to the support ring 19, is fixedly connected to the end of the filter frame 16. The filter frame 16 is vertically arranged. The first filter screen 17 has a mesh size of 20, and the second filter screen 18 has a mesh size of 50.

[0047] A positioning ring 21 is integrally connected to the inner wall of the filter frame 16, forming a step between the positioning ring 21 and the inner wall of the filter frame 16. The first filter screen 17 is placed on the positioning ring 21 and connected to the positioning ring 21 through a magnetic component 22. The positioning ring 21 is located in the middle of the filter frame 16.

[0048] The magnetic component 22 includes a first magnet 23 and a second magnet 24. The first magnet 23 and the second magnet 24 attract each other. The first magnet 23 is fixed to the first filter screen 17, and the second magnet 24 is fixed to the positioning ring 21. The first magnet 23 and the second magnet 24 are arranged correspondingly. Both the first magnet 23 and the second magnet 24 are annular.

[0049] Three T-shaped holes 25 are provided at the end of the filter frame 16 away from the support ring 19. A positioning shaft 26 is rotatably connected within each T-shaped hole 25, and the three positioning shafts 26 are evenly distributed along the axis of the filter frame 16. Each positioning shaft 26 includes a shaft body 27, an elastic groove 28, and a barb 29. One end of the shaft body 27 is fixedly connected to the barb 29, and the other end is fixedly connected to the positioning block 33. The elastic groove 28 is formed on the shaft body 27, and its length direction is along the length direction of the shaft body 27. The shaft body 27 passes through the T-shaped hole 25, and the barb 29 is positioned within the T-shaped hole 25.

[0050] The shaft 27, barb 29, and positioning block 33 are integrated into one unit.

[0051] The positioning shaft 26 rotates and causes the positioning block 33 and the filter frame 16 to abut against both sides of the second filter screen 18. Guide slopes 30 are provided at both ends of the positioning block 33 for contacting the edges of the second filter screen 18.

[0052] A gripping plate 31 is integrally provided at the end of the shaft 27 away from the barb 29.

[0053] In use, first, hot water is poured into the water tank 34. Then, the water pump 35 is turned on. The water pump 35 draws hot water from the bottom of the water tank 34 and pumps the pressurized hot water through its outlet into the main water pipe 32 fixed to the side wall of the outer tub 2. The main water pipe 32 distributes the hot water to two inlet pipes 10 connected to opposite positions on the side wall of the inner tub 1 via a Y-shaped distributor 11. The hot water is then sprayed into the bathtub from the higher inlet 9 through the inlet pipes 10, forming a circulating water flow.

[0054] After showering, the water flows out from the outlet 12 located at the lower part of the side wall of the inner tank 1 and enters the water inlet pipe 14, which is connected to the outlet pipe 13. The water flows through the water inlet pipe 14 and then enters the multi-layer filter 15. In the multi-layer filter 15, the water first passes through the first filter screen 17 with a lower mesh size for preliminary filtration, intercepting larger particulate impurities. Then, the water flows through the second filter screen 18 with a higher mesh size to remove even finer suspended matter, thus purifying the water. The filtered water is then injected into the water tank 34, completing a cycle. Throughout the showering process, the water pump 35 operates continuously, achieving water circulation and purification.

[0055] After bathing, water flows out through the drain hole 6 located inside the drain pipe 8 via the drain device 7 on the bottom wall of the inner tub 1, and is connected to the external drainage system via the drain pipe 8 fixed to the side wall of the outer tub 2, thus emptying the water in the bathtub.

[0056] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A heat-insulating circulating water bathtub, comprising an inner tub (1), characterized in that: It also includes an outer cylinder (2) and a connecting part (3). The inner cylinder (1) is located inside the outer cylinder (2). One side of the connecting part (3) is connected to the outer wall of the inner cylinder (1), and the other side of the connecting part (3) is connected to the inner wall of the outer cylinder (2). A heat insulation cavity (4) is formed between the outer cylinder (2), the connecting part (3) and the inner cylinder (1). The heat insulation cavity (4) is filled with a foamed heat insulation layer (5).

2. The insulated circulating water bathtub according to claim 1, characterized in that: The inner cylinder (1) has a drain hole (6) on its bottom wall and a drainer (7) inside the drain hole (6). The outer cylinder (2) has a drain pipe (8) fixedly connected to its side wall. The end of the drain pipe (8) away from the outer cylinder (2) is fixed to the bottom surface of the inner cylinder (1). The drain hole (6) is located inside the drain pipe (8).

3. The insulated circulating water bathtub according to claim 1, characterized in that: The inner cylinder (1) has an inlet (9) on its side wall. An inlet pipe (10) is fixedly connected inside the inlet (9). The ends of the multiple inlet pipes (10) are connected to a main water pipe (32) through a distributor (11). The main water pipe (32) is fixed to the side wall of the outer cylinder (2). The inner cylinder (1) has an outlet (12) on its side wall. An outlet pipe (13) is fixed to the outlet (12). The end of the outlet pipe (13) away from the outlet (12) is fixed to the side wall of the outer cylinder (2). The horizontal height of the inlet (9) is higher than the horizontal height of the outlet (12).

4. A heat-insulating circulating water bathtub according to claim 3, characterized in that: It also includes a water tank (34) and a water pump (35). The inner wall of the water tank (34) is fixedly connected to a water injection pipe (14) that communicates with the water outlet pipe (13). The water injection pipe (14) is equipped with a multi-layer filter (15). The water inlet of the water pump (35) is connected to the water tank (34), and the water outlet of the water pump (35) is connected to the main water pipe (32).

5. A heat-insulating circulating water bathtub according to claim 4, characterized in that: The multi-layer filter (15) includes a filter frame (16), a first filter screen (17), and a second filter screen (18). A support ring (19) is fixedly connected to one end of the water inlet pipe (14) away from the water outlet pipe (13). A fixing ring (20) threadedly connected to the end of the filter frame (16) is fixedly connected to the end of the filter frame (16). A positioning ring (21) is fixedly connected to the inner wall of the filter frame (16). The first filter screen (17) is placed on the positioning ring (21) and connected to the positioning ring (21) through a magnetic component (22). A plurality of positioning shafts (26) are rotatably connected to one end of the filter frame (16) away from the support ring (19). A positioning block (33) is fixedly connected to the outer wall of the positioning shaft (26). The positioning shaft (26) rotates and causes the positioning block (33) and the filter frame (16) to abut against the two sides of the second filter screen (18) respectively.

6. A heat-insulating circulating water bathtub according to claim 5, characterized in that: The positioning shaft (26) includes a shaft body (27), an elastic groove (28), and a barb (29). A T-shaped hole (25) is provided on the filter frame (16). One end of the shaft body (27) is fixedly connected to the barb (29), and the other end of the shaft body (27) is fixedly connected to the positioning block (33). The elastic groove (28) is provided on the shaft body (27). The shaft body (27) passes through the T-shaped hole (25) and the barb (29) is placed in the T-shaped hole (25).

7. A heat-insulating circulating water bathtub according to claim 5, characterized in that: The magnetic component (22) includes a first magnet (23) and a second magnet (24). The first magnet (23) and the second magnet (24) attract each other. The first magnet (23) is fixed on the first filter screen (17), and the second magnet (24) is fixed on the positioning ring (21). The first magnet (23) and the second magnet (24) are arranged correspondingly.

8. A heat-insulating circulating water bathtub according to claim 5, characterized in that: The positioning block (33) has guide slopes (30) at both ends for contacting the second filter (18).

9. A heat-insulating circulating water bathtub according to claim 5, characterized in that: The mesh count of the second filter (18) is greater than that of the first filter (17).

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