Steam chamber physiotherapy couch

Abstract

The utility model discloses a novel steaming bed which comprises a bed body, a water tank and a steam generator, a steam chamber communicated with the steam generator is arranged on the upper portion of the bed body, a porous screen plate is arranged on the steam chamber, and at least one containing cavity is arranged on the porous screen plate. One end of the steam generator is connected with the water tank through a water inlet pipe, and at least one exhaust pipe extending into the steam chamber is arranged at the other end of the steam generator; and a return pipe is arranged at the bottom of the steam chamber and is connected to the water tank. The independent steam chamber is arranged in the bed body, high-temperature steam is directly provided for the steam chamber through the steam generator, the high-temperature steam is utilized to enable the traditional Chinese medicine bags in the porous screen plate and the containing cavity to be evenly heated and not prone to mildewing, and the independent external water tank is adopted to supply water to the steam generator to generate steam. Therefore, the water can be heated according to the required amount of steam, and the water heater can be started and stopped immediately, so that the temperature rise is quick, and excessive energy waste is avoided.

Description

Technical field:

[0001] The utility model relates to the technical field of sweat steaming therapy, in particular to a steam room therapy bed. Background technology:

[0002] At present, there are two common physiotherapy beds on the market. One is a moxibustion bed, which uses direct combustion of moxibustion columns and uses the smoke generated by the combustion of moxibustion columns for moxibustion sweat steaming, such as: a moxibustion sweat steaming bed with a Chinese patent publication number of CN 213723470 U. The patent heats the moxibustion column 13 by igniting the switch 5 to ignite the moxibustion column, so that the moxibustion column smokes, and then heats the moxibustion smoke through the heating tube 19. After heating, the moxibustion smoke continues to rise and contact the skin for sweat steaming. However, since this method will cause the moxibustion column to produce smoke, and the user cannot completely block the smoke outlet slot 18 on the moxibustion bed 1, a large amount of smoke still comes out, causing the indoor smoke solubility to gradually increase, which not only poses a safety hazard, but also cannot control the temperature of the smoke, which is easy to burn the skin, especially after the moxibustion smoke is heated by the heating tube 19, the temperature of the smoke will further increase, which is not suitable for long-term sweat steaming.

[0003] Another type is a steam bed, such as Figure 1 As shown, a large water tank a is used with a built-in heating tube b. The heating tube b heats the water in the water tank a to generate steam, which provides heat to the Chinese medicine bag, commonly known as a "water bed". The biggest disadvantages are long heating time; large waste of waste heat, no energy saving; high steam humidity, the Chinese medicine bag is prone to mold; and there is a safety hazard of easy leakage.

[0004] In view of this, the inventor proposes the following technical solution. Utility model content:

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a steam room physiotherapy bed.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a steam chamber therapy bed, comprising: a bed body, a water tank, and a steam generator, wherein a steam chamber connected to the steam generator is arranged on the upper part of the bed body, a porous mesh plate is arranged on the steam chamber, and at least one accommodating cavity is arranged on the porous mesh plate; one end of the steam generator is connected to the water tank through a water inlet pipe, and the other end of the steam generator is provided with at least one exhaust pipe extending into the steam chamber; a return pipe is arranged at the bottom of the steam chamber and connected to the water tank.

[0007] Furthermore, in the above technical solution, the steam generator is a ring tube heater, which includes a heating tube, a surrounding water channel wrapped around the periphery of the heating tube, and an outer shell covering the outside of the surrounding water channel, and a first water inlet joint and a first air outlet joint connected to the water inlet pipe and the exhaust pipe are respectively provided at both ends of the surrounding water channel.

[0008] Furthermore, in the above technical solution, the heating tube is U-shaped, and both ends of the heating tube extend to the outside of the outer shell and are used to connect the live wire and the neutral wire respectively; the first water inlet connector and the first air outlet connector extend to the outside of the outer shell.

[0009] Furthermore, in the above technical solution, a water supply pump is provided between the steam generator and the water tank, and a silencer nozzle located in the steam chamber is provided at the end of the exhaust pipe.

[0010] Furthermore, in the above technical solution, the steam generator is provided with a thermostat, which is electrically connected to the steam generator terminal; the water supply pump is electrically connected to the frequency converter.

[0011] Furthermore, in the above technical solution, the steam generator is a cup-type heater, which includes a cup body, a heating wire arranged inside the cup body, a second water inlet joint arranged at the bottom of the cup body and used to connect to the water inlet pipe, and a second air outlet interface arranged at the upper end of the cup body and connected to the exhaust pipe, and the height of the heating wire is below the water level line in the water tank.

[0012] Furthermore, in the above technical solution, a temperature controller for preventing dry burning is provided on the outer wall of the steam generator, the water inlet pipe is located at the bottom of the water tank and the steam generator, and connects the water tank and the steam generator, and a silencer nozzle is provided at the end of the exhaust pipe and is located in the steam chamber.

[0013] Furthermore, in the above technical solution, a Chinese medicine bag is placed in the accommodating cavity, a soft bag rack surrounding the periphery of the accommodating cavity is provided at the upper end of the bed, and a temperature sensor for detecting temperature is provided in the steam chamber.

[0014] Furthermore, in the above technical solution, a plurality of accommodating cavities are arranged above the porous mesh plate, a Chinese medicine bag is placed in each of the accommodating cavities, and the bottom of each of the accommodating cavities corresponds to one or more holes of the porous mesh plate.

[0015] Furthermore, in the above technical solution, the water tank and the steam generator are both located below the steam chamber and in the inner cavity of the bed, in which a first support for supporting the water tank and a second support for supporting the steam generator are provided; at least four casters are provided at the bottom of the bed, and a through hole for the user to breathe is provided at one end of the soft bag rack; the bottom of the steam chamber is inclined, and the return pipe is located in the lowest area of ​​the bottom of the steam chamber and above the water tank.

[0016] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] 1. The utility model adopts an independent steam chamber, and high-temperature steam is directly provided to the steam chamber through a steam generator to ensure that the Chinese medicine bag is heated but not easy to mold; an external small water tank is used to heat the required amount of steam and water, which can be turned on and off immediately, with fast heating and no energy waste; the independent steam chamber has a relatively small space, sensitive temperature response, easy control of sweat steaming temperature, and the electrical appliances used are completely separated from the water circuit, which is safe and reliable.

[0018] 2. In the utility model, a surrounding water channel is arranged outside the heating tube. When the water flows through the surrounding water channel, it will be quickly vaporized by the heat generated by the U-shaped heating tube, so that the water entering the steam generator from the water inlet pipe is quickly vaporized and flows out of the steam generator into the exhaust pipe in the form of steam, thereby realizing the rapid generation of steam. The outer shell is arranged outside the surrounding water channel, which not only improves the safety of use and prevents direct contact with the heating tube, but also seals the heating tube and the surrounding water channel, improves the safety performance and can extend the service life of the steam generator.

[0019] 3. The advantage of using a cup-type steam generator in the utility model is that there is no need for power to drive the water flow to circulate. By utilizing the principle of communicating vessels, the water in the water tank will automatically flow into the cup body through the water inlet pipe. By presetting the lowest water level in the water tank to be higher than the uppermost end of the heating wire in the cup body, it is ensured that there is sufficient water to submerge the heating wire. Therefore, the water in the cup body can be directly heated by the heating wire to generate high-temperature steam. The high-temperature steam automatically floats up and passes into the steam chamber through the exhaust pipe, so that the water in the water tank is provided to the steam generator for heating into steam and then passed into the steam chamber without power, thereby realizing the heating of the Chinese medicine bag. Description of the drawings:

[0020] Figure 1 It is a structural schematic diagram of the prior art;

[0021] Figure 2 It is a three-dimensional diagram of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the first embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of a steam generator in Embodiment 1 of the present utility model;

[0024] Figure 5 This is a circuit diagram of the first embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the second embodiment of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the steam generator in the second embodiment of the present utility model. Specific implementation method:

[0027] The utility model is further described below in conjunction with specific embodiments and drawings.

[0028] The working principle of the utility model is: the water in the water tank 2 is directly heated by the steam generator 3 to generate steam which is passed into the steam chamber 4, the porous mesh plate 40 is heated by the high-temperature steam and steamed through the mesh, and after the Chinese medicine bag 7 is placed in the accommodating cavity 400, the porous mesh plate 40 heats the Chinese medicine bag 7 to achieve high-temperature moxibustion or steaming, and the high-temperature steam can directly heat the Chinese medicine bag through the mesh and drive the drug molecules to contact the skin, thereby improving the physical therapy effect, and when the high-temperature steam condenses, it is collected by the steam chamber 4 and discharged into the water tank 2 to achieve water circulation. At the same time, the water vapor content carried in the high-temperature steam is less, which can not only prevent the effect of moxibustion therapy from being affected by too much moisture, but also effectively prevent the Chinese medicine bag 7 from getting moldy.

[0029] See Figures 1 to 7 As shown, a steam room therapy bed comprises: a bed body 1, a water tank 2, and a steam generator 3. A steam room 4 connected to the steam generator 3 is arranged on the upper part of the bed body 1, and a porous mesh plate 40 is arranged on the steam room 4, and at least one accommodating cavity 400 is arranged on the porous mesh plate 40; one end of the steam generator 3 is connected to the water tank 2 through a water inlet pipe 31, and the other end of the steam generator 3 is provided with at least one exhaust pipe 32 extending into the steam room 4; a return pipe 41 is arranged at the bottom of the steam room 4 and connected to the water tank 2. An independent steam room 4 is arranged in the bed body 1, and high-temperature steam is directly provided to the steam room 4 through the steam generator 3. The high-temperature steam is used to heat the porous mesh plate 40 and the Chinese medicine bag 7 in the accommodating cavity 400 evenly and is not easy to mold, and an independent external water tank 2 is used to supply water to the steam generator 3 to generate steam, so that as much steam as needed can be achieved to heat as much water as needed, and it can be turned on and off immediately, which not only heats up quickly, but also does not waste too much energy. Secondly, the independent steam chamber 4 is used, which not only has a relatively small space, a sensitive temperature response, and easy control of the sweat steaming temperature, but also can ensure that the electrical appliances and the water circuit are completely separated, which is safer and more reliable.

[0030] The Chinese medicine bag 7 is placed in the accommodating cavity 400, the upper end of the bed body 1 is provided with a soft bag frame 10 surrounding the periphery of the accommodating cavity 400, and the steam chamber 4 is provided with a temperature sensor for detecting the temperature. Of course, a plurality of accommodating cavities 400 can be arranged above the porous mesh plate 40, each accommodating cavity 400 is provided with a Chinese medicine bag 7, and the bottom of each accommodating cavity 400 corresponds to one or more holes of the porous mesh plate 40. Among them, the Chinese medicine bag 7 can be a moxibustion bag or other Chinese medicine bags with physical therapy effects.

[0031] The water tank 2 and the steam generator 3 are both located below the steam chamber 4 and in the inner cavity of the bed 1, in which a first support 11 for supporting the water tank 2 and a second support 12 for supporting the steam generator 3 are provided. The water tank 2 and the steam generator 3 are distributed at the tail of the bed 1. At least four casters 13 are provided at the bottom of the bed 1, and a through hole 100 for the user to breathe is provided at one end of the soft bag rack 10; the bottom of the steam chamber 4 is inclined, and the reflux pipe 41 is located at the lowest area of ​​the bottom of the steam chamber 4 and above the water tank 2.

[0032] See Figures 3 to 5 As shown, in the first embodiment, the steam generator 3 is a ring tube heater, which includes a heating tube 3A1, a surrounding water channel 3A2 wound around the outer periphery of the heating tube 3A1, and a shell 3A3 covered on the outside of the surrounding water channel 3A2, and the two ends of the surrounding water channel 3A2 are respectively provided with a first water inlet joint 3A4 and a first gas outlet joint 3A5 connected to the water inlet pipe 31 and the gas outlet pipe 32. The heating tube 3A1 is U-shaped, and the two ends of the heating tube 3A1 extend to the outside of the shell 3A3 and are respectively used to connect the live wire and the neutral wire; the first water inlet joint 3A4 and the first gas outlet joint 3A5 extend to the outside of the shell 3A3. By providing a surrounding water channel 3A2 outside the heating tube 3A1, when water flows through the surrounding water channel, it will be quickly vaporized by the heat generated by the U-shaped heating tube 3A1, so that the water entering the steam generator 3 from the water inlet pipe 31 is quickly vaporized and flows out of the steam generator 3 into the exhaust pipe 32 in the form of steam, thereby achieving rapid steam generation. The outer shell 3A3 is provided outside the surrounding water channel 3A2, not only to improve the safety of use and prevent direct contact with the heating tube 3A1, but also to seal the heating tube 3A1 and the surrounding water channel 3A2, thereby improving the safety performance and extending the service life of the steam generator 3.

[0033] A water supply pump 5 is provided between the steam generator 3 and the water tank 2, and a silencer nozzle 33 located in the steam chamber 4 is provided at the end of the exhaust pipe 32. The water supply pump 5 is provided at the water inlet end of the steam generator 3 to provide water flow velocity, which can not only ensure that there is enough water in the steam generator 3 to prevent dry burning, but also use the high-pressure water flow provided by the water supply pump 5 to greatly increase the amount of steam sprayed from the silencer nozzle 33, and can better control the amount of gas entering the steam chamber 4. At the same time, the silencer nozzle 33 is provided at the end of the exhaust pipe 32, and the silencer nozzle 33 is used to reduce the sound when the steam enters the steam chamber 4, thereby achieving a noise reduction effect.

[0034] The steam generator 3 is provided with a temperature controller 30, and the temperature controller 330 is electrically connected to the terminal of the steam generator 3; the water supply pump 5 is electrically connected to the frequency conversion regulator 6. Figure 5 As shown, in this embodiment, two thermostats 30 are arranged on the steam generator 3. When the steam generator 3 may dry-burn under special circumstances, the two thermostats 30 can simultaneously cut off the neutral and live wires of the steam generator 3 to achieve safety protection.

[0035] The working principle of this embodiment is as follows:

[0036] The water supply pump 5 is connected to the water tank 2 and the steam generator 3 through the water inlet pipe 31. The amount of water entering the steam generator 3 is adjusted by the frequency conversion regulator 6, and then the water content in the steam at the outlet of the exhaust pipe 32 is adjusted. The high-temperature steam generated by the steam generator 3 enters the silencer nozzle 33 of the steam outlet from the exhaust pipe 32, and supplies high-temperature steam to the steam chamber 4. The high-temperature steam heats the Chinese medicine bag 7 on the porous mesh plate 40. When the upper limit temperature required by the Chinese medicine bag 7 is reached, the temperature sensor feedbacks the signal, and the circuit control unit sends an instruction to stop heating. When the temperature drops naturally and drops to the set lower limit temperature, the steam generator 3 restarts to work until it reaches the set temperature upper limit and stops. The condensed water generated by the condensation of steam during the sweat steaming process flows back to the water tank 2 through the return pipe 41. At the same time, a thermostat 30 is installed on the surface of the steam generator 3 to prevent the heater from drying out. When the steam generator 3 may dry out under special circumstances, the zero and fire wires of the steam generator 3 can be cut off at the same time to achieve safety protection.

[0037] See Figure 6 and Figure 7As shown, in the second embodiment, the steam generator 3 is a cup-type heater, which includes a cup body 3B1, a heating wire 3B2 disposed inside the cup body 3B1, a second water inlet joint 3B3 disposed at the bottom of the cup body 3B1 and used to connect the water inlet pipe 31, and a second air outlet interface 3B4 disposed at the upper end of the cup body 3B1 and connected to the exhaust pipe 32, and the height of the heating wire 3B2 is located below the water level line in the water tank 2. The heating wire 3B2 is U-shaped, with both ends passing through the bottom of the cup body 3B1, and respectively used to connect the live wire and the neutral wire. The advantage of using the cup-type steam generator 3 is that there is no need for power to drive the water flow to circulate. By utilizing the principle of communicating vessels, the water in the water tank 2 will automatically flow into the cup body 3B1 through the water inlet pipe 31. By pre-setting the lowest water level in the water tank 2 to be higher than the uppermost end of the heating wire 3B2 in the cup body 3B1, it is ensured that there is enough water to submerge the heating wire 3B2. Therefore, the water in the cup body 3B1 can be directly heated by the heating wire 3B2 to generate high-temperature steam. The high-temperature steam automatically floats up and passes into the steam chamber 4 through the exhaust pipe 32, thereby providing the water in the water tank 2 to the steam generator 3 for heating into steam and then passing into the steam chamber 4 without the need for power, thereby achieving heating of the traditional Chinese medicine bag 7.

[0038] The outer wall of the steam generator 3 is provided with a thermostat 30 for preventing dry burning, the water inlet pipe 31 is located at the bottom of the water tank 2 and the steam generator 3, and connects the water tank 2 and the steam generator 3, and the end of the exhaust pipe 32 is provided with a muffler nozzle 33 located in the steam chamber 4. In this embodiment, the hoop-shaped second bracket 12 is used to vertically fix the cup-shaped steam generator 3 inside the bed body 1.

[0039] The working principle of this embodiment is as follows:

[0040] The steam generator 3 and the water tank 2 are connected by the water inlet pipe 31. When the water level in the water tank 2 reaches the design requirement, the water in the cup body 3B2 will submerge the heating wire 3B2 by utilizing the communicating vessel principle. When the heating wire 3B2 heats the water in the cup body 3B1, high-temperature steam will be generated and flow out upward, and flow to the steam outlet silencer nozzle 33 through the exhaust pipe 32, thereby supplying high-temperature steam to the steam chamber 4 to achieve the purpose of heating the traditional Chinese medicine bag 7. The structure is simple, safe and reliable.

[0041] In summary, the utility model adopts high-temperature steam to heat the Chinese medicine bag 7. Compared with the traditional physiotherapy bed that burns medicinal materials, smokeless moxibustion can be achieved, which is safer, there is no problem of smoke pollution, and there is no risk of combustion and fire. The use of high-temperature steam to heat the Chinese medicine bag 7 can heat more evenly, and the moxibustion effect is better. Secondly, the steam generator 4 is used to directly heat water into high-temperature steam and pass it into the steam chamber 4. Compared with the traditional heating pipe heating in a large water tank to generate steam, the water content in the steam is less, the humidity is less, the looseness and mildew resistance of the Chinese medicine bag 7 can be controlled, and the water and electricity are separated, and the safety is also higher. Of course, for the steam generator 3, it is not limited to the structures disclosed in the above two embodiments. Any steam generator 3 structure that can quickly generate high-temperature steam from water can achieve the purpose of this utility model and belongs to the protection scope of the utility model.

[0042] After adopting the above scheme, the utility model has the following advantages:

[0043] 1. For multifunctional steam generator:

[0044] The utility model adopts two types of steam generators 4, namely, a ring tube heater and a cup heater. These two designs not only provide multiple options to adapt to different usage scenarios and needs, but also enhance the flexibility and practicality of the device. This diversified design enables the steam room therapy bed to better meet the personalized needs of different users.

[0045] 2. Regarding the function of traditional Chinese medicine steam therapy:

[0046] The steam room therapy bed is specially provided with a receiving cavity 400 for placing the Chinese medicine bag 7, so that the user can enjoy the penetration effect of Chinese medicine while undergoing steam therapy. The effective ingredients of Chinese medicine can exist in the form of ions and penetrate the skin and enter the body, thereby achieving the purpose of treating diseases. This design combines traditional Chinese medicine therapy with modern steam therapy technology, providing users with a more comprehensive and effective treatment plan.

[0047] 3. Considering comfort and safety:

[0048] A soft bag frame 100 is provided at the upper end of the bed body 1, surrounding the periphery of the accommodating cavity 400, providing a more comfortable experience for the user. At the same time, a thermostat 30, a water supply pump 5 and an electrically connected frequency converter 6 are provided on the steam generator 4, which can accurately control the temperature and flow of the steam, thereby ensuring the safety of the user. In addition, the cup heater is also equipped with an anti-dry-burning thermostat 30, which further enhances the safety of the device.

[0049] 4. Easy to operate and maintain:

[0050] Casters 13 are provided at the bottom of the bed body 1, so that the steam room therapy bed can be easily moved and convenient for users to use in different positions. At the same time, the inclined design of the bottom of the steam room 4 and the position of the return pipe 41 allow the condensed water to flow back to the water tank 2 smoothly, reducing the workload of maintenance.

[0051] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A steam room therapy bed, characterized in that: include: A bed (1), a water tank (2), and a steam generator (3); a steam chamber (4) connected to the steam generator (3) is arranged on the upper part of the bed (1); a porous mesh plate (40) is arranged on the steam chamber (4), and at least one accommodating cavity (400) is arranged on the porous mesh plate (40); one end of the steam generator (3) is connected to the water tank (2) through a water inlet pipe (31), and the other end of the steam generator (3) is provided with at least one exhaust pipe (32) extending into the steam chamber (4); a return pipe (41) is arranged at the bottom of the steam chamber (4) and connected to the water tank (2).

2. A steam room therapy bed according to claim 1, characterized in that: The steam generator (3) is a ring-tube heater, comprising a heating tube (3A1), a surrounding water channel (3A2) wound around the periphery of the heating tube (3A1), and a shell (3A3) covered on the outside of the surrounding water channel (3A2), wherein a first water inlet joint (3A4) and a first air outlet joint (3A5) connected to the water inlet pipe (31) and the air outlet pipe (32) are respectively provided at both ends of the surrounding water channel (3A2).

3. A steam room therapy bed according to claim 2, characterized in that: The heating tube (3A1) is U-shaped, and both ends of the heating tube (3A1) extend to the outside of the outer shell (3A3) and are respectively used to connect the live wire and the neutral wire; the first water inlet joint (3A4) and the first air outlet joint (3A5) extend to the outside of the outer shell (3A3).

4. The steam room therapy bed according to claim 2, characterized in that: A water supply pump (5) is provided between the steam generator (3) and the water tank (2), and a silencer nozzle (33) located in the steam chamber (4) is provided at the end of the exhaust pipe (32).

5. The steam room therapy bed according to claim 4, characterized in that: The steam generator (3) is provided with a temperature controller (30), and the temperature controller (30) is electrically connected to the terminal of the steam generator (3); the water supply pump (5) is electrically connected to the frequency conversion regulator (6).

6. The steam room therapy bed according to claim 1, characterized in that: The steam generator (3) is a cup-type heater, comprising a cup body (3B1), a heating wire (3B2) arranged inside the cup body (3B1), a second water inlet joint (3B3) arranged at the bottom of the cup body (3B1) and used to connect to the water inlet pipe (31), and a second air outlet interface (3B4) arranged at the upper end of the cup body (3B1) and connected to the exhaust pipe (32), and the height of the heating wire (3B2) is located below the water level line in the water tank (2).

7. The steam room therapy bed according to claim 6, characterized in that: A temperature controller (30) for preventing dry burning is arranged on the outer wall of the steam generator (3); the water inlet pipe (31) is located at the bottom of the water tank (2) and the steam generator (3) and connects the water tank (2) and the steam generator (3); and a silencer nozzle (33) located in the steam chamber (4) is arranged at the end of the exhaust pipe (32).

8. A steam room therapy bed according to any one of claims 1 to 7, characterized in that: A Chinese medicine bag (7) is placed in the accommodating chamber (400), a soft bag frame (10) surrounding the periphery of the accommodating chamber (400) is arranged at the upper end of the bed (1), and a temperature sensor for detecting temperature is arranged in the steam chamber (4).

9. The steam room therapy bed according to claim 8, characterized in that: A plurality of accommodating cavities (400) are arranged above the porous mesh plate (40), a traditional Chinese medicine bag (7) is placed in each of the accommodating cavities (400), and the bottom of each of the accommodating cavities (400) corresponds to one or more holes of the porous mesh plate (40).

10. The steam room therapy bed according to claim 8, characterized in that: The water tank (2) and the steam generator (3) are both located below the steam chamber (4) and in the inner cavity of the bed body (1), wherein a first support (11) for supporting the water tank (2) and a second support (12) for supporting the steam generator (3) are provided in the inner cavity; at least four casters (13) are provided at the bottom of the bed body (1), and a through hole (100) for users to breathe is provided at one end of the soft bag rack (10); the bottom of the steam chamber (4) is inclined, and the return pipe (41) is located at the lowest area of ​​the bottom of the steam chamber (4) and above the water tank (2).

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