Dome-shaped electric sauna bath

Abstract

To provide a dome-shaped electric type sauna bath having extremely high thermal efficiency and capable of greatly promoting perspiration from a human body, where hot-air temperatures in an intra-dome upper layer part, intra-dome middle layer part, and intra-dome lower layer part are equalized and thermal energy radiated from the human body is also stirred by stirring intra-dome air (hot-air) heated especially by far-infrared radiation thermal energy and conductive thermal energy using turbulence caused by diffusers in the dome.SOLUTION: A dome-shaped electric type sauna bath comprises a plurality of semi-cylindrical heat-generating elements 4 on inner surfaces of a semi-cylindrical upper dome 2 and lower dome 3, the dome-shaped electric type sauna bath having a plurality of plate-like ascending air current diffusers 7 installed in the longitudinal extension direction on the inner surfaces of the semi-cylindrical upper dome 2 and lower dome 3 along the whole length in the dome longitudinal direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] This invention relates to a dome-shaped electric sauna bath that utilizes far-infrared rays, and in particular to a dome-shaped electric sauna bath that uses a diffusion plate inside the dome to create turbulence and stir the air (hot air) inside the dome that has been warmed by far-infrared radiant heat energy and conductive heat energy, thereby equalizing the temperature of the hot air in the upper, middle and lower parts of the dome and similarly stirring the heat energy radiated from the body, resulting in extremely good thermal efficiency and greatly promoting sweating from the body. [Background technology]

[0002] A dome-shaped electric sauna bath 1 that utilizes far-infrared rays has been known for some time. The conventionally known dome-shaped electric sauna bath 1 will be explained with reference to Figs. 1 and 2. Such a dome-shaped electric sauna bath 1 is composed of two semi-cylindrical upper and lower domes 2 and 3, with the upper dome 2 housing the upper half of the body and the lower dome 3 housing the lower half of the body. A plurality of semicircular arc-shaped heating elements 4 such as cord heaters, ceramic heaters, epoxy laminate heaters, graft carbon heaters or the like are provided at appropriate intervals on the inner surface of each of the domes 2, 3.

[0003] As shown in FIG. 1, the user places almost the entire body 10 except for the head within both domes 2 and 3, and lies on the mat 5 in a supine or prone position. Sweating is induced by the irradiation of far-infrared rays from the heating element 4 and the increase in the air temperature inside the dome due to conductive thermal energy.

[0004] In such known dome-shaped heaters, the far-infrared radiation heat generated by the heating element is irradiated to the body and also heats the air inside the dome by conduction heat. This heated air (hot air) becomes an ascending air current, and most of the hot air stays in the upper part of the semi-cylindrical upper dome 2 and lower dome 3, resulting in a temperature difference of about 20°C to 30°C between the hot air temperature in the upper part of both domes and the hot air temperature in the lower to middle parts where the body is located, which is a factor in the inefficiency of sweating. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2007-275507 A [Patent Document 2] JP 2009-291621 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] In the above-mentioned conventional dome-shaped electric sauna bath 1 that utilizes far-infrared rays, the multiple heating elements 4 extending in a semicircular shape and installed along the semicircular inner surfaces of the upper dome 2 and the lower dome 3 generate heat when electricity is applied, and as a result, an ascending air current flows upward along the heating elements 4 within both domes, and over time the hot air accumulates in the upper parts of both domes. This resulted in the disadvantage that the atmospheric temperature in the upper parts of both domes became unevenly hotter than in the lower and middle parts.

[0007] This invention solves the above problems by installing 4 to 10 plate-shaped upward air current diffusion plates (diffusion fins) 7 at appropriate intervals on the inner surfaces of the semi-cylindrical upper dome 2 and lower dome 3 along the entire length of the semi-cylindrical upper dome 2 and lower dome 3 in the longitudinal direction, and diffusing part of the air current heading toward the upper layer in the lateral direction (horizontal to the bed), which stirs the hot air and equalizes the temperature inside the upper, middle, and lower domes through turbulent convection. At the same time, this invention provides a dome-shaped electric sauna bath that stirs the thermal energy radiated from the body, has extremely good thermal efficiency, and can further promote sweating from the body. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the invention described in claim 1 is a dome-shaped electric sauna bath having multiple semi-cylindrical heating elements 4 on the inner surface of a semi-cylindrical upper dome 2 and lower dome 3, characterized in that multiple plate-shaped updraft diffusers 7 are installed along the entire length of the dome's inner surface in the longitudinal extension direction of the semi-cylindrical upper dome 2 and lower dome 3.

[0009] Claim 2 provides the dome-shaped electric sauna bath according to claim 1, characterized in that six to eight of the upward air current diffusing plates 7 are installed at appropriate intervals. Effect of the Invention

[0010] The dome-shaped electric sauna bath 1 according to claim 1 is equipped with an updraft diffusion plate (diffusion fin), so that the hot air from the semi-cylindrical upper dome 2 and lower dome 3 does not proceed straight to the upper part, but is diffused horizontally at the position of the updraft diffusion plate 7, or is diffused in the reverse direction toward the lower part. As a result, the hot air inside the dome is not concentrated throughout the upper floors, but is leveled out, providing the excellent effect of making sweating more efficient.

[0011] Furthermore, the dome-shaped electric sauna bath 1 according to claim 2 has 6 to 8 ascending air current diffusion plates 7 arranged at appropriate intervals, so that it is possible to achieve the effect of achieving even more effective sweating. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a dome-shaped electric sauna bath 1. [Diagram 2] 1 is a perspective view showing the overlapping state of the semi-cylindrical upper dome 2 and lower dome 3 in an extended state. [Diagram 3] 1A is a perspective view of a heating element, and FIG. 1B is a perspective view of a state in which a plurality of upward air current diffusion plates 7 are arranged. [Figure 4] FIG. 1A is an explanatory diagram showing the flow of hot air in a state where an updraft diffuser plate 7 is not present, and FIG. 1B is an explanatory diagram showing the flow of hot air in a state where an updraft diffuser plate 7 is present. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dome-shaped electric sauna bath according to the present invention will be described in detail below with reference to the accompanying drawings. First, as shown in Figure 1, the dome-shaped electric sauna bath 1 of the present invention has a semi-cylindrical upper dome 2 and a semi-cylindrical lower dome 3 stacked on top of each other so that they can slide freely. For lower body baths or hip baths, it is used in the state shown in Figure 1, and for full body baths, it is used in the state shown in Figure 2.

[0014] In the figure, reference numeral 5 denotes a mat, 6 denotes a bed, 8 denotes a controller for operating the heating element 4 etc., 9 denotes a shielding cover, and 11 denotes a support column of the dome structure to which the updraft diffuser plate is attached.

[0015] A number of semicircular arc-shaped heating elements 4, consisting of cord heaters, ceramic heaters, epoxy laminate heaters, graft carbon heaters or the like, are provided at appropriate intervals on the inner surfaces of the semi-cylindrical upper dome 2 and the semi-cylindrical lower dome 3. The air inside the dome-shaped electric sauna bath 1 is heated by the energy emitted from these heating elements, and the hot air hits the body 10.

[0016] In the dome-shaped electric sauna bath 1 of the present invention, multiple plate-shaped updraft diffusers 7 are installed along the entire length of the inner surfaces of the semi-cylindrical upper dome 2 and lower dome 3 in the longitudinal extension direction, so that the hot air inside the sauna bath comes into contact with these updraft diffusers 7, preventing the updraft from rising straight up. Here, the updraft diffusion plate 7 is formed of a plate having an appropriate thickness and height, and functions as a diffusion plate called a diffusion fin.

[0017] It is sufficient to provide an appropriate number of these upward air current diffusion plates 7 in accordance with the size of the dome body of the upper dome and the lower dome. As an example, it is preferable to provide about 6 to 10 plates to ensure the diffusion effect. The number of updraft diffusion plates 7 is determined according to the size of the dome body.

[0018] By attaching this updraft diffuser 7 to the inner wall surface of the dome using the support columns 11 that form the skeleton of the dome, as shown in Figure 4(b), the hot air comes into contact with the updraft diffuser 7 and diffuses horizontally or in the opposite direction inside the dome-shaped electric sauna bath 1, preventing the hot air from stagnating in the upper parts and ensuring that the hot air is distributed evenly in the lower and middle parts, promoting sweating with good thermal efficiency.

[0019] Needless to say, the updraft diffusion fin can be used not only in dome-shaped sauna baths, but also in so-called box-shaped electric sauna baths equipped with cord heaters, ceramic heaters, epoxy laminate heaters, graft carbon heaters, etc. that emit far-infrared radiation.

[0020] The dome-shaped electric sauna bath 1 of the present invention can promote sweating with good thermal efficiency with a simple structure without adopting a complex configuration, and also ensures safety during use. [Industrial Applicability]

[0021] The present invention finds application in industries that use and manufacture electric dome-type sauna baths. [Explanation of symbols]

[0022] 1. Dome-shaped electric sauna bath 2...Semi-cylindrical upper dome 3...Semi-cylindrical lower dome 4…Heater 5. Matt 6. Bed 7...Updraft diffusion plate 8. Controller 9…Shielding cover 10…Body 11...Support column of the dome structure to which the updraft diffuser plate is attached

Claims

1. This dome-shaped electric sauna bath is provided with a plurality of semi-cylindrical heating elements 4 on the inner surfaces of the semi-cylindrical upper dome 2 and lower dome 3, and is characterized in that a plurality of plate-shaped upward air current diffusion plates 7 are installed along the entire length of the dome in the longitudinal direction on the inner surfaces of the semi-cylindrical upper dome 2 and lower dome 3 in the longitudinal extension direction.

2. 2. The dome-shaped electric sauna bath according to claim 1, wherein 6 to 8 of the upward air current diffusion plates 7 are installed at appropriate intervals.

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