Sauna stove with element cover
The element cover in sauna stoves prevents direct water contact with heater elements, addressing rapid cooling and oxidation issues, thereby extending heater life and reducing maintenance, ensuring prolonged operation.
Patent Information
- Application Number
- JP2025002234U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2025-09-04
- Estimated Expiration
- 2035-07-07
AI Technical Summary
Conventional sauna stoves suffer from rapid deterioration of heater elements due to direct exposure to water droplets and repeated heating/cooling cycles, leading to increased maintenance needs.
An element cover is designed to prevent direct contact between water droplets and the heater element by attaching above it, with a smaller outer diameter than the container, allowing droplets to fall into the container and evaporate on heated sauna stones, reducing rapid cooling and oxidation.
The element cover extends the life of the heater element, reduces maintenance frequency, and ensures continuous operation by preventing direct water contact, thus prolonging the stove's operational life.
Smart Images

Figure 0003252684000001_ABST
Abstract
Description
[Technical Field]
[0001] This invention relates to a sauna stove with an element cover that can be used in commercial sauna rooms, home saunas, hotel saunas, fitness centers, etc. [Background technology]
[0002] Traditionally, sauna bathing has been widely used to promote health, as it transmits heat directly to the body, providing excellent benefits and effects such as promoting blood circulation, relieving stress and fatigue, and improving overall beauty. Conventional sauna stoves used for sauna bathing, as seen in Patent Document 1, for example, are configured to have a large number of sauna stones stacked on top of a heat conduction pipe installed inside the sauna stove body, and to generate high-temperature steam by pouring water from a bucket or the like onto the sauna stones heated by the heat conduction pipe. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-221265 Summary of the Invention [Problem to be solved by the invention]
[0004] Although conventional sauna stoves use heat-resistant heating elements, they are heated to high temperatures to heat a large number of sauna stones, and are also installed in a position where they are directly exposed to water droplets falling from a sprinkler system above, causing them to be rapidly cooled. In addition, excess water droplets scattered on the sauna stones come into contact with the heater element. Heater elements installed in such environments are subject to accelerated deterioration due to repeated rapid heating, cooling, and oxidation, resulting in increased maintenance for replacement. Therefore, the technical objective of this invention is to provide an element cover that prevents the spray water from directly contacting the heater element, which is heated to a high temperature, thereby reducing deterioration of the heater element. [Means for solving the problem]
[0005] (1) The sauna stove equipped with the element cover of this invention has the following features. a container 11; a heater element 12 disposed within the vessel; An element cover 12a attached to the upper part of the container; sauna stones filled in the gap between the heating element and the container; A sauna stove 10 comprising: The sauna stove 10 is provided with a sprinkler system that sprinkles water from above. The element cover 12a receives the element. Make sure that the water droplets do not come into direct contact with the heater element 12. The rapid cooling by the falling water spray prevents the deterioration of the heater element 12. (2) The outer diameter of the element cover is smaller than the inner diameter of the container, A sauna stove equipped with the element cover of claim 1, which is attached to the inside of the container. [Effects of the Invention]
[0006] According to the sauna stove equipped with the element cover of the present invention, An element cover is provided above the heater element that heats the sauna stones, which controls rapid cooling caused by sprayed water droplets and prevents deterioration of the heater element. This extends the life of the heater element and extends the interval between heater element replacements. In addition, the frequency of maintenance is reduced, enabling continuous operation for long periods of time. Furthermore, by making the outer diameter of the element cover smaller than the inner diameter of the container and attaching it to the inside of the container, water droplets that drip onto the element cover can fall into the container through the gap between the outer diameter of the element cover and the inner diameter of the container, and can be evaporated by the heated sauna stones inside the container. In this way, dripping water is evaporated without waste, and the probability of excess water coming into direct contact with the heating element is reduced, thereby extending the life of the sauna stove. [Brief explanation of the drawings]
[0007] [Figure 1] This is a front view showing an example of a state in which a heater element 12 is housed in a container 11. To make it easier to see the arrangement of the container and heater element 12, the sauna stones 14 housed in the container are omitted. [Figure 2] This is a front view showing the heater element 12 of Figure 1 stored in a container 11, sauna stones 14 filled in the gap 13 between them, and an element cover 12a attached above the heater element. [Figure 3] This is a schematic diagram showing a sauna stove 10 installed in a sauna room 20, with water droplets being sprayed from above by a sprinkler device 21, causing steam to be generated from the sauna stove 10. DETAILED DESCRIPTION OF THE INVENTION
[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sauna stove equipped with an element cover according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a front view showing an example of a state in which a heater element 12 is housed in a container 11. As shown in FIG. In order to make it easier to see the arrangement of the container and the heater element 12, the sauna stones 14 stored in the container have been omitted. Figure 2 is a front view showing an example in which the heater element 12 of Figure 1 is stored in a container 11, sauna stones 14 are filled into the gap 13 between them, and an element cover 12a is further attached above the heater element. FIG. 3 is a schematic diagram showing a sauna stove 10 installed in a sauna room 20, with water droplets being sprayed from above by a sprinkler device 21, causing steam to be generated from the sauna stove 10.
[0009] As shown in Figures 1 to 3, The sauna stove 10 equipped with the element cover of this invention is a container 11; a heater element 12 disposed within the vessel; An element cover 12a attached to the upper part of the container; sauna stones filled in the gap between the heating element and the container; A sauna stove 10 comprising: The element cover 12a receives the water falling from the sprinkler device installed above the sauna stove 10, Make sure that the water droplets do not come into direct contact with the heater element 12. The rapid cooling by the falling water spray prevents the deterioration of the heater element 12. In other words, the sauna stove 10 equipped with the element cover of the present invention is installed in the sauna room 20, and the heater element 12 housed in the container heats the sauna stones 14, evaporating the water droplets sprayed from the sprinkler device 21 above and diffusing them throughout the sauna room. In addition, an element cover 12a is attached above the heater element 12. If sauna stones 14 are also placed on the element cover 12a, the splashing of water droplets that fall onto the element cover 12a can be reduced.
[0010] <Sauna stove> The sauna stove 10 equipped with the element cover of this invention is As shown in the figure, a heater element 12 for heating sauna stones 14 packed inside a cylindrical container 11 is housed and arranged. The gap 13 between the container 11 and the heater element 12 is filled with sauna stones 14 so as to fill the gap 13. Although not shown, a power cord for supplying electricity to the heater element 12 and a holder for holding the heater element 12 are provided at the bottom of the container 11. In the figure, the heater element 12 is hidden by the sauna stones 14 that are filled in, but the heater element 12 is shown to be arranged inside the container.
[0011] <Container> The container 11 may be cylindrical in shape as long as it can accommodate the heater element 12 and sauna stones 14, but it is preferable that the outer sidewalls are formed with a fence, net, lattice, etc. This is because the evaporation of water vapor can be promoted by drawing air into the container from the outside. The material may be any heat-resistant material, such as nickel-chromium alloys such as stainless steel 304 and 316, or titanium.
[0012] <Heater element> The heater element 12 has a mechanism in which electricity of approximately 1 kW (per element) to 5 kW (per element) is passed through a conductive heating element (e.g., nichrome wire) to convert it into thermal energy, which is then heated to approximately 500 to 800°C and dissipated.To protect the heating element, it is covered with a heat-resistant metal tube. The heater element 12 is heated to a high temperature and is placed in a corrosive atmosphere in the container 11 where a large amount of water droplets are sprayed to generate water vapor. In other words, the heater element is repeatedly heated and cooled and exposed to a high-temperature water vapor atmosphere. For this reason, examples of heat-resistant metal tubes include thick tubular nickel-chromium alloys such as stainless steel 304 and 316, titanium, and the like. In the embodiment shown in the drawing, heater elements of 1.8 kW (per element) are arranged upright in an inverted U shape inside the container 11 (see FIG. 1).
[0013] <Element cover> The element cover 12a is a so-called pincushion-shaped cover attached above the heater element 12. The Jinbasho shape refers to a cone shape that is higher in the center and slopes downwards towards the periphery. By attaching an element cover 12a above the heater element 12, the falling water spray will not directly hit the heater element 12, thereby preventing the heater element 12 from being deteriorated by rapid cooling caused by the falling water spray. The element cover 12a does not necessarily have to be in a pincushion shape, as long as it covers the heater element 12 so that water droplets falling from above do not directly hit the element cover 12a. For example, it may be in the shape of a dome, a cone, a flat plate, or the like. In the embodiment, the element cover 12a is a pincushion-shaped cover having an outer diameter slightly smaller than the inner diameter of the container 11, and is inserted into the container. By attaching an element cover 12a with such a slightly smaller outer diameter, water droplets scattered on the element cover 12a fall into the container through the gap 15 with the inner diameter of the container 11, and can be evaporated by the heated sauna stones 14 inside the container. The material of the element cover 12a may be the same as that of the heat-resistant metal tube for protecting the heating element, such as nickel-chromium alloys such as stainless steel 304 and 316, or titanium. As for the shape, it is preferable to form a plate having a thickness of about 0.1 to 2 mm into a so-called "jinkasa" shape as shown in FIG. 2 and attach it above the heater element.
[0014] <Sauna stones> Sauna stones 14 include stones and ceramics. The stone used is, for example, a stone called a fragrant stone. Kokaseki is a type of igneous rock formed when magma is cooled by a glacier and hardened over a long period of time, and most of the material used is from Finland. Kokaseki is highly dense, resistant to deformation, and resistant to repeated heating and cooling. It also has the unique property of emitting far infrared rays when heated. The sauna stones 14 are about 5 to 10 cm in size and are packed in a container 11 in an amount of 100 to 400 kg.
[0015] Figure 3 is a schematic diagram showing a sauna stove 10 equipped with an embodiment of the element cover installed in a sauna room 20, water droplets being sprayed from above by a sprinkler device 21, and high-temperature steam being generated from the sauna stove 10 inside the sauna room 20. In the sauna room 20, a sauna stove 10 is installed in a small chamber 23 separated by a partition wall 22. As shown in Figure 3, when water droplets are sprayed from an upper sprinkler device 21 onto the heated sauna stones 14 filled in the gaps 13, high-temperature steam is generated from the sauna stove 10 and flows into the sauna room 20. The high-temperature steam generated by the heated sauna stones 14 fills the sauna room 20 with negative ions, creating a comfortable space. Furthermore, it can stimulate sweating and warm the human body quickly. [Explanation of symbols]
[0016] 10 Sauna stove 11 Container 12 Heater element 12a Element Cover 13 Gap 14 sauna stones 15 Gap 20 Sauna Room 21 Sprinkler system 22 Bulkhead 23 Small Room
Claims
1. A container and a heating element disposed within the vessel; an element cover attached to the upper part of the container; sauna stones filled in the gap between the heater element and the container; A sauna stove comprising: The element cover catches the water falling from a sprinkler device installed above the sauna stove, Make sure that the water droplets do not come into direct contact with the heater element. This sauna stove is equipped with an element cover that prevents deterioration of the heater element by rapid cooling through dripping water.
2. The element cover is 2. A sauna stove equipped with an element cover according to claim 1, characterized in that the outer diameter of the element cover is smaller than the inner diameter of the container and is attached to the inside of the container.
Citation Information
Patent Citations
Heater device for sauna
JP1999221265A
Cited By
Sauna stove
JP3255142U