sauna stove

The sauna stove design with a container above the heater element addresses the issue of rapid heater element deterioration by preventing direct water contact and promoting evaporation, enhancing durability and maintenance efficiency.

JP3253143UActive Publication Date: 2025-10-07EMUZU JAPAN

Patent Information

Application Number
JP2025002695U
Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-08-07
Publication Date
2025-10-07
Estimated Expiration
2035-08-07

AI Technical Summary

Technical Problem

Conventional sauna stoves suffer from rapid deterioration of heater elements due to direct exposure to water droplets, leading to frequent maintenance needs, as they are repeatedly heated and cooled.

Method used

A container is attached above the heater element to prevent direct contact with water droplets, allowing for evaporation and reducing the impact of rapid cooling, with sauna stones or sand promoting water evaporation within the container.

Benefits of technology

The solution extends the lifespan of the heater element and reduces maintenance frequency by preventing direct water contact, enabling prolonged operation and efficient steam generation.

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Abstract

To provide a sauna stove which prevents deterioration of a heater element and promotes evaporation of water droplets scattered on sauna stones. [Solution] A sauna stove (10) comprising a storage container (11), a heater element (12) installed within the storage container, a container (12a) attached to the top of the storage container, and sauna stones filled in the gap between the heater element and the storage container, in which the container (12a) receives the water that falls from a sprinkler device installed above the sauna stove (10), preventing the water from coming into direct contact with the heater element (12) and allowing the water to evaporate from the container (12a).
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Description

[Technical Field]

[0001] This invention relates to a sauna stove 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, this invention attaches a container above a heater element that is heated to a high temperature, This prevents direct contact with the spray water, preventing deterioration of the heater element. The purpose is to promote the evaporation of water droplets scattered on sauna stones. [Means for solving the problem]

[0005] The sauna stove with the container of the present invention has the following features: (1) a storage container 11; A heater element 12 installed in the container 11; A container 12a attached above the storage container 11; sauna stones 14 filled in the gap between the heater element 12 and the container 11; A sauna stove 10 comprising: The container 12a receives the water sprayed from a water spray device installed above the sauna stove 10, Make sure that the water droplets do not come into direct contact with the heater element 12. A sauna stove 10 characterized by the fact that water falling into the container is evaporated. (2) A container 12a is attached to the top of the storage container 11 and is located at the bottom of the container 12a. 2. A sauna stove according to claim 1, characterized in that it is covered with sand. [Effects of the Invention]

[0006] The sauna stove of this invention has a container attached above the heater element that heats the sauna stones, which prevents water from splashing directly onto the heater element 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 placing a layer of sand about 2 cm thick at the bottom of the container and placing sauna stones on top of that, you can help the falling water that accumulates in the container evaporate. In other words, the heat accumulated in the heated sauna stones or sand inside the container can promote evaporation. In this way, the falling water is evaporated without waste and does not splash directly onto the heating element, thereby extending the life of the heater element and 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 stored in a storage container 11. Note that the sauna stones 14 stored in the storage container are omitted so that the arrangement of the storage container 11 and the heater element 12 can be easily seen. [Figure 2] This is a front view showing the heater element 12 shown in Figure 1 stored in the storage container 11, sauna stones 14 filled in the gap 13 between them, and then a container 12a attached above the heater element 12. [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 The sauna stove according to the present invention will be described in detail below with reference to the accompanying drawings. 1 is a front view showing an example of a state in which a heater element 12 is stored in a storage container 11. Note that the sauna stones 14 stored in the storage container 11 are omitted so that the arrangement of the storage container 11 and the heater element 12 can be easily seen. Figure 2 is a front view showing an example in which the heater element 12 shown in Figure 1 is stored in a storage container 11, the gap 13 between them is filled with sauna stones 14, and then a container 12a is 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 of the present invention includes a storage container 11, a heater element 12 installed in the storage container 11, a container 12a attached above the storage container 11, sauna stones 14 filled in the gap between the heater element 12 and the storage container 11, and A sauna stove 10 comprising: The falling water sprinkled from a sprinkler device installed above the sauna stove 10 is received in a container 12a, and the falling water is prevented from directly splashing onto the heater element 12, and the falling water in the container is allowed to evaporate. This prevents the heater element 12 from being deteriorated due to rapid cooling caused by the falling water. The sauna stove 10 of this invention is installed in a sauna room 20, and heats sauna stones 14 using a heater element 12 housed in a container 11. The water droplets sprayed from the sprinkler device 21 above are evaporated and diffused throughout the sauna room. In addition, a container 12a is attached above the heater element 12, and if sauna stones 14 or sand are placed on top of this container 12a, the evaporation of water droplets accumulated in the container 12a can be promoted.

[0010] <Sauna stove> The sauna stove 10 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 stored and arranged. A 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 storage container 11. In the figure, the heater element 12 is hidden by the sauna stones 14 that have been filled in, but the figure shows the heater element 12 arranged inside the container.

[0011] <Storage container> The storage container 11 may be any cylindrical shape that can store the heater element 12 and sauna stones 14, and it is preferable that the periphery of the storage container 11 is formed with a fence, net, lattice, or the like. This is because air can be taken in from outside the container, promoting water evaporation. The material may be any material that is heat resistant. For example, nickel-chromium alloys such as stainless steel 304 and 316, titanium, etc. can be mentioned.

[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. That is, 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 this embodiment, heater elements of 1.8 kW (per element) are erected in an inverted U-shape inside the container 11 (see FIG. 1).

[0013] <Container> The container 12a is a so-called basin-shaped concave container attached above the heater element 12. The shape of the container is not limited to a washbasin, but can be any pot, frying pan, vessel, or other container with a large opening at the top, and the depth and shape, such as circular or rectangular, are not important. The bottom of the container 12a is preferably flat or round, and may be any shape that can collect and hold liquid. By attaching the container 12a above the heater element 12, the falling water spray will not directly hit the heater element 12, and deterioration of the heater element 12 due to rapid cooling caused by the falling water spray can be prevented. The container 12a not only serves to prevent water droplets falling from above from directly hitting the container, but also serves to evaporate water droplets that have accumulated in the container. By attaching such a container 12a, water droplets sprayed from above are temporarily stored in the container and evaporated by the heat of the container heated by the heater element 12. Furthermore, the falling water sprayed from above also enters the container 11 and can be evaporated by the heated sauna stones 14 inside the container 11. The container 12a may be made of iron, but it is also preferable to use the same material as the heat-resistant metal tube for protecting the heating element, such as nickel-chromium alloys such as stainless steel 304 or 316, or titanium.

[0014] <Sauna stones> Sauna stones 14 include stones and ceramics. The stone used is, for example, a stone called a fragrant stone. Fragrant stone 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 stones used are from Finland. Kohka stone has a high density, is difficult to deform, can withstand repeated heating and cooling, and emits 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 a container of the embodiment 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 Storage container 12 Heater element 12a container 13 Gap 14 sauna stones 15 Gap 20 Sauna Room 21 Sprinkler system 22 Bulkhead 23 Small Room

Claims

1. A storage container and a heater element disposed within the container; a container attached above the storage container; sauna stones filled in the gap between the heater element and the container; A sauna stove comprising: The container receives water sprayed from a water spray device installed above the sauna stove, Make sure that the water droplets do not come into direct contact with the heater element. A sauna stove characterized by the evaporation of water falling from a container.

2. A container is attached to the top of the container and is at the bottom of the container.

2. A sauna stove according to claim 1, characterized in that it is covered with sand.

Citation Information

Patent Citations

  • Heater device for sauna

    JP1999221265A

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