Hot spring bath water heater

Abstract

To provide a hot spring bath water heater that keeps hot spring water at an appropriate temperature of about 42°C ± 4°C after bathing in the morning and afternoon until the water is drained at night in a private indoor hot spring bath that is not free-flowing, saves paid circulating hot spring water, saves the time and effort required to keep the hot spring at an appropriate temperature when re-bathing, and keeps the hot spring always ready for bathing. [Solution] The hot spring bath water heater has a heating element 1 connected to a power cord 10 with a plug 8 and switch 9, which can be separated into upper and lower parts by a connecting part 7, and is housed inside a heating element cover made of a material with low thermal conductivity and with many holes 6; the heating element is fixed to the bottom of the lower part 3 of the heating element cover, and the power cord passes through power cord hole 5 at the top of the heating element cover, forming a single unit. By submerging the hot spring bath water heater in the bath, the hot spring water in the bath can be kept at an appropriate temperature of around 42°C ± 4°C, saving on the cost of circulating hot water and saving the effort and time required to adjust the hot spring water to the appropriate temperature when re-bathing.

Description

[Technical Field]

[0001] This invention relates to a hot spring bath water heater that can be used in private hot spring baths that are not free-flowing and contain hot spring ingredients such as sulfur, salt, and iron, and that can save on circulating water (fees apply) and the time and effort required to adjust the temperature to an appropriate level when re-entering the bath. [Background technology]

[0002] Regarding heaters, 24-hour baths and simple bath reheaters are (i) Bath water: Do not use hot spring water, well water, etc. Bath Insulation Cleaner: Circulates hot water and can be used for about a week Immersion heaters, especially "Wakashi Taro" - There is a heater protection cover, so it is safe as it does not come into direct contact with the heater, but it says to "always remove it from the bathroom" when taking a bath. - Hot spring ingredients: sulfur, salt, iron, etc. and bath additives are not recommended for use. There are no such things that can be used in hot springs.

[0003] In a private indoor hot spring bath that is not a free-flowing bath, if you leave the water in the tub after bathing in the morning or afternoon until you drain it at night, the temperature of the tub will drop (this changes depending on the season, etc.). However, we thought it might be possible to keep the water (hot spring) at an appropriate temperature (42°C) ±4°C, thereby saving on the cost of circulating the water (for a fee) and on the time and effort required to adjust the temperature to the appropriate level when bathing again, allowing you to bathe at any time. *1 To take a bath, Basically, hot spring water at 70-75°C circulates through the main pipe, and when bathing, the circulating hot spring water is led to the bathtub through a branch pipe to adjust the temperature to the appropriate level. For this reason, the water temperature in the main pipe (70-75°C) is set to come out of the branch pipe (shower and faucet in the bathroom). For example, when taking a bath again after 3 hours, If the water in the bathtub is too hot, pour the cooled water from the branch pipe into the bathtub, and once the temperature in the branch pipe reaches about 70°C, return the bathtub to the appropriate temperature. If the water in the bathtub is cold, first run the faucet until it reaches the mains temperature (70-75°C), then put it in the bathtub to bring it to the appropriate temperature. *2 The amount of heat required is to keep the temperature at a comfortable level (approximately 42°C) after bathing, and varies depending on factors such as the heat loss caused by the difference between the water surface and the outside air (which varies greatly depending on the season) and the number of people bathing. Required wattage: Target water temperature and estimated time for water temperature rise In the case of 500W, the time required to raise the temperature of 250L by 4°C is: 250(L)×4℃ (46℃-42℃: optimum temperature) ÷ 430×1.3 = 3(h) In the case of 800W, it takes about 2 hours. C. In the case of 1000W, approximately 1.1(h) By the way, a 2.2L electric kettle uses about 1000W when boiling and about 35W when keeping water warm. *3 Thermal conductivity, etc. Aluminum: 230, Iron: 75, Water: 0.58 Water has low thermal conductivity and heats up through "convection." When hot water is heated by a heating element, it becomes lighter and the hot water rises, not spreading around. *4 Hot Springs Hot springs contain sulfur, salt, iron, and other acidic and alkaline substances, and the content varies from hot spring to hot spring, but ceramics (pottery) are highly resistant to these.

[0004] The heating element connected to the power cord with plug switch can be separated into upper and lower parts at the connecting part, and the heating element is fixed to the bottom of the lower part of the heating element cover inside the heating element cover, which is made of a material with low thermal conductivity and has many holes. The power cord passes through the power cord hole at the top of the heating element cover, and the integrated hot spring bath water heater is submerged in the bath, keeping the hot spring bath water (hot spring) at an appropriate temperature (42°C) ±4°C, thereby saving on circulating water (charged) and saving on the effort and time required to adjust the temperature to the appropriate level when re-bathing. Effects of the invention

[0005] 1. All hot spring bath water heaters are connected to electrical cords and can be used correctly. 2 The heating element is contained within a heating element cover made of a material with low thermal conductivity. In the bath: In a large amount of hot water, the hot water rises due to convection, and the surrounding area is not directly exposed to the heat of the heating element. Due to the risk of electric shock, bathing at the same time is prohibited, but even if you accidentally put your hand in, as long as there is no electrical leakage, the heating element cover will not be hot as it is made of a material with low thermal conductivity. 3 The heating element cover can be easily separated into upper and lower halves, making it easy to check the external condition of the heating element and to clean it. [Brief explanation of the drawings]

[0006] [Figure 1] Image of hot spring bath water heater in use [Figure 2] Plan view of hot spring bath water heater [Figure 3] Front view of hot spring bath water heater (right and left side views, rear view are the same) [Figure 4] Bottom view of hot spring bath water heater [Figure 5] X-Y cross section of the heating element holding part and heating element cover part [Figure 6] Perspective view of hot spring bath water heater when separated [Figure 7] Three-stage switching mechanism for heating elements (example) [Figure 8] Storage container and precautions for hot spring bath water heater (example) DETAILED DESCRIPTION OF THE INVENTION

[0007] The heating element connected to the power cord with a plug switch can be separated into upper and lower halves at the connecting part, and the heating element is fixed to the bottom of the lower part of the heating element cover inside the heating element cover, which is made of a material with low thermal conductivity and has many holes. The power cord passes through the power cord hole at the top of the heating element cover, and the integrated hot spring bath water heater is submerged in the bath, maintaining the hot spring water at the appropriate temperature (42°C) ±4°C, thereby saving on circulating water (paid for) and reducing the effort and time required to adjust the temperature to the appropriate level when re-bathing. The heating element cover is separated into upper and lower halves so that heat from the heating element is not directly transferred through convection from the many holes in the water, and also to make it easy to inspect and maintain the heating element inside. After taking a bath, hold the power cord of the hot spring bath water heater, submerge it in the bottom of the bath, turn on the switch, and keep the water in the bath warm. When it is time to take a bath, turn off the switch, hold the power cord, and take it out of the bath, and then take a bath. [Example]

[0008] An embodiment will now be described with reference to the accompanying drawings. The heating element (1) connected to a power cord (10) with a plug (8) and switch (9) is separated into upper and lower parts by a connecting part (7), and the heating element (1) is fixed to the bottom of the lower part (3) of the heating element cover inside the heating element cover part (2) made of a material with low thermal conductivity and having many holes (6). The power cord passes through a power cord hole (5) in the upper part (4) of the heating element cover, forming an integrated hot spring bath water heater.

[0009] The optimum temperature for bathing in a hot spring bath is adjusted using the circulating water (mains water temperature 70-75°C) and tap water, so there is no need to set the temperature precisely with a hot spring bath water heater. As shown in Figure 7, it is sufficient to switch between about three levels depending on the season (spring, summer, fall, winter), region, size of the bath, etc.

[0010] The heating element is completely waterproof and leakage-proof, but because "electric shock due to leakage" can be fatal, a notice (Figure 8) showing the proper position of the hot spring bath water heater and instructions on how to turn the switch on and off should be placed at the entrance to the bathroom to call attention to the situation. [Explanation of symbols]

[0011] 1 heating element 2 Heating element cover 3 Lower part of the heating element cover 4 Upper part of the heating element cover 5 Electrical cord hole 6 holes 7 Connecting part 8 plugs 9 Switch 10 Power cord 11 3-stage switch 12 Nichrome wire, etc. 13 Insulators 14 Hot spring bath water heater storage container 15 Notice 16 Bathtub 17 Water surface

Claims

[Claim 1] The heating element connected to the power cord with a plug switch can be separated into upper and lower parts at the connecting part, and the heating element is fixed to the bottom of the lower part of the heating element cover inside the heating element cover made of a material with low thermal conductivity and many holes, and the power cord passes through the power cord hole at the top of the heating element cover, making this a hot spring bath water heater characterized by its integrated construction.

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