JPS6248767B2 - - Google Patents

Description

[Detailed Description of the Invention] Recently, sauna bathing has become widespread for the purpose of maintaining health.

In conventional sauna baths, the sauna chamber is heated by an electric heater, and the human body is heated mainly by convection of air within the sauna chamber.

In contrast, the present invention aims to save energy by converting the heat source from electricity to gas, and by irradiating far infrared rays that turn into heat when it hits the human body, it can be used at a room temperature lower than that of conventional sauna baths. The purpose of this project is to develop a gas-fired far-infrared radiation sauna heater suitable for a new sauna bathing method that provides a sensible temperature and sweating effect.

In other words, conventional heating devices promote sweating by heating the human body based on the rise in room temperature due to the convection of indoor air, which may cause people to feel a stinging or stuffy sensation on their skin more than necessary when taking a bath. of,
The energy of gas combustion is converted into far-infrared rays with a long wavelength as a heat source, and the human body is heated not only by air convection but also by direct irradiation and absorption of far-infrared rays to the human body. The first objective of the present invention is to develop a sauna heater that enables safer and more comfortable sauna bathing by allowing sweating and a higher sensible temperature than in a conventional sauna.
The second objective is to change the heat source of the sauna heater from electricity to gaseous fuel, resulting in energy and fuel savings.
Despite using the gas combustion method as mentioned above, the fourth objective is to create a structure that prevents combustion noise from leaking into the sauna room in order to make the sauna room quieter.
The purpose is to obtain a structure that can prevent air pollution and air shortage in the sauna room, and the fifth purpose is to have a structure that prevents the burner, blower, and attached control equipment from being exposed to the high temperature of the sauna room.
The sixth purpose is to have a structure that can be installed anywhere in the sauna room, and the seventh purpose is to make it easier to install the device of the present invention in the sauna room.
The eighth purpose is to obtain a gas-fired sauna heater that is easy to maintain and inspect.

The specific configuration of the present invention will be explained below with reference to the embodiments shown in the accompanying drawings.

1 to 6 show an embodiment of the present invention, which shows a far-infrared radiating device comprising a cylindrical combustion chamber 5, a smoke pipe 25, etc. parallel to a partition wall 3 between a sauna room 1 and an outside 2 of the sauna room. 4 will be provided.

The cylindrical combustion chamber 5 is bent 90 degrees from its base to provide a rectangular blower pipe 6, and the blower pipe 6 is extended to the outside of the sauna room 2 by penetrating the partition plate 7 and the partition wall 3 that partition the sauna room and the outside. A burner flange 8 is provided at the sauna outdoor pipe end of the blower pipe 6 to close it.

A pilot solenoid valve 10 and a flange 1 are connected to a gas pipe 9 for supplying gaseous fuel to a pilot burner 12.
1', the pilot fuel gas that has passed through the pilot gas conduit 11 and flowed into the blast pipe 6 from the burner flange 8 passes through the 90-degree bend and flows from the pilot burner 12 into the tubular combustion chamber 5 and is connected to the ignition transformer 13. The spark from the ignition electrode rod 14 ignites, and the pilot burner 12 starts combustion.

When the pilot burner 12 starts combustion and an ignition signal is sent from the flame rod 15 to the control relay 16, the main gas solenoid valve 17 automatically opens and fuel gas flows from the main gas pipe 18 to the flange 1.
8', the gas passes through the burner flange 8 and flows into the mixing pipe 20 from the air mixing gas nozzle 19.

Combustion air is sucked into the blower 21, secondary air flows into the blower pipe 6 from the secondary air inlet 22,
After turning 90 degrees, it flows into the combustion chamber 5.

On the other hand, primary air is supplied to the blower 21 from the primary air port 23.
Flows into the mixing tube 20 due to the suction force of the nozzle 19
It flows out from the flame port 24 through the 90-degree bend while mixing with the fuel gas flowing in, and combustion begins.

The combustion gas heats the cylindrical combustion chamber 5 and emits heat rays mainly composed of far infrared rays from the outer surface of the tube to heat the human body inside the tube. It enters the large-diameter smoke tube 25 that is bent and extended, heats the tube wall, emits far-infrared rays from the outside surface of the smoke tube 25, passes through the smoke tube 25 in a zigzag pattern as shown in FIG. 2, and penetrates the reflecting plate 26, etc. ,
It penetrates the partition plate 7 and the partition wall 3 and is sucked into the blower 21, and is discharged from the blower 21 to the outside through the chimney 27.

The two-dot chain line 28 in FIG. 3 indicates the size of the through hole in the partition wall 3, and if the hole is of this size, the rectangular blast pipe 6 and the smoke pipe 25 can easily pass through the partition wall 3.

Far-infrared radiating devices that have a burner insertion port and a blower for combustion air outside the room to be heated, such as the device of the present invention described above, are not only used in saunas, but are still little known, especially when the burner is installed at right angles. There is no known device that can be bent and extended to the outside of the chamber to be heated to insert and remove the burner.

The reason why the burner is bent at right angles, which is one of the structural features of the present invention, will be described below.

FIG. 7 is a plan view of a reference device, which is not yet known, but is constructed by constructing a far-infrared radiation device similar to the present invention without bending the burner at right angles, and FIG. 8 is a front view thereof.

In Figures 7 and 8, a far-infrared radiation device 4 consisting of a combustion chamber 5 and a smoke pipe 25 is installed parallel to one wall 3' of a corner of the sauna room partitioned by walls 3 and 3', and 3 to bring the most downstream parts of the blower pipe 6 and the smoke pipe 25 out of the sauna room, and the exhaust air in the smoke pipe 25 is sucked in by the blower 21 to remove the exhaust from the smoke pipe 25.
Exhaust from 7. On the other hand, a flange 8 is provided at the end of the sauna outdoor pipe of the blast pipe 6 to serve as a burner insertion port, and an inflow port for combustion air is provided in the flange 8.

As mentioned above, the examples shown in FIGS. 7 and 8 appear to be usable in almost the same way as the device of the present invention, but
As is clear from the figure, it can be installed only in the corners of the sauna room. In contrast, in the case of the device of the present invention, the burner is bent at right angles, so it can be installed anywhere parallel to the wall of the sauna room.

Next, the effects of the present invention will be explained in comparison with the objectives stated at the beginning.

According to the present invention, a sauna heater that not only uses air convection but also directly irradiates the human body with far infrared rays to heat the human body, thereby producing sweating and a perceived temperature higher than that of a conventional sauna even at a room temperature lower than that of a conventional sauna room. can be provided.

To do this, far infrared rays are generated from the tube surface by determining the heat load and combustion gas flow rate inside the tube so as to maintain the surface temperature of the aforementioned tubular combustion chamber and smoke tube between 200°C and 600°C.

Far-infrared rays have long wavelengths, so they are difficult to capture in the air, and have a higher rate of conversion into heat after hitting an object than other light with shorter wavelengths, and can directly heat the human body without raising the air temperature in the sauna room. It has characteristics.

Therefore, even if the temperature of the air inside the sauna is lower than that of a conventional sauna, the effect of far infrared rays, which converts into heat under the skin of the human body, directly stimulates the sweat rays and promotes sweating, and the amount of heat transferred to the human body is lower than that of a conventional sauna. The amount of far infrared rays irradiated from the room increases, and the perceived temperature rises.

In other words, even if the temperature of the sauna room is low, the same sensible temperature can be obtained due to the far-infrared irradiation effect.

Experiments have shown that even if the room temperature is about 20 to 30 degrees Celsius lower than in a conventional sauna room, the same level of perceived temperature and sweating effect can be obtained.

For this reason, we have reduced the temperature of the sauna room to the conventional 100 to 110℃.
Since the temperature can be lowered to about 70 to 80 degrees Celsius, safety is improved, and the elderly, children, and the sick can also use sauna bathing, and it can also be used to prevent overweight and provide rehabilitation for these people. The effects can be expected.

Further, by implementing the present invention, the heat source of the sauna heater is converted from electric power to gaseous fuel.

That is, almost all conventional heat sources for heating sauna rooms are electric power, and there are almost no known heat sources that use gaseous fuel. Electricity generally has a thermal efficiency of about 30%, and if the heat source of the sauna room is converted to gaseous fuel, the thermal efficiency will be 70%.
It is easy to obtain a thermal efficiency of about 1.9%, and the energy consumption can be halved, and gaseous fuels generally have lower energy costs than electricity, so it is possible to save fuel costs.

Furthermore, since the present invention has a structure that uses gaseous fuel as a heat source, in order to make the sauna room quieter, it is necessary to create a structure that prevents combustion noise from leaking into the sauna room. That is, the combustion air intake is located outside the sauna room, and the blower, which is one of the devices that generates noise, is also installed outside the sauna room, making it possible to keep the sauna room quiet.

As mentioned above, since the combustion air of the present invention device is sucked in from outside the sauna room and the combustion gas is exhausted outside the sauna room, there is no risk of air shortage in the sauna room or contamination of the air inside the sauna room by the exhaust. Furthermore, the device of the present invention uses an induced draft system, and the combustion chamber and smoke pipe are under negative pressure, so even if there is a hole in the combustion chamber or smoke pipe, there is no risk of combustion gas leaking into the sauna room, making it safe. be.

Although it is preferable that the burner, blower, and attached control equipment are not exposed to the high temperature of the sauna room, in the device of the present invention, the blower and attached control equipment are all provided outside the sauna room, and the gas burner's mixing pipe 20 and flame Port 24, flame rod 15, ignition electrode rod 14, electric wires for 14 and 15 (not shown)
The main parts of the burner are constantly air-cooled by room temperature air from outside the sauna that flows in through the secondary air inlet 22 and the primary air inlet 23, so they can be used safely.

Furthermore, the device of the present invention can be installed anywhere in the sauna room, and can make the installation of the sauna heater in the sauna room easier. In other words, it is easier to carry out construction work when there are fewer penetrating parts of the wall of the sauna room, and in the case of the device of the present invention, it is easier to carry out construction work.
Only the most downstream part of the pipe, and the temperature of the penetration part is normal temperature or the smoke pipe part where the combustion gas temperature decreases the most,
There is no need to use a heat-resistant material that is heated to such a high temperature for the wall surface material, and it is sufficient to use a wall material that is slightly heat-resistant by making smaller through holes. To install the sauna heater, simply bring the main body through the door of the sauna room and install it.
If 5 is shaped like a flange or an insert and is configured to be removable, the main body can be carried in through the door of the sauna room, and at the installation position, it can be connected to the blower and burner control equipment outside the sauna room, the air pipe 6 outside the sauna room, etc. through the through hole. On-site construction is easy.

Further, according to the device of the present invention, it is possible to obtain a gas-fired sauna heater that is easy to maintain and inspect. Generally speaking, maintenance problems such as breakdowns in various devices equipped with burners occur mostly in the burner, blower, and related control equipment, but with the device of the present invention, there is no need to go into a high-temperature sauna room for repairs. , all can be disassembled and repaired from outside the sauna room. The method for disassembling the burner is as shown in Figures 1 and 3, after removing the pilot gas pipe flange 11' and the main gas pipe flange 18', and removing the bolts, etc. of the flange 8, which is fixed with bolts, nuts, etc. If you pull it towards you while pulling it to the right in Fig. 3, you can take out the parts fixed to the burner flange 8, such as the pilot burner 15, mixing tube 20, flame port 24, etc. shown in Fig. 5, to the outside of the sauna room and use the necessary Repairs and adjustments can be easily made.

As stated above, the present invention can satisfactorily achieve all of the objectives listed at the beginning, and today, sauna bathing may become widespread for the purpose of maintaining health.
The gas-fired far-infrared radiation sauna heater of the present invention having the above features will be widely used.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a back view of the same. 4 is an enlarged sectional view taken along the line A-A' in FIG. 2, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. 6 is a view taken along arrow B in FIG. 4. FIG. 7 is a plan view of the reference device, and FIG. 8 is a front view of FIG. 7. 1... Sauna room, 3... Partition wall, 4... Far-infrared radiation device, 5... Cylindrical combustion chamber, 6... Rectangular blower pipe, 7...
Partition plate, 8... Burner flange, 9... Gas pipe for gaseous fuel supply, 10... Pilot solenoid valve, 11... Pilot gas conduit, 12... Pilot burner, 14
...Ignition electrode rod, 17...Main gas electromagnetic valve, 18...Main gas pipe, 19...Air mixing gas nozzle, 20...Mixing pipe, 21...Blower, 24...flame mouth, 25...Smoke pipe,
26... Reflector plate, 27... Chimney, 28... Size of through hole in partition wall.

Claims (1)

[Claims] 1. Far-infrared rays are generated from the outer surface of a tubular combustion chamber that burns gaseous fuel inside, and the outer surface of a large-diameter smoke pipe that extends and bends connected to the combustion chamber, and directly hits the human body in the sauna room. A tubular combustion chamber of a far-infrared radiation heating device for heating is provided parallel to the wall surface of the sauna room, and the base of the tubular combustion chamber (the most upstream part of the combustion chamber)
The tube is bent at right angles while still being tubular, and is extended to the outside of the sauna room by penetrating the wall of the sauna room.The extension tube is used as a blower tube that sends combustion air to the combustion chamber, and the sauna outdoor tube end of the blower tube is inserted into the gas burner insertion port. And the most downstream part of the smoke pipe which serves as an inlet for combustion air and distributes combustion gas similarly penetrates the wall of the sauna room to serve as an exhaust pipe,
The exhaust pipe is connected to the suction side of a blower installed outside the sauna, and the discharge side of the blower is connected to the chimney for exhaust. A pilot gas conduit that is bent in the same way and has a pilot burner at its tip that allows gaseous fuel to flow out toward the downstream of the combustion chamber, and a pilot gas conduit that is bent in the same way at the bending part of the blower tube and flows out from a gas nozzle for mixing air with a part of the combustion air. A mixing tube that mixes the mixed gas with the mixed gas fuel and flows out from the flame port at the tip toward the downstream of the combustion chamber, and an ignition electrode rod, flame rod, etc. usually installed around the pilot burner or flame port of a gas burner. A gas-fired far-infrared radiating sauna heater comprising a gas burner which is inserted into and taken out from an end of a sauna outdoor pipe of a blast pipe.