FI121806B - Method of heating a sauna oven and a sauna oven according to the method - Google Patents

Description

Heating method and heater according to the method

The invention relates to a method for heating a heater according to the preamble of claim 1 and to a heater according to the method.

5 The currently known methods of heating sauna heaters are based on the use of wood or electricity as a source of heat and on the method of transferring the heat produced by this method by contacting it with steam stones through contact surfaces. The efficiency of said conductive heat transfer method is poor and consequently the heater has a long warm-up time, usually about an hour. In addition, the stoves based on the above-mentioned method are heavy in construction and therefore not suitable for, for example, camping or tourism.

However, many enthusiastic saunas have equipped their boat or motorhome with the possibility of bathing. In these cases, the stoves operate almost invariably on wood, which means that the wood needed for heating needs to be carried, which takes up space and is cumbersome.

From an ecological point of view, a wood-burning stove produces a large amount of fine particulate and hydrocarbon emissions, while the use of electricity is burdened by large losses in production and transmission.

With this basic philosophy, sauna heaters have been built for dozens of years and no significant development has taken place, with the exception of the inventions disclosed, for example, in patents FI108213B and FI115114B.

In some cases, the stove requires portability. The energy source typically used by Karaaroans and boaters in boilers and grills is propane. Thus, a gas fired heater heating method would be the most natural solution for the aforementioned uses, but a workable gas heater heating method has not been successfully solved. Indeed, the mouth-5's stumbling block has become a characteristic of gas

(M

^ burning it with a free flame. The gas flame is almost completely free of carbon particles which, when glowed, would produce flame rays essential to the formation of infrared heat. Therefore, the most common method utilizes the thermal energy of gas combustion, which is based on convection, that is, heat transfer o, when a hot, rare substance rises up in the gravitational field.

C/O

g Because of the above, the known methods of heating a wood or electric stove o are not suitable as a basis for designing a method of heating a gas stove.

2

The gas stove has long had significant potential for excursion use, as well as in areas where natural gas has been widely available. In addition, stricter emissions regulations for the future will reduce the availability of traditional wood burning stoves, especially in densely populated countries. Thus, gas would provide a good opportunity to use a clean heating method for this application, especially when the product of combustion of the gas is heat, water and carbon dioxide.

The above drawbacks can be overcome and the above objectives are achieved by the heater heating method according to the invention and the heater according to the method, which is characterized by what is defined in the characterizing parts of the claims.

One of the most important features of the invention is the high efficiency of the heater. The heater heats up in a few minutes, which substantially reduces the need for energy. First, this basic 15 comes from the gas heater's infrared heat radiation and its large surface area, as well as the rapidly reached 1000 degrees Celsius. Secondly, the large surface area of the receiving elements (evaporator surface / steam stones) and their high infrared heat absorbing capacity and third, the unobstructed infrared heat radiation and the distance between the infrared heat radiator and the receiving members.

The heater according to the invention can be manufactured from known components and raw materials which have been in use for a long time in a very cost-effective manner and, if necessary, light in comparison with conventional heaters. It is clear, therefore, that the above-mentioned considerations will result in overall economic benefits 25 in addition to the clear existing demand for the heater.

An essential advantage of the invention can also be considered the ecological importance of the stove compared to other similar methods. Natural gas ecological

(M

The efficiency is 65-70%, while the corresponding electricity is 45-50% and oil 55-60%.

σ> 30 It can also be mentioned that the new heating method of the stove and | The method heater opens up a whole new market for new types of sauna solutions, where portability, ease of handling and rapid warming are key. The invention creates new business activities and does not compete with existing players on the market.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described in detail with reference to the accompanying drawings in which: FIG. in the heating and bath phase, Fig. 4 shows an embodiment of the invention obliquely from the rear.

10 The figures below show the following parts of the heater. The receiving means 2a, 2b and the radiator 3a, and the gas energy infrared thermal radiation travel 3c therebetween. A body 6a provided with an actuating member 10a, 10b, lifting means 16, and openings 7a, 7c, respectively, provided with passages 5a, 5b and a shut-off flap 8. The find body 4a with an opening 7b and its edges 18, and a recess 12 and an oblique upper surface 6b. Inside the body 6a there is further provided an oxygen sensor 14 and a flame arrester 15.

In the invented heater, one or more of the receiving members 2a, 2b are heated by the gas energy infrared heat radiation 3b. The receiving member 2a has at least one radiator 3a disposed substantially at a gas energy infrared heat radiating distance 3c from the receiving member 2a, 2b.

Gas energy infrared heat radiation 3b is a prior art technique most commonly used in small local heaters and, for example, in various processes in the paper industry due to its efficiency, ease of adjustment and its pollution-free nature. The burner technology of the known gas energy infra-red red heat radiators is most commonly based on the utilization of a 3D ceramic mesh or catalytic wool for use in a gas flameless combustion process. 5 This known technique is also used in the gas energy

(M

for producing infrared heat radiation 3b and for heating the receiving means 2a, 2b.

σ> 30 Figure 1 shows a structural solution | according to the invention a schematic view in which the radiator 3a converts the energy contained in the gas into gas energy infrared heat radiation 3b. The radiator 3a is arranged to radiate

C/O

g unobstructed gas energy infrared heat radiation distance 3c from receiving element 2a to heat it as efficiently as possible. The thickness of the receiving member 2a can influence the heating properties of the heater and the purpose of the heater. The figures show the convection flow 9b caused by the combustion of gases, arranged so that the body part 6a is arranged obliquely on its upper surface 6b, where the body part 6a has one or more openings 7a, 7c provided with a channel 5a, 5b 8 for closing channels 5a, 5b. Convection flow 9b can thus be utilized first to heat the receiving members 2b by directing convection flow 9b through the lower part 4b of the steam chamber 4a to the duct 5a and from there to the outdoor air 11b, and secondly through the duct 5b for inlet air 11b.

Fig. 2 is a schematic view of a structural solution according to the invention in which the radiator 3a directly heats the receiving members 2b. 10 In this solution, the hot radiation surfaces of the radiator 3a must be protected by some method to prevent the adverse effects of the steam water spray. For example, glass surfaces that are highly resistant to heat fluctuations are suitable for this protection. An opening 7b for discharging the steam water is formed in the body part 6a at the steam chamber 4a. An opening 4b is provided with a lid 4c to accelerate heating. The edges 18 of the Au-15 con 7b are shaped to extend substantially below the upper edge of the radiator 3a so that the exhaust gases 9a do not escape from the opening 7b to the sauna space 11a with the lid 4c open.

Fig. 3 is a schematic view of an embodiment of the invention, wherein the receiving member 2a is provided with at least one radiator 3a arranged to radiate unobstructed substantially gas-infrared heat radiation 3c from the receiving member 2a so as to heat as effectively as possible.

In the figure, the convection flow 9b is arranged such that the receiving member 2a is inclined with its upper surface 6b and the receiving member 2a has one or more openings 7a provided with a channel 5a through which the exhaust gases 9a file into the outdoor air 11b. The radiator 3a takes the air 5 required for the combustion of gas from the bath space 11a below the edge of the receiving member 2a. The said

CV

A sauna heater model could most advantageously be used in saunas where it is easy to provide sufficient ventilation, such as in tent saunas.

CD

Receptor 2a is provided with a recess 12 and receptacle 2b therein, as well as a receptacle 13 with a lid for any perfume, for example, for chips. In the figure, the arrow flow of the steam stream 1 is shown. The flame arrester 15 is provided inside the receptacle 2a.

Fig. 4 shows a constructional solution of the invented heater, wherein the body portion 6a has at least one radiator 3a arranged to radiate substantially unobstructed gas-infrared heat radiation distance 3c from the receiving member 2a so as to heat as efficiently as possible.

On the outside of the body part 6a there is provided a gas flow actuator 10a and a spark ignition actuator 10b for activating and stopping the stove and regulating the power of the stove. A lifting means 16 is provided on the outside of the body 6a and an oxygen sensor 14 is disposed on the inside of the body 6a, which interrupts the gas supply if the amount of oxygen in the sauna room 11a falls unnecessarily.

The body portion 6a, the lid 4c, the ducts 5a, 5b and the flap 8 are most preferably made of stainless steel or other metal and are shaped as plate, cylindrical or casing solutions. Preferably, the receiving member 2a is a heat-resistant rock-based or ceramic raw material, such as soapstone or heat-resistant casting material, and is shaped as a planar, cylindrical, enclosure or dish. Other forms are possible. The receiving members 2b are most preferably typical prior art steam stones.

15 All parts of the invented heater can be made from known raw materials and by known manufacturing methods and machines. Other well-known fuels which are liquid at normal atmospheric pressure, such as light petroleum, can be used as fuel, whereby gasification is effected by prior art techniques utilizing heat and pressure.

The method of the present invention mainly describes, through a few structural alternatives, the construction of the heater according to the method. It will be apparent to one skilled in the art that the invention is not limited to the above alternatives, but that many modifications are possible within the scope of the inventive idea defined in the appended claims.

δ

(M

i δ i O)

X

I do not

CL

o

C/O

C/O

o h- · o o

(M

Claims (10)

A heater for use in generating heat for bathing, comprising one or more heater receiving means (2a, 2b) and a gas-powered heat source, characterized in that the heater is adapted to produce infrared heat radiation, wherein one or more ) are arranged in the vicinity of a heat source for heating the receiving means by infrared heat radiation produced from gas energy. Stove according to Claim 1, characterized in that the receiving element (2a) has at least one radiator (3a) arranged substantially at a distance from the receiving element (2a, 2b) of the gas energy infrared heat radiation path (3c). A heater according to claim 1, having a body (6a), characterized in that the body (6a) has at least one radiator (3a) arranged substantially at a distance from the receiving means (2a, 2b) of the gas energy infrared heat radiation (3c). Stove according to Claim 3, characterized in that the body (6a) and / or the receiving member (2a) have one or more openings (7a, 20c) and a channel (5a, 5b) is arranged in said opening (7a, 7c). ) for controlling convection currents (9b). Stove according to Claim 4, characterized in that a shut-off flap (8) is provided in the channel (5a, 5b) of the body (6a). Stove according to Claim 3, characterized in that the run-25 body part (6a) has an opening (7b) with a lid (4c) at the steam chamber (4a). A heater according to claim 6, characterized in that the edges (18) of the aperture CM ± (7b) are shaped to extend substantially below the upper edge of the radiator (3a) on the side of the steam chamber (4a). Stove according to Claims 2, 3 and 4, characterized in that the body (6a) and / or the receiving member (2a) are arranged obliquely on their upper surface (6b). A heater according to claim 1, characterized in that a gas flow actuator (10a) and a spark ignition actuator (10b) are arranged on the outside of the bulk (6a) or receiving member (2a), and on the inside. an oxygen sensor (14) and a flame arrestor (15). A method for heating a stove, the heater comprising one or more receiving means (2a, 2b), characterized in that the method comprises the steps of producing infrared heat radiation with gas energy, and heating the gas energy with infrared heat to one or more receiving means (2a, 2b). o (M δ i O) X en CL O CO CO o h- · o o {M