WO2011009995A1

WO2011009995A1 - Heat storing fireplace

Info

Publication number: WO2011009995A1
Application number: PCT/FI2010/000049
Authority: WO
Inventors: Mika Tapio Reijonen
Original assignee: Mika Tapio Reijonen
Priority date: 2009-07-22
Filing date: 2010-07-21
Publication date: 2011-01-27
Also published as: EP2457026A1; EP2457026A4; FI20090284A0

Abstract

The invention concerns a product that is used in a fireplace. The product has a conductive non-melting outer shell (1) and inside the shell (1) at least one substance (2) or more substances (3) of which at least one is a heat storing substance. The product quickly reserves thermal energy from the fireplace.

Description

HEAT STORING FIREPLACE TECHNICAL FIELD An invention is a heating storing fireplace. The invention belongs to material and energy areas.

BACKGROUND OF THE INVENTION Today, a lot of expensive heat energy are lost, when the heat of wood or pellet transports through chimneys to outside. For example,

http://www.nuohoojat.fi/walo l/esivu.php?id=89 retrieved 21 Aug 2009 "Red glowing embers to release a lot of heat, 25-40 percent of the energy content of wood". So the problem is often that this energy is lost from the fireplace, for example there will take place a a strong air pulling. In many cases, also a firebox of the fireplace is unnecessarily too big.

The problem is that a flue damper cannot be closed. On the other hand, environmental aspects are also important, and, and using a lot of wood also the carbon dioxide emission increases. Also the current problem is that massive, heat storing fireplaces are too slow to warm up.

Currently heat storing fireplaces energy transfers from a firebox using the indirect heat transfer with as medium material are used air. In addition much used in boilers, which are for example on the side of the stove.

Three heat transfer phenomena are well known: conduction, convection and radiation Conduction is heat transfer in the inside of material. Heat conduction may also happen from material to another, if materials are in contact with each other. During this process the heat is transferred directly between two or more of the substance through contact with the surface. This is advantageously used in this invention, the unmolten outer shell (1) is in contact with fire and coal, and the outer wall of the inner part (2 and 3). Convection is heat transfer of gas or liquid caused by movements of the heat. In this invention this is also advantageously used when the product is within the molten metal (2).

The heat of melting is the energy required to change a solid into a liquid phase.

Conversely, heat of freezing, solidification, tells how much energy is released when a substance freezes. In this invention it is advantageously used when the product inside the metal (2) of the melts and freezes.

It is usually a good thing that material has a high thermal conductivity, but it also usually means that it also cools down quickly. On the other hand, the heating of a large mass of stones in fireplaces is slow. The solution has been tried very long time, but now presented solution is not before presented. In the following publication it describes e.g. heat conducting. Eloranta E.: Geophysical field theory publication STUK-Al 98. Helsinki 2007, 423 p. www.stuk.fi/julkaisut/stuk-a/stuk-al98.pdf on the page 331 retrieved 15 June 2009 Table 9.2: geological heat conducting materials. The publication presents well, for example the rock porosity and pore fluids have an effect on thermal conductivity values.

SUMMARY OF THE INVENTION Crucially of the invention, such as according to the patent claim 1 that a heat storing fireplace reserves quickly and plenty of thermal energy. Product design is the importance of heat storing, as well as appearance and of course marketing. For example, the product may be diamond shaped. It may be, for example, holes, so that coal combustion is not hindered too much. It is also advantageous that the embers burning needs less oxygen than strong fire.

It is very surprising, and inventivee that during many years and also very strong patenting periods, it is not now described the invention to be invented. For example, the patent application FI 884 357 Kivimaa A. and Perala R. An electric stove, from the year of 1988 was presented heat storing stones space, placements of resistances and air flow, and already in 1935 was presented the patent application FI 16 683 Rasanen I. "Heating equipment for sauna or other room, and its patent claim is a "Heating device for sauna or other room is known that its inside there is one or more ovens, which are so constructed that the through flow of heated air, and that the heating device cover are formed upward bulges and plats equipped with cast iron palte, which in subsides there could also can be plats and bulges". The solution, which were found, was closest to the patent application FI 915223 Harvia P. An electric stove, in which uses molten aluminum fot binding and releasin energy by the phase transition energy , but it is very different now presented solution.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The invention for use as fireplaces, furnaces, ovens, stoves, baking ovens, round ovens, cookers, heaters and other fireplaces, such as grills and campfires. For example, grill and campfϊre will be better heat storing, so that it can be used, for example by cooking with the continuation. The problem could be the lack of heat at the end of the cooking and/or uneven heat.. In a tent there is often a problem cooling of the stove, and the product can be used there as well. A removable model can be used for other space heating or cooking can be used in other rooms. As a source of fuel there are a variety of different fuels in addition of firewood such wood chips, sod peat, coals, pellets, briquettes, and oil and gas products.

Advantages of the invention are fast and efficient heat storing. Less wood consumption means economic benefits and leads to reduced emissions. Wood is expensive, and results of burning of wood, atmospheric carbon dioxide increases.

The product is suitable for existing stoves, ovens and stoves to separate, or may be pre- installed optimizing the fit to the new stoves, ovens and stoves in the product may stand on its own feet, which can be flexible, resulting in the contact of combustible materials, such as carbon. The product can be designed so that the firebox is made to a suitable location, which may be lift like solution, using the force of gravity. The product can be installed on the fireplace element, for example on the bottom of the fireplace or be separate. It is clear that the product's exterior and inside the material must last the temperature generated there. Examples Example 1 Exterior product (1) is made of stainless steel, inside (2) 99.3% tin and 0.7% copper alloy, and (3) olivine stones. The product inside has extension space. The product is placed on top of the fireplace embers and it gets hot, and inside the tin-copper melt and heat up the stones. Diminishing embers releases its heat energy to indoors. Also the flue damper can be closed.

For those skilled in the art, it is clear that the invention is not limited to the above modes of supply of the details, but for example, sand stones, size of a large-sized rocks, or their mixture, different materials and models and design solutions, such as a ball and cone, they are clear and do not involve novelty or inventive step, and they are included in this patent covered, such as the arts on product models, such as lines, contours, colours, shape, texture, material, etc. characteristics of the overall impression. For those skilled in the art, it is clear that the invention is limited for using stones (3), but it may be, for example, asphalt. BRIEF DESCRIPTION OF THE FIGURES

FIG 1. A schematic figure of the stove. Of course, the stove has for example stones and a chimney, but in the figure it is presented in new and inventive part of the stove. In this figure, the product of an unmolten metal shell (1), internal parts (molten metal 2 and/or heat reserving material 3), is a separate and detachable heat storing device. A firebox (5), a body of the stove (6) and an ash box (4), which is not necessary.

FIG 2. One location of the element in the fireplace. A closed chamber (7), an outer shell, unmolten metal, e.g. steel (8), melting metal, e.g. tin or metal alloy, e.g. tin copper (9), stones or ceramic material (10), air (11), and fire (11).

According changing rules and a new PCT rule 1 July 2010 46.5, 66.8, 70.2 (c-bis) there is presented paragraphs where the changes are in this priority application FI20090284.

In the intermediate decision of this priority application FI 20090284 by National Board of Patents and Registration of Finland, it was presented one reference publication The patent publication FI 20065768 A Tulisija, applicant: Tulikivi Oyj. In this patent publication is used phase change materials in paraffin or salt, and also refers to part of the explanation of the erythritol. Also the main thing is that principle is based on phase changing, not mainly also to transfer heat to other heat storage materials, e.g. stoves. Also this invention is not possible using in near fireplace.

Phase change material also describes the use of a description part of the patent application 20090284, such "FI 915 223 Harvia P. Electric stove, which uses

melting of aluminium and using also phase changing heat energy in the main function, and it is very different compared to now presented solution.

There is the figure 2 which is one possible location of the element near or close fire.

In the patent application claims 1, 5, 8 and 9 shows the element is near or contact fire, which is very different comparing to for example FI 20065768 A Tulisija, applicant: Tulikivi Oyj.

In the patent declaration on the page 1 the rows 31-32 and on the page 2 the rows 3-4 are presented metal (2) inside products, in which the metal (2) is melting. So it can be metal metal alloy, such in the claim. Those skilled in a art it is clear that melting can be a metal, such tin or aluminium or a metal alloy, such tin copper or aluminium zinc.

Claims

1. A product, which is for using heat storage in a fireplace, reserves quickly and plenty of thermal energy by using highly conductive, in a fireplace an unmolten outer shell (1) and within the same (2) or more different substances (3), of which at least one is a heat storage substance.

2. The product according to the claim 1 the outer shell (1) is typically a metal such as steel, iron, copper, chrome, bronze, brass or aluminum, or their mixture.

3. The product according to the claim 1 the substance (2) is typically in a fireplace melting metal such as tin, or tin and copper alloy.

4. The product according to the claim 1 the substance (3) is typically stones, for example olivine stones, olivine diabase stones, peridotite stone and/or soapstone or ceramic products, such fire bricks, or their mixtures.

5. The product according to the claim 1 the product is near or in contact with the embers and / or fire.

6. The product according to the claim 1 the product is a sheet shaped, a cube shaped, a cone shaped, a diamond shaped, a grid shaped, a cylindrical shaped, a spherical shaped, a circular shaped or any of the above, where a hole or holes.

7. The product according to the claim 1 the product has been designed so that air reach the fire and embers.

8. The product according to the claim 1 the product is as an element of the fire place or separating installed.

9. The product according to the claim 1 the product is a part of the heat storage stove or the oven.

10. The product according to the claim 1 the product resists heat of the fireplace, for example, contains necessary extension space in the inner part.