Patent Application
20110094491
The present invention relates to an oil stove, in detail, a re-burning device of a fixed-wick type oil stove.
As well known in the art, wick type oil stoves are classified into a fixed-wick type and a movable-wick type, and the fixed-wick type has a simple structure in comparison to the movable-wick type, such that it can be manufactured and supplied at a low cost.
One of the inventors of the present invention had been manufactured and sold the fixed-wick type oil stoves for satisfying the requirements for a long period of time and a typical type, called a fixed-wick type stove equipped with an oil controller, is disclosed in Patent Document 1.
The fixed-wick type stove equipped with an oil controller includes: a base; a stove body in which a wick tube with a fixed wick therein is disposed at a side of the base, a burning tank is composed of inner and outer burning tanks having an air supply hole (diameter of 1.7 mm) and disposed at a predetermined distance, a support cover and a protective cover are disposed on and around the burning tank, respectively, and re-burning air supply holes are formed at the protective cover and the upper portion of the outer burning tank; an oil supply controller disposed at the other side of the base, connected to the wick tube by a fuel supply tube, and receiving fuel from a fuel tank; and a heat dissipation assembly having a heat dissipation body disposed at the support cover and having a larger diameter than the outer burning tank and through-holes, a cover equipped with stovepipe on the heat dissipation body, and a cylindrical heating member having a plurality of through-holes in the heat dissipation body, in which the through-holes of heat dissipation body have a diameter of around 4 mm.
According to the fixed-wick type stove equipped with an oil controller described above, when fuel of a predetermined level is supplied to the fixed-wick inserted in the wick tube by adjusting the oil supply controller and the fixed-wick is ignited, the fuel evaporates and the evaporated gas is burned in a red heat state by primary air supplied to the air supply holes between the inner and outer burning tanks. Further, the evaporated gas is re-burned in the cylindrical heating member by air supplied to the re-burning air supply holes formed at the protective cover and the upper end of the outer burning tank while moving up to the heat dissipation assembly and then discharged to the stovepipe while heat is dissipated through the side of the heat dissipation body.
However, in the fixed-wick type stove equipped with an oil controller, since ignition is performed after filling the wick tube with fuel of a predetermined level, as the fixed-wick is ignited, the wick tube and the lower portion of the fuel tank are heated by combustion heat due to combustion of evaporated gas and the fuel filled in the wick tube simultaneously evaporates, such that a large amount of evaporated gas is produced. Therefore, incomplete combustion is made until the fuel filled in the wick tube completely evaporates (hereafter, referred to as “earlier ignition”), when the large amount of evaporated gas is burned in the fuel tank, and smell and soot are produced, because the incomplete combustion in the earlier ignition.
Meanwhile, incomplete combustion gas and normal combustion gas (not completely burned) which are produced in the earlier ignition are move up to the heat dissipation assembly and re-burned; however, since the diameter of the heat dissipation body is larger than the diameter of the outer burning tank and the distance between the heat dissipation body and the cylindrical heating member is large, the re-burning volume in the heat dissipation assembly is large. Further, since the air supply holes and the through-holes formed at the heat dissipation body and the cylindrical heating member are formed to have a small diameter of around 4 mm while the distance between the air supply holes and the through-holes are the same as the diameter of the air supply holes and the through-holes, the incomplete combustion gas and the combustion gas move up while dispersing into the heat dissipation body, and re-burning is not performed well, because atmosphere for re-burning the incomplete combustion gas is not made well in the heat dissipation body, that is, the inside of the heat dissipation assembly fails to reach re-burning temperature. Furthermore, as the incomplete combustion gas etc. are not re-burned well, as described above, the heat dissipation body and the cylindrical heating member fail to be in a red heat state and the amount of heat is small, such that it is difficult to achieve good and pleasant heating.
The inventors has completed the present invention by manufacturing a large number of prototypes and performing comparative experiments for a long period of time in order to solve the problems of the fixed-wick type oil stove.
It is an object of the present invention to provide an oil stove that makes it possible for pleasant heating by re-burning well combustion gas burned in a burning tank, without producing incomplete combustion gas in the earlier ignition.
In order to achieve the object of the present invention, an oil stove includes: a base; a stove body in which a wick tube with a fixed wick therein is disposed at a side of the base, a burning tank is disposed on the wick tube, and a protective cover and a support cover are disposed around and on the burning tank, respectively; an oil controller disposed at the other side of the base, connected to the wick tube by a fuel supply tube, and receiving fuel from a fuel tank; and a re-burning unit disposed above the support cover, in which the re-burning unit includes a re-burning tank in a heat dissipation assembly, the re-burning tank is composed of an outer re-burning tank having a lower portion smaller in diameter than the diameter of the outer burning tank, formed in a cylindrical shape with the upper portion narrower than the lower portion, with the upper end closed by a cover and the lower end fixed to the top of the support cover, and an inner re-burning tank formed in a cup shape and inserted in the outer re-burning tank, with the upper end fixed to the cover, and through-holes are formed through the inner and outer re-burning tanks to have a diameter of 6 to 8 mm such that the vertical and horizontal distances between the through-holes are 0.5 to 1.5 mm.
Further, an oil stove includes: a base; a stove body in which a wick tube with a fixed wick therein is disposed at a side of the base, a burning tank is disposed on the wick tube, and a protective cover and a support cover are disposed around and on the burning tank, respectively; an oil controller disposed at the other side of the base, connected to the wick tube by a fuel supply tube, and receiving fuel from a fuel tank; and a re-burning unit disposed above the support cover, in which the re-burning unit includes a re-burning tank in a heat dissipation assembly, the re-burning tank is composed of an outer re-burning tank having a lower portion smaller in diameter than the diameter of the outer burning tank, formed in a cylindrical shape with the upper portion narrower than the lower portion, with the upper end closed by a cover and the lower end fixed to the top of the support cover, and an inner re-burning tank formed in a cylindrical shape with the bottom closed, and inserted in the outer re-burning tank, with the upper end fixed to the cover, and through-holes are formed through the inner and outer re-burning tanks to have a diameter of 6 to 8 mm such that the vertical and horizontal distances between the through-holes are 0.5 to 1.5 mm.
Further, an oil stove includes: a base; a stove body in which a wick tube with a fixed wick therein is disposed at a side of the base, a burning tank is disposed on the wick tube, and a protective cover and a support cover are disposed around and on the burning tank, respectively; an oil controller disposed at the other side of the base, connected to the wick tube by a fuel supply tube, and receiving fuel from a fuel tank; and a re-burning unit disposed above the support cover, in which the re-burning unit includes a re-burning tank in a heat dissipation assembly, the re-burning tank is composed of an outer re-burning tank formed in a cylindrical shape with the upper end closed by a cover and the lower end fixed to the top of the support cover, and an inner re-burning tank formed in a cup shape and inserted in the outer re-burning tank, with the upper end fixed to the cover, and through-holes are formed through the inner and outer re-burning tanks to have a diameter of 6 to 8 mm such that the vertical and horizontal distances between the through-holes are 0.5 to 1.5 mm.
According to the present invention, the re-burning tank of the re-burning unit is composed of inner and outer re-burning tanks, the lower diameter of the outer re-burning tank is smaller than the diameter of the outer burning-tank, and the lower distance of the inner and outer re-burning tanks is larger than the upper distance. Therefore, an amount of incomplete combustion gas or combustion gas produced in the earlier ignition flows up into the inner and outer re-burning tanks with increase in velocity, and quickly flows up while collecting, and high temperature is maintained between the inner and outer burning tanks, such that a good re-burning atmosphere is achieved and the incomplete combustion gas is re-burned well, without soot or harmful gas smell.
Further, since a good re-burning atmosphere is achieved between the inner and outer re-burning tanks, the diameter of the through-holes is large at 6-8 mm, and the vertical and horizontal distances between the through-holes are small at 0.5-1.5 mm, the contact surface area is small in comparison to the amount of combustion gas (the amount of total heat) flowing up into the inner and outer re-burning tanks. Further, since incomplete combustion gas etc. does not stop between the inner and outer tanks, the inner and outer re-burning tanks are maintained in a red heat state, that is, kept heated, such that re-burning incomplete combustion gas etc. is improved and the amount of heat is increased. Furthermore, the red-heated inner and outer re-burning tanks allow the residents to directly see the red heat state, such that a good visual heating effect is achieved.
A reference numeral ‘20’ designates a stove body. In the stove body 20, a pre-heating chamber 21 is formed on the base plate 11 and receives a wick tube 22, a fixed-wick 23 is inserted in the wick tube 22, a burning tank 24 is disposed on the wick tube 22, the burning tank 24 has combustion chambers at a predetermined distance between inner and outer burning tanks 25a, 25b having a plurality of air supply holes 26 (diameter of around 1.7 mm), air supply holes 27 having large diameters (e.g. 5 to 6 mm) is formed around the upper end of the outer burning tank 25b, a protective cover 28 is formed around the burning tank 24 and a support cover 29 is disposed on the burning tank to be supported on the top of the outer burning tank 25b and the top of the protective cover 28.
Further, a primary air supply porous plate 31 and air supply holes 32 are formed at the bottom of the inner burning tank 25a and outside the wick tube 20, respectively.
A reference numeral ‘35’ designates an oil controller. The oil controller 35 is disposed at the other side of the base plate 11 and connected with the wick tube 22 by a fuel supply tube 36. The oil controller 35 receives fuel (petroleum, lamp oil) from a fuel tank 37.
A reference numeral ‘40’ designates a re-burning unit. In the re-burning unit 40, a re-burning tank 42 is disposed in a heat dissipation assembly. The re-burning tank 42 is composed of inner and outer re-burning tanks 43a, 43b. The outer re-burning tank 43b is formed in a cylindrical shape having an upper portion narrower than a lower portion (a conical shape with the top cut), with a cover 44 thereon, the diameter of the lower portion of the outer burning-tank 43b is smaller than the diameter of the outer burning tank 25b, while the inner re-burning tank 43a is formed in a cup shape (cup with the bottom smaller than the inlet diameter) and inserted in the outer re-burning tank 43b and the top is fixed to the cover 44, thereby forming a re-burning chamber having a lower distance larger than an upper distance between the inner and outer re-burning tanks 43a, 43b (e.g. the lower distance is 20 mm and the upper distance is 8 mm, that is, the lower distance is 2.5 times larger than the upper distance).
Further, the through-holes 45a, 45b having a diameter of 6 to 8 mm are formed through the inner and outer re-burning tanks 43a, 43b, and the vertical and horizontal distances between the through-holes 45a, 45b are 0.5 to 1.5 mm.
Further, it is preferable that the inner and outer re-burning tanks 43a, 43b are 55 to 75 mm high and the inner and outer burning tanks 25a, 25b are 150 to 200 mm high.
Further, a combustion gas guide plate 30 with the top inclined to the center is formed at the top on the support cover 29 and the lower end of the outer re-burning tank 43b is connected to the upper end of the combustion gas guide plate 30 such that the combustion gas produced in the burning tank 24 collects and the velocity increases when moving up to the re-burning chamber between the inner and outer re-burning tanks 43a, 43b.
Further, the heat dissipation assembly 41 is fixed to the top of the cover, a stovepipe 46 is formed at one side on the top of the heat dissipation assembly 41, and a baffle 47 is disposed under the stovepipe 46, thereby preventing backflow and keep combustion good.
Further, heat dissipation holes 48 having a diameter the same or larger than the through-holes 45a, 45b of the inner and outer re-burning tanks 43a, 43b are formed under the baffle 47 at one side in the heat dissipation assembly 41, such that the combustion gas produced in the inner and outer re-burning tanks 43a, 43b is prevented from being discharged to the stovepipe 46 by the baffle 47 and heat is dissipated through the heat dissipation holes 48, thereby improving heat dissipation efficiency.
The bottom of the inner re-burning tank 43a is formed in an arc shape in the first to third embodiments such that the combustion gas produced in the burning tank 24 smoothly and quickly flows up into the re-burning chamber between the inner and outer re-burning tank 43a, 43b, thereby further improving combustion.
As described above, according to the present invention, when the fixed-wick 23 is ignited after the wick tube 22 is filled with fuel of a predetermined level by adjusting the oil controller 25, with the stove extinguished, the liquid fuel evaporates and after the evaporated gas is burned in the combustion chamber which is between the inner and outer burning tanks 25a, 25b by primary air supplied to the porous plate 31 and the air supply hole 32, and then mixed with air supplied through the air supply holes 27 formed at the upper end of the outer burning tank 25b and guided and collected to the combustion gas guide plate 30 formed on the support cover 29; and is moved up into the re-burning chamber between the inner and outer re-burning tanks 43a, 43b and re-burned by air supplied through the heat dissipation holes 48 formed at the heat dissipation assembly 41.
The combustion gas (radiation heat) produced by re-burning as described above is discharged through the through-holes 45b formed through the outer re-burning tank 43b, in which some of the combustion gas is horizontally discharged through the heat dissipation holes 48 formed at the heat dissipation assembly 41 and some is discharged through the heat dissipation holes 48 under resistance of the baffle 47; however, the radiation heat that is not discharged through the heat dissipation holes 48 flows around the baffle 47 and is discharged through the stovepipe 46, such that the interior etc. is heated.
Re-burning atmosphere is formed because the primary combustion gas produced in the inner and outer burning tanks 25a, 25b collects and flow up in the re-burning chamber between the inner and outer re-burning tanks 43a, 43b and high temperature is maintained. Further, since the through-holes 45a, 45b formed through the inner and outer re-burning tanks 43a, 43b has the diameter of 6 to 8 mm and the vertical and horizontal distances of the through-holes 45a, 45b are 0.5 to 1.5 mm, the contact surface area is small in comparison to the amount of combustion gas that is re-burned. Therefore, the inner and outer re-burning tanks 43a, 43b are heated in a red heat state, such that complete combustion is made without producing smell and soot.
Further, since the distance between re-burning chambers between the inner and outer re-burning tanks 43a, 43b is larger at the lower portion than the upper portion and the volume of the inner and outer re-burning tanks 43a, 43b is gradually decreased from the lower portion to the upper portion, even if a large amount of evaporated gas is produced in the earlier ignition, the combustion gas produced in the burning tank 24 flows up between the inner and outer re-burning tanks 43a, 43b with increase in velocity. Therefore, the combustion gas does not stop and high-temperature atmosphere is kept good, such that complete combustion can be achieved even in the earlier ignition.
On the basis of the above description, it has been proven that the present invention can implement the best re-burning, as a result of experiments of comparing a prototype with about 10 products having different re-burning methods, after designing the re-burning unit 40 having a specific structure described above, by the inventors.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2008-0097513 | Oct 2008 | KR | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/KR2009/000581 | 2/6/2009 | WO | 00 | 12/21/2010 |
