CLOSED-TYPE RADIANT GAS RANGE

Abstract

 The present invention relates to a sealed gas range using radiant heat, and more particularly, to a sealed gas range using radiant heat, which includes: a gas nozzle to which gas is supplied; a mixing chamber which communicates with the gas nozzle and forming a space in which the gas is premixed; a burner housing which communicates with the mixing chamber to form a space; a glass part shielding an outer circumferential surface of the burner housing; and a burner mat having a porous shape seated in the burner housing, in which the burner mat is formed by two or more layers of porous bodies having different densities.

Description

[Technical Field]

[0001] The present invention relates to a sealed gas range using radiant heat, and more particularly, to a sealed gas range using radiant heat, which is high in efficiency using strong radiant combustion heat by an excess enthalpy effect formed by a submerged flame inside a porous medium burner mat having a multi-layer mat made of ceramic materials having different densities and is safe from harmful combustion exhaust gas and convenient to use.

[Background Art]

[0002] Among main substances of indoor air pollution, fine dust with PM 10 and PM 2.5 or less, carbon monoxide (CO), formaldehyde, and total airborne bacteria (including VOCs) are classified as four representative pollutants. Among them, carbon monoxide (CO) is inevitably generated during cooking through the combustion of gas fuel in most cookers, and has always been the target of attack by comparative sales of cookers with other heat sources (electricity, etc.).

[0003] In addition, after the mackerel incident related to the cause of fine dust that has persisted for several years, since there is a situation in which gas consumption decreases due to avoidance of use of gas ranges for home and commercial use which have been recognized as the main culprit of indoor air pollution, which accounts for the majority of civilian gas consumption, there is an urgent need to launch a new gas cooker through heating technology of a new paradigm that will overcome the sentiment of avoidance of gas cookers from the emission controversy.

[0004] In general, heat is transferred in the form of conduction, convection, and radiation energy. However, in the case of conventional gas range burners, combustible gas, which is a fuel, is ejected from a small flame hole of a burner head to form a flame in the form of a jet flame and in the case of the heat transfer from the flame, and the combustion heat is transferred in the form of convection and radiant heat transfer to heat an object to be heated (pot, etc.). In this case, the heat of combustion of convective heat transfer directly contacts the object to be heated in the form of a flow of the transfer medium to transfer heat (heating), and the heat of combustion of radiant heat transfer is transferred in the form of a wave such as light regardless of the transfer medium. Therefore, in a jet-type convection cooker in which the flame directly hits and heats the cold heated object (pot, etc.), like a conventional open gas range, the flame is cooled by the relatively cold heated object, resulting in an incomplete combustion state, as a result, substances harmful to the human body such as carbon monoxide (CO) are discharged.

[0005] On the other hand, gas range types, which are typical indoor cookers, are classified into open and closed types as specified in KSB 8114, and the open type is a structure in which a jet-type gas range burner and flame are directly exposed to the user, which is harmful to combustion, and the gas is inhaled directly by the user. In addition, due to these problems of open gas ranges, such as frequent overflow of broth during cooking, inconvenience of cleaning due to this, and the occurrence of flames due to wind and broth, the trend is rising in which electric ranges are preferred despite the recent billing for usage fees higher than gas fuel costs.

[0006] In contrast, the sealed gas range has a structure similar to that of an electric range (induction range), and the heat-resistant glass is covered on the top plate, and the burner is mounted under the top plate, so that the flame is not directly exposed to the user. Therefore, the sealed gas range is relatively environmentally friendly to the user, and it is possible to prevent the flame out phenomenon (extinction), and there is an advantage of being easy and convenient to clean, like an electric range, even when the soup overflows during cooking.

[0007] However, most of the conventional sealed gas range burners are burners that mainly use the convective combustion heat of jet flame, and the flow heat of the convective combustion heat cannot be transferred directly to the object to be heated (pot, etc.) because it is blocked by the heat-resistant glass covered on the burner and it has been pointed out as a drawback that the heat efficiency is low compared to the open gas range and the penetration rate is low because it is heated as part of the relatively weak radiant heat.

[0008] For example, Korean Patent Publication No. 10-00698293 discloses a technology related to a radiation heating gas range. Looking at the technical features of the radiant heating gas range, an inlet through which external air flows into the casing is formed, and a blower fan for intake and discharge of external air is installed to supply a sufficient amount of air for combustion inside the burner. However, only the air for combustion is supplied, the disadvantage of low thermal efficiency still remains.

[0009] Therefore, the present invention as an invention that enhances the radiant heat transfer properties irrelevant to the intermediate medium in the existing technology that inevitably heats in the form of an open cooker by considering the disadvantages of the conventional open gas range and the advantages of the electric range to improve the indoor air quality and to promote gas consumption by overcoming the avoidance of gas appliances is a technology that improves thermal efficiency equal to the conventional open type and realizes convenience, which is a great advantage of a sealed type by inventing a sealed gas range through strong radiant combustion technology of an excess enthalpy effect in a porosity.

[Prior Arts]

[Patent Document]

[0010] (Patent Document 1) Korean Patent Registration No. 10-0698293 (March 23, 2007)

[Disclosure]

[Technical Problem]

[0011] The present invention is contrived to solve the problems of the prior art described above and an object of the present invention is to provide a sealed gas range using radiant heat, which is high in thermal efficiency.

[0012] Objects to be solved by the present invention are not limited to the aforementioned objects and other unmentioned objects to be solved by the present invention will be clearly understood by those skilled in the art from the following description.

[Technical Solution]

[0013] A sealed gas range using radiant heat according to a preferred embodiment of the present invention includes: a gas nozzle to which gas is supplied; a mixing chamber which communicates with the gas nozzle and forming a space in which the gas is premixed; a burner housing which communicates with the mixing chamber to form a space; a glass part shielding an outer circumferential surface of the burner housing; and a burner mat having a porous shape seated in the burner housing, in which the burner mat is formed by two or more layers of porous bodies having different densities.

[0014] Further, according to a preferred embodiment of the present invention, in the case of the burner mat, a density of a porous body located on the top is relatively lower than that of a burner mat located on a lower side.

[0015] Further, according to a preferred embodiment of the present invention, the burner mat is configured to include a first mat layer formed in a porous shape and seated on a bottom surface of the burner housing, and a second mat layer located on the top of the first mat layer and formed by a porous body having a relatively lower density the first mat layer.

[0016] Further, according to a preferred embodiment of the present invention, the burner mat includes a first mat layer formed in the porous shape and provided in the burner housing, and a second mat layer located on one outer side of the first mat layer and formed by the porous body having the relatively lower density the first mat layer, and the first mat layer and the second mat layer are provided in a cylindrical shape.

[0017] Further, according to a preferred embodiment of the present invention, the burner mat is configured by a porous body made of a ceramic material and is made of a silicon carbide (SIC) material having relatively large heat resistance among the ceramic materials.

[0018] Further, according to a preferred embodiment of the present invention, a central portion of the burner mat has a through-hole having a large diameter and the remaining portion other than the central portion of the burner mat has a through-hole having a relatively smaller than diameter than the through-hole provided at the central portion of the burner mat.

[Advantageous Effects]

[0019] By the solving means of the object, the sealed gas range using radiant heat according to the present invention blocks direct transfer of harmful combustion exhaust gas such as carbon monoxide (CO) to a user and generates strong and stable high radiant combustion heat due to occurrence of an excess enthalpy phenomenon in which a temperature of a flame submerged by heat recirculation in a porous body becomes higher than an adiabatic flame temperature as the flame is heated while being continuously submerged into an uppermost layer in a porous burner having a multi-layer mat structure. Unlike convective heat transfer heat, radiant heat has the property of transferring heat in the form of waves. Therefore, a tempered glass type glass part reliably blocks the harmful exhaust gas generated by combustion of gas fuel and the radiant heat has a property of penetrating a glass medium in the form of the wave, and as a result, there is an effect of providing a sealed gas cooker function to heat an object to be heated (pot, etc.) with strong radiant heat energy of excess enthalpy combustion formed in a porous body while being safe for a user by using radiant heat transfer characteristics.

[Description of Drawings]

[0020] 

FIG. 1 is a perspective view of a sealed gas range using radiant heat according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a sealed gas range using radiant heat according to a first embodiment of the present invention.

FIG. 3 is a side cross-sectional view of a burner mat of a sealed gas range using radiant heat according to a first embodiment of the present invention.

FIG. 4 is a plan view of a burner mat of a sealed gas range using radiant heat according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a burner mat of a sealed gas range using radiant heat according to a third embodiment of the present invention.

[Modes of the Invention]

[0021] Terms used in the present specification will be described in brief and the present invention will be described in detail.

[0022] Terms used in the present invention adopt general terms which are currently widely used as possible by considering functions in the present invention, but the terms may be changed depending on an intention of those skilled in the art, a precedent, emergence of new technology, etc. Accordingly, a term used in the present invention should be defined based on not just a name of the term but a meaning of the term and contents throughout the present invention.

[0023] Further, throughout the specification, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0024] An embodiment of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings so as to be easily implemented by those skilled in the art. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0025] Specific matters including problems to be solved for the present invention, a solving means of the problems, and the effect of the invention for the present invention are included in exemplary embodiments and drawings to be described below. Advantages and features of the present disclosure, and methods for accomplishing the same will be more clearly understood from embodiments described in detail below with reference to the accompanying drawings.

[0026] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0027] As illustrated in FIGS. 1 and 2, a radial gas heater with a design function according to a first embodiment of the present invention communicates with a gas nozzle 10 to which gas fuel is supplied and a mixing chamber 20 that forms a space in which the gas fuel and combustion air are premixed. Further, the radial gas heater is configured to include a burner housing 30 which communicates with the mixing chamber 20 and forming a space, a glass part 40 shielding an outer circumferential surface of the burner housing 30, and a burner mat 50 in which porous media seated on the burner housing 30 are formed in a multi-layer structure.

[0028] First, the gas nozzle 10 is provided in a gas range according to the present invention. The gas nozzle serves to guide external gas fuel and the combustion air which are premixed to be supplied to the mixing chamber 20.

[0029] The mixing chamber 20 is provided at the end of the gas nozzle 10. The mixing chamber 20 has a predetermined space therein, and the gas fuel flowing into the gas nozzle 10 and the combustion air are mixed in the mixing chamber 20. An upper portion of the mixing chamber 20 is formed to be opened so that the premixed mixture is burned in the burner mat 50 and then, ejected toward the burner housing 30.

[0030] The burner housing 30 is provided on the upper portion of the mixing chamber 20. A predetermined space is provided in the burner housing 30 to constitute a combustion chamber. An exhaust port (not illustrated) through which exhaust gas generated during combustion is discharged is formed at the edge of the combustion chamber.

[0031] The glass part on which cooling utensils (port, etc.) may be placed is provided on an upper surface of the burner housing 30. The glass part 40 serves to prevent combustion exhaust gas harmful to a human body, such as carbon monoxide (CO) generated from a gas fuel flame from being directly transferred to a user by sealing the burner housing 30.

[0032] In addition, the burner mat 50 which is a multi-layer porous structure of two or more layers is provided in the burner housing 30.

[0033] The burner mat 50 has an ignition device (not illustrated) provided at one side to serve as a heat source that generates a strong radiant wave transferred from the mixing chamber 20 to the burner housing 30. Further, the burner mat 50 is preferably made of a silicon carbide (SiC) material having large heat resistance so as to enable strong excess enthalpy combustion.

[0034] The burner mat 50 may be configured variously for the above-described functions and for example, may be configured as follows.

[0035] The burner mat 50 may be constituted by two or more porous layers having different densities as illustrated in FIGS. 2 and 3. In this case, the porous layers may have different densities while being configured in porous shapes having different sizes.

[0036] More specifically, the burner mat 50 may be formed in a two-layer structure, and may include a first mat layer 52 and a second mat layer 54. The first mat layer 52 may be formed to be seated on the bottom surface of the burner housing 30 and the second mat layer 54 may be seated on the top of the first mat layer 52.

[0037] In this case, the porous body of the second mat layer 54 has a smaller density than the porous body of the first mat layer 52 so that the flame is quickly submerged and settled inside the second mat layer 54. That is, the porous body of the second mat layer 54 has a smaller density than the porous body of the first mat layer 52. Further, this is to maximize radiant heat discharged from the upper portion of the second mat layer 54 and transferred to an object to be heated and stably continue the flame when the mixture is burned by the ignition device by forming an optic thickness related to radiation performance of the flame formed in the second mat layer 54 larger.

[0038] In addition, in the first mat layer 52 having a high density of the porous body, since the gas movement speed of an unburned pre-mixture is high, the submerged flame formed inside the second mat layer 54 may not enter the porous body. That is, in the first mat layer 52 having a high density of the porous body, the flame is formed in the form of the submerged flame at a boundary surface position relatively to the second mat layer 54. Accordingly, the first mat layer 52 serves to effectively prevent a flash-back in which the strong radiant flame formed in the second mat layer 54 is transferred to and enters the mixing chamber 20.

[0039] Moreover, the density of the porous body of the second mat layer 54 and the density of the porous body of the first mat layer 52 are preferably formed in a ratio of 1:4 to 1:6. When the ratio of the density of the porous body of the second mat layer 54 and the density of the porous body of the first mat layer 52 is less than 1:4, a flowing speed of the unburned mixture in the first mat layer 52 decreases, and as a result, a flash-back prevention function is insufficient. Accordingly, there is a problem in that when a combustion condition is changed, the flash-back may occur. Further, when the ratio of the density of the porous body of the second mat layer 54 and the density of the porous body of the first mat layer 52 is more than 1:6, the flowing speed of the unburned mixture in the first mat layer 52 decreases, and as a result, there is a problem in that a time required for stabilizing increases and the flame is easily blown out. Accordingly, the ratio of the density of the porous body of the second mat layer 54 and the density of the porous body of the first mat layer 52 is 1:4 to 1:6.

[0040] Further, a thickness ratio of the second mat layer 54 and the first mat layer 52 is preferably 1:2 to 1:3. When the thickness ratio of the second mat layer 54 and the first mat layer 52 is less than 1:2, there is a problem in that a time to control the flash-back is shortened when the flash-back occurs and it is difficult to form a uniform flow field important in submerging combustion. In addition, when the thickness ratio of the second mat layer 54 and the first mat layer 52 exceeds 1:3, the pressure loss in the supply of the unburned mixture increases, and the loss of combustion heat for heating the porous body increases in a submerged flame form that directly heats the porous body, and as a result, efficiency decreases. Accordingly, the thickness ratio of the second mat layer 54 and the first mat layer 52 is preferably 1:2 to 1:3.

[0041] Next, the burner mat 50 may be composed of one or two or more of alumina (AI203), silicon carbide (SiC), silica (SiO2), magnesia (MgO), and the like. Among them, as shown in the following table, the burner mat 50 is preferably made of silicon carbide capable of withstand an actual temperature of 1300 to 1400°C.

[Table 1]

Material	Applied temperature	Applicable
Alumina	≤ 1200°C	X
Silicon carbide	≤ 1500°C	O
Silica	≤ 1100°C	X
Magnesia	≤ 1100°C	X

[0042] Hereinafter, an operation for the sealed gas range using radiant heat according to the present invention will be described.

[0043] First, when the gas range is driven, fuel gas and combustion air from the gas nozzle 10 flow into the mixing chamber 20, and the gases are premixed in the mixing chamber 20, and then, move to the burner mat 50. In this case, combustion is performed through an ignition device (not illustrated), and the flame is generated in the burner mat 50. In this case, the burner mat 50 is divided into the first mat layer 52 and the second mat layer 54. The first mat layer 52 has a high density of the porous body so that the flow of the premixed gas mixture is faster than that of the second mat layer 54. That is, in the second mat layer 54, the flow of the gas mixture is slower than that of the gas mixture of the first mat layer 52 having a high density of the porous body.

[0044] In this case, a flame forming radiant combustion heat of excess enthalpy is formed at the boundary between the first mat layer 52 and the second mat layer 54 in the burner mat 50, and submerged combustion is made inside the second mat layer 54. Therefore, while the mixed gas is preheated at high temperature by excess enthalpy combustion heat due to heat recirculation inside the porous body by the flame submerged between the first mat layer 52 and the second mat layer 54, an increase in the temperature of the flame is induced. In respect to the increased temperature of the flame, a strong radiant flame is formed at the boundary between the second mat layer 54 and the first mat layer 52 by a so-called feedback heat recycling principle that preheats the mixer by recirculating combustion heat upstream of the porous body, and as a result, the flame of the burner mat 50 generates stable and strong radiant energy, thereby increasing the efficiency.

[0045] Hereinafter, a sealed gas range using radiant heat according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the embodiment, from the first embodiment, there is a difference in that a central portion of the burner mat 60 has a through-hole having a large diameter, and the remaining portion other than the central portion of the burner mat 60 has a through-hole having a relatively smaller diameter than the through-hole provided at the central portion of the burner mat 60. In the embodiment, for a configuration overlapped with the first embodiment, the description of the first embodiment will be used.

[0046] Referring to FIG. 4, the central portion of the burner mat 50 have the through-hole having the large diameter, and the remaining portion other than the central portion of the burner mat 50 may have the through-hole having the relatively smaller diameter than the through-hole provided at the central portion of the burner mat 50. That is, the burner mat 50 according to the first embodiment of the present invention is provided as a porous body having a uniform through-hole as illustrated in FIG. 4(a) and in the burner mat 60 according to the second embodiment of the present invention, the central portion of the burner mat 60 may have the through-hole having the larger diameter and the remaining portion other than the central portion of the burner mat 60 may have the through-hole having a small diameter. Therefore, when the through hole having the large diameter is provided in the central portion of the burner mat 60 as illustrated in of FIG. 4(b), the central portion of the burner mat 60 has greater firepower than the remaining portion other than the central portion of the burner mat 60. That is, the burner mat 60 may be usefully used at a place where concentration of the firepower is required.

[0047] Hereinafter, a sealed gas range using radiant heat according to a third embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the embodiment, there is a difference from the first embodiment in that the mixing chamber 20, the burner mat 70, and the glass part 80 are provided in a cylindrical shape. In the embodiment, for a configuration overlapped with the first embodiment, the description of the first embodiment will be used.

[0048] Referring to FIG. 5, the burner mat 70 includes a first mat layer which is formed in a porous body shape and provided in the burner housing 30 and a second mat layer 74 which is formed on one outer side of the first mat layer 72 and formed as a porous body having a relatively lower density than the first mat layer 72. The first mat layer 72 and the second mat layer 74 are provided in the cylindrical shape. Accordingly, heat generated in the burner mat 70 is not concentrated upwards, but spreads in all directions. That is, the burner mat 70 may be usefully used when trying to spread the generated heat in all directions.

[0049] As described above, those skilled in the art will be able to understand that a technical configuration of the present invention can be easily executed in other detailed forms without changing the technical spirit or an essential feature thereof.

[0050] Therefore, the embodiments described as above are exemplary in all aspects and should be understood as not being restrictive and the scope of the present disclosure is represented by claims to be described below rather than the detailed description, and it is to be interpreted that the meaning and scope of the claims and all the changes or modified forms derived from the equivalents thereof come within the scope of the present invention.

[Explanation of Reference Numerals and Symbols]

[0051] 

10: Gas nozzle

20: Mixing chamber

30: Burner housing

40: Glass part

50: Burner mat

52: First mat layer

54: Second mat layer

60: Burner mat

70: Burner mat

72: First mat layer

74: Second mat layer

80: Glass part

Claims

1. A sealed gas range using radiant heat, comprising:

a gas nozzle to which gas is supplied;

a mixing chamber which communicates with the gas nozzle and forming a space in which the gas is premixed;

a burner housing which communicates with the mixing chamber to form a space;

a glass part shielding an outer circumferential surface of the burner housing; and

a burner mat having a porous shape seated in the burner housing,

wherein the burner mat includes

a first mat layer formed in a porous shape and seated on a bottom surface of the burner housing; and

a second mat layer located on the top of the first mat layer,

the density of the porous body of the second mat layer and the density of the porous body of the first mat layer are formed in a ratio of 1:4 to 1:6, and

the thicknesses of the second mat layer and the first mat layer are formed in a ratio of 1:2 to 1:3.

2. The sealed gas range using radiant heat of claim 1, wherein the burner mat is formed by a ceramic porous body made of silicon carbide (SiC).

3. The sealed gas range using radiant heat of claim 1, wherein a central portion of the burner mat has a through-hole having a large diameter and the remaining portion other than the central portion of the burner mat has a through-hole having a relatively smaller than diameter than the through-hole provided at the central portion of the burner mat.

Drawing