WO2020032370A1 - Closed-type radiant gas range - Google Patents

Abstract

The present invention relates to a closed-type radiant gas range and, more specifically, comprises: a gas nozzle through which gas is supplied; a mixing chamber communicating with the gas nozzle so as to form a space in which the gas is premixed; a burner housing communicating with the mixing chamber so as to form a space; a glass part for shielding the outer peripheral surface of the burner housing; and a porous medium-shaped burner mat placed in the burner housing, wherein the burner mat comprises two or more layers of porous media having different degrees of compactness.

Description

Hermetic Radiant Gas Range

The present invention is an enclosed radiant gas range, and more specifically, excess enthalpy formed by submerged flame inside a porous medium burner mat having a multi-layer mat structure of ceramic materials having different densities. (Excess enthalpy) The use of a strong radiant combustion heat by the effect is high efficiency, safe and easy to use from harmful combustion exhaust gas sealed radiant gas range.

Among the major pollutants of indoor air pollution, fine dust of PM 10 and PM 2.5 and below, carbon monoxide (CO), formaldehyde, and total suspended bacteria (including VOCs) are classified into four major pollutants. Among them, carbon monoxide (CO) is inevitably generated when cooking through gas fuel in most cookers, and has always been a target of comparative sales of cookers of other heat sources (electricity, etc.).

In addition, gas consumption is shrinking due to the avoidance of domestic and commercial gas stoves, which account for the majority of civilian gas consumption since it was recognized as the main culprit of indoor air pollution after the mackerel happiness related to the cause of fine dust lasting for many years. There is an urgent need for the launch of new gas cookers through the heating technology of a new paradigm that will overcome the avoidance of gas cookers.

In general, heat is heat transferred in the form of conduction convection and radiation energy. However, in the case of a conventional gas range burner, flammable gas, which is fuel, is ejected from a small flame hole (flame hole) of the burner head to form a flame in the form of a jet flame. Heat transfer from the flame is transferred to the combustion heat in the form of convection and radiant heat transfer. The water (pot, etc.) is heated. In this case, the heat of combustion of convective heat transfer is in direct contact with the material to be heated in the form of a flow of the transfer medium, and the heat of heat is radiated. Will be delivered in the form of waves). Therefore, the jet-type convection cooker that directly hits and heats a cold target (pot, etc.) like a conventional open gas stove is cooled by a relatively cold target. Therefore, harmful substances such as carbon monoxide (CO) are emitted.

On the other hand, the gas cooker, which is a typical cooker in the room, is classified into an open type and an enclosed type, as defined in KSB 8114. The open type is a structure in which a jet type burner and a flame are directly exposed to the user, as is often seen at home. The gas is directly inhaled by the user. In addition, due to these problems of open gas cookers, such as frequent cooking overflows, resulting in inconvenient cleaning, and flame and fire extinguished by wind and broth, electric cookers are preferred to gas cookers despite the high gas bill. The trend is rising.

In contrast, the hermetic gas range has a shape similar to that of an electric range (induction range), in which heat-resistant glass is covered on the upper plate, and a burner is mounted under the upper plate so that the flame is not directly exposed to the user. Therefore, it is relatively environmentally friendly to the user and can also prevent the flame off phenomenon (anti-flame), there is an advantage that is easy to clean, such as electric range, even when the soup overflows during cooking.

However, most of the existing closed gas range burners are burners that mainly use convective combustion heat of jet flames, and the heat of convection combustion heat cannot be directly transferred to the heated object (pot, etc.) by being blocked by the heat-resistant glass which is covered on the burner. It has been pointed out that the diffusion rate is low due to the low heat efficiency compared to the open gas range because it is heated as part of the relatively weak radiant heat.

For example, Korean Patent Publication No. 10-00698293 discloses a technology related to a radiant heating gas range. Looking at the technical features of the radiant heating gas range, the inlet for the outside air is introduced into the casing, a blower fan for intake and discharge of the outside air is installed to supply a sufficient amount of air for combustion in the burner To be. However, the disadvantage is that the thermal efficiency is low only by supplying air for combustion.

Therefore, the present invention contemplates the heating paradigm of the indoor gas cooker to improve the quality of indoor air and to promote gas consumption through gas equipment avoidance psychology in consideration of the shortcomings of the conventional open gas range and the advantages of the electric range. Inevitably, in the existing technology of heating in the form of open cooker, the invention is to enhance the radiant heat transfer property irrespective of the medium, and by inventing a closed gas range through the strong radiant combustion technology of excess enthalpy effect in the porous body, It is a technology that can realize convenience, which is a big advantage of improving heat efficiency and sealing type.

The present invention has been made to solve the problems of the prior art as described above, and an object thereof is to provide a sealed radiant gas range with high thermal efficiency.

The problem to be solved by the present invention is not limited to the above-mentioned problem, another problem to be solved by the present invention not mentioned herein is to those skilled in the art from the following description. It will be clearly understood.

In a sealed radiant gas range according to an embodiment of the present invention, a mixing chamber in which a gas nozzle supplied with a combustible gas as fuel and a gas nozzle are in communication with each other to form a space in which the gas is premixed with combustion air; A burner housing communicating with the mixing chamber to form a space, a glass portion shielding the outer circumferential surface of the burner housing, and a burner mat having a porous medium shape seated on the burner housing, wherein the burner mat includes two or more layers. It is characterized by being formed of porous bodies of different densities.

In addition, the burner mat according to the preferred embodiment of the present invention is characterized in that the density of the porous body of the burner mat positioned at the upper end is smaller than that of the burner mat positioned relatively downward.

In addition, the burner mat according to a preferred embodiment of the present invention is formed in a porous shape and is positioned on the first mat layer and the first mat layer seated on the bottom surface of the burner housing and the first mat layer. It characterized in that it comprises a second mat layer formed of a porous body having a relatively low density.

In addition, the burner mat according to an exemplary embodiment of the present invention may be formed in a porous shape and formed on the outer side of the first mat layer and the first mat layer provided inside the burner housing and the first mat layer. A second mat layer is formed of a relatively low density porous body, wherein the first mat layer and the second mat layer is provided in a cylindrical shape.

In addition, the burner mat according to an exemplary embodiment of the present invention may be formed of a porous material made of ceramic material, and formed of silicon carbide (SIC) material having a relatively high heat resistance among ceramic materials.

In addition, the central portion of the burner mat according to an embodiment of the present invention is provided with a large through hole, the remaining portion except the central portion of the burner mat is relatively diameter than the through hole provided in the central portion of the burner mat This small through hole is provided.

By means of solving the above problems, the hermetic radiant gas range of the present invention is a hermetically sealed type to prevent harmful combustion exhaust gases such as carbon monoxide (CO) from being directly delivered to the user, and has a multi-layer mat structure. As the flame is always submerged inside the top layer of the porous burner, the temperature of the flame immersed by heat recirculation in the porous body becomes higher than the adiabatic flame temperature. An enthalpy phenomenon occurs, producing a powerful and stable high radiant heat of combustion. Unlike convective heat transfer heat, radiant heat transmits heat in the form of waves, so the glass part of tempered glass ensures blocking harmful exhaust gases generated by gas fuel combustion while radiating heat penetrates the glass medium in the form of waves. Therefore, by using the radiant heat transfer characteristics, there is an effect that it is safe for the user and has a closed gas cooker function that heats the heated object (pot, etc.) with strong radiant heat energy of excess enthalpy combustion formed in the porous body.

1 is a perspective view of a hermetically sealed radiant gas stove according to a first embodiment of the present invention.

2 is a block diagram of a hermetically sealed radiant gas stove according to a first embodiment of the present invention.

Figure 3 shows a side cross-sectional view of the burner mat of the hermetic radiation type gas range according to the first embodiment of the present invention.

Figure 4 shows a plan view of the burner mat of the hermetic radiation type gas range according to the second embodiment of the present invention.

5 is a perspective view of a burner mat of a hermetically sealed radiant gas stove according to a third embodiment of the present invention.

Terms used herein will be briefly described, and the present invention will be described in detail.

The terms used in the present invention have been selected as widely used general terms as possible in consideration of the functions in the present invention, but this may vary according to the intention or precedent of the person skilled in the art, the emergence of new technologies, and the like. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the general contents of the present invention, rather than simply the names of the terms.

When a part of the specification is said to "include" any component, this means that it may further include other components, without excluding other components unless otherwise stated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. 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.

Specific matters including the problem to be solved, the means for solving the problem, and the effects of the present invention are included in the following embodiments and the drawings. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

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

As shown in FIGS. 1 and 2, the radial gas heater having a design function according to the first embodiment of the present invention communicates with the gas nozzle 10 to which the gas fuel is supplied and the gas nozzle 10 so as to communicate with the gas nozzle 10. And a mixing chamber 20 which forms a space where fuel and combustion air are premixed. In addition, a burner housing 30 which communicates with the mixing chamber 20 to form a space, a glass part 40 that shields an outer circumferential surface of the burner housing 30, and a porosity that is seated in the burner housing 30. The media comprises a burner mat 50 having a multilayer structure.

First, the gas nozzle 10 is provided in the gas range according to the present invention. The gas nozzle 10 guides the gas nozzle 10 to be supplied to the mixing chamber 20 in a premixed state with an external gas fuel and combustion air.

The mixing chamber 20 is provided at the end of the gas nozzle 10. The mixing chamber 20 is provided with a predetermined space therein, and the gas fuel flowing into the gas nozzle 10 and the combustion air are mixed. The upper mixture is formed so that the premixed mixer is burned in the burner mat 50 and then ejected toward the burner housing 30.

The burner housing 30 is provided at the upper portion of the mixing chamber 20. The burner housing 30 has a predetermined space therein to constitute a combustion chamber. At the edge of the combustion chamber, an exhaust port (not shown) through which exhaust gas generated during combustion is discharged is formed.

The upper surface of the burner housing 30 is provided with a glass portion 40 on which cooking utensils (pots, etc.) can be placed. The glass part 40 serves to seal the burner housing 30 to prevent foreign substances such as combustion exhaust gas harmful to the human body, such as carbon monoxide (CO) generated from a gas fuel flame, to be directly transmitted to the user.

The burner housing 30 is provided with a burner mat 50 having a multi-layer porous structure of two or more layers.

The burner mat 50 is provided with an ignition device (not shown) on one side, and serves as a heat source for generating a strong radiation wave transmitted from the mixing chamber 20 to the burner housing 30. In addition, the burner mat 50 is preferably made of a silicon carbide (SiC) material having a high heat resistance to enable a strong excess enthalpy combustion.

Burner mat 50 may be configured in various ways for the above-described function, for example, may be configured as follows.

As shown in FIGS. 2 and 3, the burner mat 50 may be formed of two or more porous layers having different densities. In this case, the porous layer may be made of porous shapes of different sizes and may have different densities.

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 an upper end of the first mat layer 52.

At this time, the porous body of the second mat layer 54 is formed to have a lower density than the porous body of the first mat layer 52 so that the flame is rapidly submerged into the second mat layer 54 to be seated. do. That is, the porous body of the second mat layer 54 is formed to have a lower density than the porous body of the first mat layer 52. In addition, it forms a larger optical thickness related to the radiation performance of the flame formed inside the second mat layer 54, so that when burned by the ignition device, the second mat layer 54 is formed. This is to maximize the radiant heat discharged from the upper side and transferred to the heated object, and to ensure that the flame is stably maintained.

In addition, since the gas moving speed of the unburned premixer is high in the first mat layer 52 having a high density of the porous body, the infiltrating flame formed inside the second mat layer 54 is formed in the first mat layer 52. ) Does not enter the porous body. That is, in the first mat layer 52 having a high density of the porous body, the first mat layer 52 is formed in the form of an infiltrating flame at a boundary position relatively close to the second mat layer 54 among the first mat layers 52. Accordingly, the first mat layer 52 performs a function of effectively preventing the flash-back that the strong radiation flame formed in the second mat layer 54 propagates into the mixing chamber 20. It is.

In addition, the ratio of the porous density of the second mat layer 54 to the porous density of the first mat layer 52 is about 1: 5. When the ratio of the porous density of the second mat layer 54 and the porous density of the first mat layer 52 is less than 1: 5, the flow of the unburned mixture in the first mat layer 52 is reduced. The speed decreases and the flashback prevention function is insufficient. Therefore, there is a problem that backfire may occur when the combustion conditions change. In addition, when the ratio of the porous density of the second mat layer 54 and the porous density of the first mat layer 52 exceeds 1: 5, the flow of the unmixed mixer in the first mat layer 52 is increased. As the speed increases, the time taken for the flame to stabilize is increased and the flame is easily blown out. Therefore, the ratio of the porous body density of the second mat layer 54 and the porous body density of the first mat layer 52 is preferably about 1: 5.

In addition, the thickness ratio of the second mat layer 54 and the first mat layer 52 is 1: 2 to 1: 3. When the ratio of the thickness of the second mat layer 54 and the first mat layer 52 is less than 1: 2, when the backfire occurs, the time for controlling backfire is shortened and a uniform flow field important for the erosion combustion. There is a difficulty in forming. In addition, when the thickness ratio of the second mat layer 54 and the first mat layer 52 exceeds 1: 3, the pressure loss increases in the supply of the unmixed mixer and the porous body in the form of an infiltrating flame that directly heats the porous body. There is a problem that the efficiency is reduced because the loss of combustion heat for heating the. Therefore, the thickness ratio of the second mat layer 54 and the first mat layer 52 is preferably 1: 2 to 1: 3.

Next, the burner mat 50 may be composed of one or more of alumina (Al203), silicon carbide (SiC), silica (SiO 2), magnesia (MgO), and the like. Of these, it is preferable that the carbide is composed of silicon carbide that can withstand 1300 ° C to 1400 ° C, which is actually formed as in the following table.

material	Application temperature	Applicable
Alumina	≤1200 ℃	X
Silicon carbide	≤1500 ℃	O
Silica	≤1100 ℃	X
magnesia	≤1100 ℃	X

Hereinafter, the operation of the sealed radiant gas range according to the present invention will be described. First, when the gas range is driven, fuel gas and combustion air flow into the mixing chamber 20 from the gas nozzle 10, The gases are premixed in the mixing chamber 20 and then moved to the burner mat 50. At this time, combustion is made through an ignition device (not shown), and a flame is generated in the burner mat 50. At this time, 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 large density of porous bodies, and thus the flow of the premixed mixed gas is faster than that of the second mat layer 54. That is, the flow of the mixed gas is slower than that of the mixed gas of the first mat layer 52 in which the density of the porous body is greatly increased.

At this time, the flame which forms the heat of radiant combustion 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 the second mat layer 54 is formed. Submerged Combustion takes place internally. Therefore, the mixed gas is preheated to a high temperature by an excess enthalpy combustion heat caused by heat recirculation inside the porous body by the flame immersed between the first mat layer 52 and the second mat layer 54. Induce flame temperature rise. The elevated flame temperature is strongly radiated at the boundary between the second mat layer 54 and the first mat layer 52 by a so-called feedback thermal recycling principle that recirculates the combustion heat upstream of the porous body to preheat the mixer. The flame is formed, so that the flame of the burner mat 50 generates stable and strong radiant energy, thereby increasing efficiency.

Hereinafter, a sealed radiant gas range according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, compared to the first embodiment, the central portion of the burner mat 60 is provided with a large through hole, and the remaining portion of the burner mat 60 except for the central portion of the burner mat 60 is There is a difference in that a through hole having a smaller diameter is provided than the through hole provided in the center portion. In the present embodiment, the description of the first embodiment is used for the configuration overlapping with the first embodiment.

Referring to FIG. 4, the central portion of the burner mat 50 is provided with a large through hole, and the remaining portion except the central portion of the burner mat 50 is provided in the central portion of the burner mat 50. A relatively small diameter through hole may be provided. 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 shown in FIG. 4 (a), and the burner mat according to the second embodiment of the present invention ( 60 is a through hole having a large diameter is provided in the center portion of the burner mat 60, as shown in FIG. 4 (b), the through hole having a small diameter is provided in the remaining portion except the center portion of the burner mat (60) It can be. Therefore, as shown in FIG. 4B, when a through hole having a large diameter is provided in the central portion of the burner mat 60, the remaining portion except for the central portion of the burner mat 60 is provided at the central portion of the burner mat 60. You will have greater firepower. That is, it can be usefully used where the concentration of firepower is needed.

Hereinafter, a sealed radiant gas range according to a third embodiment of the present invention will be described in detail with reference to the accompanying drawings. Compared to the first embodiment, the present embodiment has a difference in that the mixing chamber 20, the burner mat 70, and the glass portion 80 are provided in a cylindrical shape. In the present embodiment, the description of the first embodiment is used for the configuration overlapping with the first embodiment.

Referring to FIG. 5, the burner mat 70 is formed in the shape of a porous body and provided on the outer side of the first mat layer 72 and the first mat layer 72 provided in the burner housing 30. And a second mat layer 74 formed of a porous body having a lower density than the first mat layer 72. The first mat layer 72 and the second mat layer 74 are provided in a cylindrical shape. Therefore, the heat generated in the burner mat 70 is spread in all directions rather than concentrated in the upward direction. That is, it can be useful when spreading the generated heat in all directions.

As such, the technical configuration of the present invention described above will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

[Description of the code]

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 (3)

1. A gas nozzle to which gas is supplied;

   A mixing chamber in communication with the gas nozzle to form a space where the gas is premixed;

   A burner housing in communication with the mixing chamber to form a space;

   A glass unit shielding an outer circumferential surface of the burner housing; And

   And a burner mat having a porous shape seated on the burner housing.

   The burner mat,

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

   And a second mat layer positioned on an upper end of the first mat layer.

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

   The thickness of the second mat layer and the first mat layer is a closed radiant gas range, characterized in that formed in a ratio of 1: 2 to 1: 3.
2. The method of claim 1,

   The burner mat,

   Sealed radiant gas cooker, characterized in that formed of a ceramic porous body made of silicon carbide (SiC).
3. The method of claim 1,

   The central portion of the burner mat is provided with a large diameter through hole, and the remaining portion except the central portion of the burner mat is provided with a through hole relatively smaller in diameter than the through hole provided in the central portion of the burner mat. Enclosed radiant gas range.

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