JP2004132609A - Hot-air circulating gas oven using infrared gas burner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot-air circulating gas oven using an infrared gas burner constituted by use of a burner generating large radiant heat with less gas consumption. <P>SOLUTION: This gas oven comprises the infrared gas burner 11 having a heating plate 12 red-heating by combustion heat to generate infrared ray; a heated part 14 for supporting a part 13 to be heated, which is arranged in a position directly receiving combustion heat including the infrared ray radiated from the heating plate 12; a combustion heat circulating passage 34 for guiding the combustion heat to above the heated part 14 once and then to under the heated part 14 to heat the heated part 14 from under, and guiding the heat to the heated part 14 again; and a suction and exhaust part 36 for moving an air flow for carrying the combustion heat in the circulating passage 34. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hot air circulation type gas oven using an infrared gas burner.
[0002]
[Prior art]
For example, in a gas oven for mass cooking, a method is employed in which hot air obtained by burning a large amount of gas is sent into a cooking chamber and heat is absorbed by a temperature difference from the surface of the food, which takes a long time to cook and consumes. There is a problem that the gas amount is not small. In the case of gas ovens for small and medium-sized cooking, cooking is done by closing the door each time, but the furnace body must be heated before putting food ingredients, and the time required for baking is long, so it is consumed. The amount of gas is large, and the treatment of a large amount of combustion exhaust gas is also difficult.
[0003]
[Problems to be solved by the invention]
The present invention has been made by paying attention to the above points, and the problem is that a hot air circulation type gas using an infrared gas burner configured by efficiently using a burner that generates a larger radiant heat with a smaller gas consumption. Is to provide an oven.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an infrared gas burner having a heating plate that generates infrared rays by glowing red by combustion heat, and is disposed at a position that directly receives combustion heat including infrared rays radiated from the heating plate. A heated portion for supporting the heated object, and the combustion heat is once guided above the heated portion, then guided below the heated portion, the heated portion is heated from below, and the heated portion is again heated. A means for configuring a hot air circulation type gas oven by a circulation path of combustion heat guided to the air and an air intake / exhaust portion for moving an air flow for conveying the combustion heat through the circulation path is provided.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The hot air circulation type gas oven according to the present invention uses an infrared gas burner, and the infrared gas burner has a heat generating plate that generates infrared rays by red heating by combustion heat. The heat generating plate is formed in a plate shape having air permeability by compressing and compressing the metal fiber, and is arranged on one surface of the burner housing which is a heat generating surface. Metal fibers are made of a fibrous inorganic material that is a metal and have a fine fiber structure, so that they quickly glow red and generate strong infrared rays when they glow red.
[0006]
A gas ejection portion having a gas ejection port is arranged in the burner housing, and supplies the air-fuel mixture to the heat generating plate. The gas outlet is an opening for ejecting the air-fuel mixture, and the air-fuel mixture is supplied to the entire surface of the heating plate. In order to attach the heating plate to the housing, the mounting end of the heating plate is filled with a heat-resistant inorganic filler to prevent gas leakage, and then the mounting end of the heating plate is heat-resistant stopper frame Fixed by. The fixing frame has a structure in which the heat generating plate is sandwiched and fixed, and is not screwed so as to penetrate at least the heat generating plate mounting end.
[0007]
A heated portion for supporting the object to be heated is disposed at a position where combustion heat including infrared rays radiated from the heating plate of the infrared gas burner is directly received. The heated portion is where heat of combustion is concentrated, and is a portion corresponding to, for example, Gotoku in a gas range. The portion supporting the object to be heated may rotate or move linearly while receiving the heat of combustion. This makes it easy to equalize the amount of heat received by the object to be heated, adjust the time, and the like.
[0008]
The heat of combustion including infrared rays is once guided above the heated part, then guided below the heated part, and then moved again through the circulation path of the combustion heat and the air flow carrying the combustion heat. And an air intake / exhaust section for causing the air to flow. The circulation path is a path that exits the heated portion and returns to the heated portion, and can heat the object to be heated from below, and further increases the high temperature of the heated area centered on the heated portion. An intake / exhaust section is provided to maintain the formation of such a circulating airflow.
[0009]
In one embodiment, the infrared gas burner, the circulation path, and the intake / exhaust section may be arranged symmetrically with the heated section interposed therebetween. Therefore, the portion to be heated disposed therebetween can receive the combustion heat from both the left and right sides. On the other hand, it is also possible to receive the combustion heat only from one of the left and right sides. It is.
[0010]
Further, the hot air circulation type gas oven of the present invention comprises a main body of the gas oven, and a heat source unit detachably or movably provided with respect to the main body. The heat source unit includes an infrared gas burner, a circulation path, , And the intake / exhaust section, and the heated section can be provided in the main body. In addition, the heat source unit can be removed from the main body, replaced with a unit of the same standard (output) or a different standard (output), and then operated as a hot air circulation type gas oven, which is easy to adapt to the purpose and application. . Therefore, when the heat source unit is detachably attached to the main body by, for example, sliding, the gas and air unions must be connected after the heat source unit is attached to the main body, and the connection must also be made for energization. Thus, the operation preparation is completed. In addition, since the gas consumption is not large in the hot air circulation type gas oven of the present invention, it can be used simply by connecting with a normal gas hose from a propane gas cylinder, and the combustion air has an intake and exhaust unit including a blower. There is no need for factory air. Therefore, stable complete combustion is performed without being blown out even in a closed room where the outside air for combustion cannot be taken in.
[0011]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 shows a first embodiment of a hot air circulation type gas oven 10 using an infrared gas burner according to the present invention. In the figure, reference numeral 11 denotes an infrared gas burner, 12 denotes a heating plate thereof, and a heated portion 14 for supporting a heated object 13 at a position where combustion heat including infrared rays radiated from the heating plate 12 directly reaches. Is arranged.
[0012]
The non-leakage type infrared gas burner 11 using a metal fiber plate applied to the present invention has a casing 15 open on one side and closed on the other side as shown in FIG. It has a basic configuration in which a gas ejection portion 17 is arranged in a space 16, a perforated plate 18 is arranged between the open surface and the gas ejection portion 17, and the open surface is covered with a heating plate 12. In the figure, reference numeral 19 denotes a socket, 21 denotes a nozzle of a gas ejection portion, and the nozzle 21 is provided in a direction and a position where the mixed gas flow does not directly go in the direction of the perforated plate 18 made of punching metal.
[0013]
In order to maintain the airtightness even at a high temperature, the mounting end 22 is heat-resistant to a metal fiber made of stainless steel (of course, other metals may be used) for mounting the heating plate 12. A solidified material is filled, filled, and sealed. The solidified material fills the entire periphery of the mounting end of the heat generating plate 12 and becomes a hard frame after being solidified. Gas leakage is completely stopped by filling and forming a sealing portion made of a heat-resistant caulking agent.
[0014]
The heat-resistant stopper frame 23 is composed of a pair of clamping members arranged to clamp the heating plate 12 from both sides of the plate surface. One of the clamping members is hermetically attached to the open end of the housing 11 by welding, and the other is fixed. The holding member is located outside the one holding member and forms a mounting recess 24 between the holding member and the one holding member. The pair of holding members are integrally assembled by bolts 25 at positions directly contacting with each other, and the tightening force acts as a holding force on the heating element 12.
[0015]
As shown in FIG. 2B, the gas mixture is supplied from an arbitrary fuel gas supply source G to a mixing pipe 30 via a gas amount control valve 26 and an on-off valve 27, and from a blower 28. It is formed by being supplied to the mixing pipe 30 via the air amount adjusting valve 29. When the position of the gas ejection portion 13 is in the housing and the air is supplied by the blower 28, the degree of divergence of the air-fuel mixture discharged from the heating plate 15 can be adjusted from a relatively narrow range to a wider range. The infrared radiation range (see dashed line) changes accordingly. This means that the energy generated by gas combustion can be concentrated in a specific range, that is, the heat of combustion of the gas can be highly utilized. In order to control the combustion, an ignition heater 31, a flame detector 32, and an ignition misfire control device 33 are provided at appropriate places in front of the heat generating plate. Can be controlled.
[0016]
It is preferable that a metal plate be provided in the above-mentioned heated portion 14 because it can be used like a frying pan. As the metal plate, for example, a metal plate coated with a polyfluoroethylene film can be used. Since the combustion heat containing the infrared rays radiated from the infrared gas burner 11 is directed to the heated portion 14, it directly reaches the heated portion 14, but the combustion heat in the other range is also guided to the heated portion 11. The reflection plate 33 is provided so as to perform the operation. The illustrated gas burner 11 is positioned obliquely above the heated portion 14, and a reflection plate 33 provided between them is provided with a circulation path 34 of combustion heat that exits the heated portion 14 and returns to the heated portion 14. Constitutes a part of. In the case of the embodiment, the circulation path 34 takes the form of a vertical circulation, and the outside thereof is surrounded by a heat insulating portion 35.
[0017]
An air intake / exhaust portion 36 is provided in the middle of the circulation path 34 for sucking / exhausting an air flow for conveying the combustion heat and forming and maintaining a circulation. The suction and discharge of the airflow in the intake / exhaust section 36 and the convection flowing from the heated section 14 to the vicinity of the infrared gas burner above are factors that govern circulation. In order to discharge a part of the circulating gas to the outside, an outlet 37 is provided in a part of the circulation path 34 to guide the gas to an exhaust pipe 38. A heat insulating section 39 is provided around the burner so as to bypass the circulation path 34 so that the high-temperature circulating air does not directly touch the infrared gas burner 11.
[0018]
In the hot air circulating gas oven 10 using the infrared burner of the first embodiment configured as described above, when the air-fuel mixture is jetted from the gas injection unit 17, the air-fuel mixture is further dispersed by the perforated plate 18, and from the entire surface of the heating plate 12. It will be in a state of gushing. When the air-fuel mixture is ignited by operating the ignition heater 31 and combustion starts, the heat generation plate 12 is red-heated on the entire surface with the heat generation plate surface as a combustion surface to generate infrared rays including far infrared rays. Since the heat generating plate 12 is made of metal fiber, the red heat is generated quickly, and the infrared light starts to be generated quickly, so that the efficiency is very good.
[0019]
The heat of combustion including infrared rays radiated from the heat generating plate 12 heats the heated portion 14, raises the ambient temperature and rises, moves along the circulation path 34, is sucked by the suction / exhaust portion 36, and is urged. Is discharged at This combustion air flow moves through the circulation path 34 while heating the heated portion 14 from below, and on the heated portion, merges with the combustion heat including the infrared rays radiated from the heating plate to bring the atmosphere closer to a thermal equilibrium state. However, the device of the present invention has very good thermal efficiency, so that the target temperature is very quickly reached.
[0020]
3 and 4 show a second embodiment. As is clear from FIG. 3, according to the second embodiment, in the hot air circulating gas oven 10 using the infrared gas burner 11 shown in the first embodiment, the heated portion 41 that supports the object to be heated is replaced with the heated portion 41. Therefore, the reference numerals of the first embodiment are used for common components, and a detailed description is omitted. The heated portion 41 is set on a rotary table 42, and the rotary table 42 is provided on a shaft 44 that is supported by a bearing 43 at a lower portion, and is rotatable by receiving power transmitted from a driving unit 45 by a transmission unit 46. It has become. The power unit is thermally isolated from the inside of the oven by the heat insulating unit 47.
[0021]
Reference numeral 48 denotes a high-pressure blower that takes charge of intake and exhaust in the intake / exhaust section 36. Reference numeral 49 denotes a fin for dispersing the discharged hot air, and guides the hot air toward the heated portion 41 wider than that of the first embodiment. Reference numeral 51 denotes an exhaust port, 52 denotes a main body of the gas oven, and 53 denotes an openable / closable window, which is provided for putting a heated portion into and out, and for observing a heating state from the outside. As described above, in the case of the second embodiment, since the rotary type heated portion 41 is provided, uneven heating can be eliminated, and the heating efficiency for the heated portion is improved accordingly.
[0022]
A third embodiment of the present invention is shown in FIG. The third embodiment is an example including a gas oven main body 60 and a pair of heat source units 61 and 62 provided so as to be able to be inserted into and removed from the main body 60 in the left-right direction. For this purpose, the main body 60 is provided with guide portions 63 and 64 extending in the left-right direction, and the guided portions 65 and 66 guided by the guide portions 63 and 64 are provided on the heat source units 61 and 62. The guide portions 63 and 64 and the guided portions 65 and 66 have a concave structure and a convex portion that engages with the concave structure, but may include a rail and wheels.
[0023]
The main body 60 is provided with casters 67 and is fixed by the fixed legs 68 when moved to the target position. The main body 60 has an operation control panel 70, and controls the supply of gas, the supply of power, and all other operations necessary for the operation of the gas oven of the third embodiment. The main body 60 also functions as a gas source plug 71 for gas supply, a gas unit valve 72, a high-pressure blower 73 for air supply, an air filter 74 for purifying intake air, and a part for supporting an object to be heated. A driving unit 76 for a conveyor device 77 that moves the object to be heated 75 linearly is provided. Although FIG. 5 shows a state in which the right heat source unit 62 is replaced with a larger heat source unit than the left heat source unit 61, the same applies to the conveyor device 77. The conveyor device 77 has sprocket wheels 78 and 79 arranged at both ends in the longitudinal direction of the main body, and a chain conveyor 80 wound around them. 81 indicates a chain guide.
[0024]
The heat source units 61 and 62 are provided with an infrared gas burner 11 having a heat generating plate 12 for generating heat of combustion including infrared rays, and also guide the heat of combustion from above to below the portion to be heated 75 and again to the portion to be heated 75. This is an integrated structure in which a circulation path 34 and an intake / exhaust portion 36 for assembling the combustion air flow through the circulation path 34 are assembled. Since the basic configuration is the same as that of the first embodiment, the detailed description will be replaced with the corresponding reference numerals. In each of the drawings, reference numeral 82 denotes an electromagnetic on-off valve for supplying gas, 83 denotes a gas amount control valve, 84 denotes a combustion air control valve, 85 denotes a union joint for gas connection, 86 denotes a union joint for air connection, and 87 denotes a control. A connector for connecting an electric circuit for use, and also supplies power to an alarm board 88 attached to the automatic ignition device. Reference numeral 89 denotes a gas-air mixer.
[0025]
The gas oven of the present invention shown in the third embodiment has a configuration in which a pair of left and right heat source units 61 and 62 are arranged in the conveyor direction, but in FIGS. The heat source unit on the rear right side is removed with the control panel 70 facing the front, and the chin conveyor 81 is exposed. Similarly, the heat source unit 62 on the front right side is illustrated with the cover removed, and the inside is described by exposing the electromagnetic on-off valve 82 and the like.
[0026]
The feature of the third embodiment of the present invention is that a pair of left and right heat source units 61 and 62 can simultaneously heat a heated portion 75 between them, and the heated portion 75 moves linearly by a conveyor device 77. And the heat source units 61 and 62 can be set to be immediately operable by the union (85, 86) or the connector connection (87) of the electric wiring. The conveyor device 77 moves the heated parts 61 and 62 in one direction and completes the necessary heat treatment during the operation method, or the reciprocating movement of the heated parts 61 and 62 in the forward and reverse directions. Either of the methods can be used, and it is of course possible to stop.
[0027]
【The invention's effect】
Since the present invention is constructed and operates as described above, it can be appreciated that in some experiments the gas consumption was reduced to one third of that of a conventional gas oven. The remarkable reduction in fuel consumption and the amount of combustion gas generated can be obtained, which can stop environmental degradation.On the other hand, as a gas oven, it is possible to maintain the higher temperature than before and obtain the best heating result Therefore, a remarkable effect is brought about, such as bringing a remarkable improvement in performance from large-scale cooking to small-volume cooking, and being applicable to fields other than cooking.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view relating to a first embodiment of a hot air circulation type gas oven using an infrared gas burner according to the present invention.
FIG. 2 (a) is a front view showing an example of an infrared gas burner of the above device.
(B) A longitudinal sectional view of FIG.
FIG. 3 is an explanatory cross-sectional view of a second embodiment of the present invention.
FIG. 4 is an external view of the same.
FIG. 5 is a partial sectional front view according to a third embodiment of the present invention.
FIG. 6 is a side view of FIG.
FIG. 7 is a plan view of the same.
[Explanation of symbols]
Reference Signs List 10 Gas oven 11 according to the present invention Infrared gas burner 12 Heating plate 14, 41, 75 Heated part 34 Circulation path 36 Intake / exhaust part 39 Insulation part 42 Rotary table 52, 60 Main body 61, 62 Heat source unit 77 Conveyor device

Claims (5)

An infrared gas burner that has a heating plate that generates infrared rays by igniting the heat of combustion, and is heated at a position that directly receives combustion heat containing infrared rays radiated from the heating plate to support an object to be heated. Part, the combustion heat is once guided above the heated part, then guided below the heated part, the heated part is heated from below, and the circulation path of the combustion heat is guided again to the heated part, and combustion. A hot air circulation type gas oven using an infrared gas burner including an air intake / exhaust unit for moving an air flow for conveying heat through a circulation path. 2. A hot air circulation gas oven using an infrared gas burner according to claim 1, wherein the heated portion is provided such that a portion supporting the heated object rotates or moves linearly while receiving combustion heat. . 3. A hot air circulation type using an infrared gas burner according to claim 1 or 2, wherein the infrared gas burner, the circulation path, and the intake / exhaust section are arranged symmetrically with the heated section interposed therebetween. Gas oven. An infrared gas burner comprising a main body of a gas oven and a heat source unit provided detachably or movably with respect to the main body, wherein the heat source unit has a heat generating plate that emits infrared light by glowing red by combustion heat, The heat of combustion including infrared rays is once guided above the heated portion, then guided below the heated portion, the object to be heated is heated from below, and the combustion heat circulation path is again guided to the heated portion, and the combustion heat. A heat source for supporting an object to be heated, which is assembled with an intake / exhaust portion for moving an air flow for conveying the air through a circulation path, and is disposed at a position directly receiving combustion heat including infrared rays radiated from the heating plate. A hot air circulation type gas oven using an infrared gas burner, wherein the part is installed in the main body. The hot air using an infrared gas burner according to claim 4, wherein the pair of heat source units provided detachably with respect to the main body of the gas oven are detachable from the main body and can be replaced with those of the same standard or a different standard. Circulating gas oven.

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