JPS62142927A - Cooking burner - Google Patents

Abstract

PURPOSE:To improve a heating efficiency of a cooking burner by a method wherein a heat transmitting plate is placed just above a premixing and combustion plate which is composed of a honeycomb structure. CONSTITUTION:Premixed gas formed within a mixing pipe 17 with gas flow injected from a fuel nozzle 24 passes through several through-pass holes 18 of a honeycomb structure 19 made of ceramics so as to form a flame 25 at its upper surface. A radiation ray 26 generated by the flame 25 passes through a heat transmitting plate 21 just above it and then discharged to the surrounding atmosphere while being contacted with a curved part and an outer circumference of a pan 27 from between a thermo-transparent plate holding block 22 and the pan. At the contact part between the heat transmitting plate 21 and the bottom part of the pan 27, heat is transmitted to the bottom part of the pan 27 through a thermal conduction from the thermo-transparent plate 21. Since the honeycomb structure 19 having a high degree of opening is used, a cooking burner having a high heating efficiency can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a stove burner for home or commercial use using gaseous fuel such as city gas or LP glass.

Conventional technology' The conventional stove burner adopts the fx kunsen method as shown in Fig. 2, and consists of a burner body 1 and a burner cap 2.
It is constructed by fitting the There is an air-fuel mixture passage 3 between the burner body 1 and the burner cap 20, and the air-fuel mixture is fed into the outside air from the flame hole 5 along the flow of a solid arrow 4. The air-fuel mixture forms a Bunsen flame 7 between the flame hole 5 and the outside air by secondary air rising along the flow of the solid arrow 6. Trivet 8 is installed directly above the burner cap.

Further, as another conventional example, there is a so-called smooth top type stove burner. As shown in Fig. 3, the combustion plate 10 is a ceramic perforated plate with a relatively low porosity of about 40 to 50%, and a heat transmitting plate 11 made of heat-resistant glass or the like is placed directly above it. A buried top plate 12 was installed, and the exhaust gas generated by combustion on the combustion plate 10 was discharged to the outside air from a rear exhaust hole 14 along a solid arrow 13.

Problems to be Solved by the Invention In the conventional stove burner as shown in FIG. 2, the Bunsen flame 7 forms a ring-shaped flame along the shape of the burner cap 2. Installed pot 15
The tip of the Gunzen flame 8 is located in a ring shape on the bottom of the pot, which makes it impossible to heat the bottom of the pot uniformly.
In terms of cooking properties, for example, when boiling and heating, there is a drawback that parts of the food tend to burn. In addition, in the case of Bunsen flame 7, the flame temperature tends to drop because the air diffuses in the flame, and the temperature of the exhaust gas flow that comes into contact with the bottom of the pot also inevitably drops, resulting in a heating efficiency of 45~
I had no choice but to stay at around 5,096.

On the other hand, in a smooth top type stove burner as shown in Fig. 3, the upper surface of the combustion plate 1o is heated by 800 to 90
Red heat of about 00° C. is generated, and the red heat becomes radiation 16 that passes through the heat transmitting plate 11 and is transmitted to the bottom of the pot 15.

Furthermore, heat conduction due to contact between the heat transmitting plate 11 and the bottom of the pot 15 is also taken into consideration.

Therefore, the bottom of the pot 15 is exposed to the radiation 16 and the heat transmitting plate 11.
It is heated extremely uniformly due to heat conduction.

However, most of the heat flow of the generated exhaust gas is at the exhaust hole 14.
Since the heat is released into the outside air and does not touch the pot 15 at all, the overall heating efficiency has to be extremely low at about 30 to 40 inches.

The present invention is intended to solve such conventional problems, and an object of the present invention is to provide a cooking stove burner which has a heating efficiency that exceeds the heating efficiency of the Bunsen burner type cooking stove burner and which can uniformly heat the bottom of the pot. do.

Means for Solving the Problems In order to solve the above problems, the stove burner of the present invention uses a honeycomb structure having high temperature resistance (1200°C or higher) and a high degree of porosity. A premix burner was installed directly above the mixing tube made of heat-resistant metal, and a heat-transmitting plate made of heat-resistant ceramics was installed directly above the pre-mixing burner, so that the area around the heat-transmitting plate was opened to the outside air.

According to the above-described configuration, the premixed mixture in the mixing tube is ignited directly above the premix burner, that is, on the upper surface of the honeycomb structure, and partially forms a Bunsen flame and burns the upper surface of the honeycomb structure. Heat to a high temperature of about 1000-1100°C.

The radiation generated by the red heat passes through the heat transmitting plate and is transmitted to the bottom of the pot. The portion of the pot that comes into contact with the heat-transmitting plate is also heated by heat conduction. On the other hand, the Bunsen flame formed on the upper surface of the honeycomb structure becomes a hot exhaust gas flow and is emitted from the periphery of the heat transmitting plate to the outside air while heating the bottom and the outer periphery of the pot.

In this way, in conventional ceramic burners, the surface temperature could not rise above 900°C in order to maintain the material quality, but in the stove burner according to the present invention, the temperature of the surface of the honeycomb structure could be raised to 1100°C. Since the radiation efficiency can be increased to a certain degree, it is possible to obtain higher radiation efficiency than before. Furthermore, since the exhaust gas flow can be effectively utilized, it is possible to obtain higher heating efficiency (55 to 60%)1 than before and to uniformly heat the bottom of the pot.

Embodiments Hereinafter, embodiments of the cooking stove burner of the present invention will be described with reference to the accompanying drawings.

In Fig. 1, the material directly below the mixing tube 17 made of heat-resistant metal is made of Ag2O3, TiO2, which are heat-resistant ceramics with excellent high-temperature resistance of 1200°C or more, and many other materials. There is a premix combustion disk 20 made of a honeycomb structure 19 with a porosity of approximately 7596 and having through holes 18, and directly above it a heat transmitting plate 21 made of crystallized glass with good thermal shock resistance in the shape of a trivet. It is fixed to a heat transmitting plate holder 22. On the other hand, around the outer periphery of the premix combustion disk 20, a saucer 2a made of a heat-resistant metal such as Nudenless or coated with a heat-resistant coating is installed. Further, the open end of the mixing pipe 17 faces the fuel nozzle 1V24.

Next, the operation of the above configuration will be explained.

Negative pressure is generated by the gas flow ejected from the fuel nozzle/Lz 24, and air also flows into the mixing pipe 17 at the same time, forming a premixture. The premixed gas formed in the mixing tube 17 passes through a large number of through holes 18 of the honeycomb structure 19 and reaches its north face. At that point, it is ignited by a spark already formed by a piezoelectric transformer (not shown) or the like, and a flame 25 is formed on the upper surface of the honeycomb structure 19 . The flame 25 is formed as a large number of through holes 18f and flame holes in the honeycomb structure 19, and makes a part of 1 to 5 mm from the top of the honeycomb structure red hot, and in a steady state, the red hot temperature is about 1000
~1100°C. In this state, the honeycomb structure 19
The radiation 26 generated by the high-temperature red heat on the upper surface of the pot passes directly through the heat transmitting plate 21 and reaches the bottom of the pot 27. On the other hand, the heat exhaust gas flow generated by the flame 25 is
1, and is released into the outside air from between the heat transmitting plate holding stands 220 while coming into contact with the curved portion and outer periphery of the pot 27. Also,
At the contact portion between the heat transmitting plate 21 and the bottom of the pot 27, heat is conducted to the bottom of the pot 27 by heat conduction from the heat transmitting plate 21. In this way, the convection heat due to the heat exhaust gas flow, the conduction heat due to the contact between the heat transmitting plate 21 and the pot 27, and the radiant heat due to the radiation 26 generated by the high temperature red heat of the upper surface of the honeycomb structure 19 are given to the pot 27. It turns out. In addition, since the honeycomb structure 19 has a high porosity of about 75 inches, the combustion load per surface can be increased compared to conventional ceramic combustion disks with a porosity of 5011 or less. , you can get a stove that is more compact than before. Furthermore, compared to conventional ceramic combustion discs, which had to keep the red-hot temperature below 900 degrees Celsius due to the durability of the material, it is possible to raise the temperature up to a maximum of 110 degrees Celsius, making it possible to obtain high-temperature radiation. By the way, using the stove and burner of this example, C3HB can be heated at 2000 kcae/h.
The heating efficiency measured from the time of ignition (cold start) when combustion was performed was 58 degrees.

As described above, the stove burner of this embodiment can achieve high load and high efficiency.

Effects of the Invention According to the stove burner of the present invention, the following effects can be obtained.

1. A honeycomb structure made of ceramics with high porosity and high temperature resistance is used as the combustion disk, a heat transmitting plate is installed directly next to it, and the area around the heat transmitting plate is opened to the outside air. The king of high-temperature radiant heat, conductive heat, and convection heat generated by hot exhaust gas flow can be applied to the bottom of the pot at the same time.

(2) The above structure, especially the high pore size, allows for higher loads and more compact size than conventional ceramic combustion disks.

Because it uses a honeycomb structure with high heat resistance, it is possible to raise the red-hot temperature to around 1100℃, and it has higher heating efficiency (55-60%) because it can obtain higher-temperature radiant heat than before. Conlovana got rel.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part of an embodiment of a stove burner according to the present invention, and FIGS. 2 and 3 are longitudinal cross-sectional views of main parts of a conventional stove burner. 17... Mixing tube 1, 18... Through hole,
19... Honeycomb structure, 20... Premix combustion plate, 21... Heat transmission plate. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure /7---Mudhouse sentinel/
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Claims (1)

[Claims] The premix combustion disk is composed of a honeycomb structure made of heat-resistant ceramics with many through holes and a high degree of porosity, and is connected to the mixing pipe, and a heat permeable structure is placed directly above the premix combustion disk. A stove burner with a board installed and an open area around the heat transmitting board.