JPS62142926A - Cooking burner - Google Patents

Abstract

PURPOSE:To provide a cooking burner having a high heating efficiency by a method wherein a discharging passage is arranged between an upper surface of a trivet for holding a heat transmitting plate provided with a discharging port at a central part just above a combustion plate and an upper surface of the heat transmitting plate. CONSTITUTION:A receptacle pan 12 is mounted at a central part of ceramic porous plate 11 having as its major constituent Al2O3, SiO2, Cr2O3, Fe2O3, MgO, CaO, TiO2 and ZrO2 or the like and having several flame holes 10 just above a mixing pipe 9 of a cooking burner and then a combustion plate 14 provided with a non-combustion zone 13 is installed. Above this combustion plate is held a heat transmitting plate 16 having a discharging hole 15 at its central part by a trivet 17. A space between the upper surface of the trivet 17 and the thermo-transparent plate 16 is used as a discharging passage 18. A radiation ray 4' generated by a red heat of the upper surface of a combustion chamber 14 passes through the heat transmitting plate and then is transmitted to the bottom part of a pan 5' as a radiation heat. To the bottom part of the pan 5' are added the radiation heat and a second thermal discharging flow 6'', and to an outer circumference of the pan 5' are applied a first thermal discharging as flow 6' and a second thermal discharging gas flow 6''. Thus, a heating efficiency becomes high.

Description

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

BACKGROUND OF THE INVENTION Among conventional stove burners, there is a smooth top type stove burner using a porous ceramic material. As shown in Figure 3, the combustion plate 1 of the burner is made of a ceramic porous material with a pore size of about 40 to 50 inches, and a heat transmitting plate 2 made of heat-resistant glass or the like is buried directly above it. A heated top plate 3 is installed, and the upper surface of the combustion plate 1 is made red hot by surface combustion, and the generated radiation 4f is transmitted to the bottom of the pot 5 through the heat transmitting plate 2. At the same time, the heat exhaust gas flow 6 generated is It was configured to be discharged to the outside air from the rear exhaust hole 7.

In addition, as another example, as shown in FIG. 4, a heat transmitting plate r made of heat-resistant glass or the like is placed directly above the combustion plate 1' similar to that in FIG.
It was configured to be held by 8 trivets.

Problems to be Solved by the Invention In the smooth top stove burner as shown in FIG. The conduction heat due to the contact between the heat transmitting plate 2 and the bottom of the pot 5 is transferred to the bottom of the pot 5, but the heat exhaust gas flow 6 generated by combustion is also transferred to the bottom of the pot 5.
is hardly used and is thrown away into the outside air through the rear exhaust hole 7. Therefore, although the bottom of the pot 5 is heated uniformly by the above-mentioned radiant heat and conductive heat, the overall heating efficiency is low, at around 30 to 40 inches, and when boiling water, the boiling point is low. The disadvantage was that it was slow.

On the other hand, in the stove burner shown in Fig. 4, there is no top plate 3 that prevents contact between the hot exhaust gas flow 6 and the pot 5 as shown in Fig. 3; Both the radiant heat due to the radiation 4 and the conductive heat due to the contact between the heat transmitting plate 2' and the bottom of the pot 5 are transferred to the bottom of the pot 5 as in the case of FIG. Further, since the hot exhaust gas stream 6 also rises from the outer periphery of the heat transmitting plate 2' along the curved portion and the outer periphery of the pot 5, heat exchange is performed between the hot exhaust gas stream 6 and the pot 5. However, since the hot exhaust gas flow 6 does not contact the bottom of the pot 5 at all, the heating efficiency was 45 to 5096, and as a result, no significant improvement was obtained.

The present invention solves these conventional problems and aims to provide a cooking stove burner that uniformly heats the bottom of the pot and has a high heating efficiency of 55 t% or more.

Means for Solving the Problems In order to solve the above problems, the stove burner of the present invention has a heat transmitting plate provided with an exhaust hole in the center directly above the combustion plate, which is held by a trivet, and the upper surface of the trivet and An exhaust passage is provided between the heat transmitting plate and the surface.

Operation According to the above-described structure, the premixed mixture in the mixing tube is ignited directly above the combustion plate, and the radiation generated by surface combustion is transmitted to the bottom of the pot through the heat transmitting plate. On the other hand, the heat exhaust gas flow generated by surface combustion is released from the exhaust hole in the center of the heat transmission plate to the outside air while contacting the bottom of the pan, and from the outer periphery of the heat transmission plate to the outside air along the curved part and outer periphery of the pan. Two streams of discharged flow occur. Therefore, the radiant heat generated by the red heat of the combustion disk is transmitted to the bottom of the pot.
In addition, the heat received by the heat exchange between the hot exhaust gas flowing from the exhaust hole of the heat transmitting plate to the bottom of the pot and the bottom of the pot is added, and a higher heating efficiency (55 to 60%) than before can be obtained.

Example Embodiments of the present invention will be described above with reference to the accompanying drawings.

(Example 1) In FIG. 1, directly above the mixing tube 9 made of heat-resistant metal, Ag2O3, SiO2, Cr2O3, Fe203f:
Ceramic porous plate 1 having a large number of flame holes 1o as a main component
A first saucer 12 made of a heat-resistant metal such as stainless steel or a heat-resistant coating is installed in the center of the non-combustion zone 1.
A combustion plate 14 is installed on one side thereof, and a heat transmitting plate 16 made of crystallized glass or the like having excellent thermal shock resistance and having an exhaust hole 15 in the center is held on one side by a trivet 17.

The space between the end surface of the trivet 17 and the heat transmitting plate 16 serves as an exhaust passage 18. On the other hand, around the outer periphery of the combustion disk 14, a second saucer 19 made of a heat-resistant metal such as stainless steel or a heat-resistant coating is installed. Above combustion plate 1
At the open end of the mixing tube 9 surrounding the lower part of the fuel nozzle/l
/20 is coming.

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

Negative pressure is generated by the Ganu flow ejected from the fuel nozzle/L'20, and air also flows into the mixing pipe 9 at the same time, forming a premixture. The premixture formed in the mixing tube 9 passes through a large number of flame holes 10 in the ceramic porous plate 11 and reaches the upper surface of the combustion disk 14 . At that point already a piezoelectric transformer (not shown)
It is ignited by the sparks formed by the above, and surface combustion starts on the upper surface of the combustion disk 14, and when the upper surface becomes red-hot and reaches a steady state, the temperature reaches a high temperature of about 900°C. 1. Radiation 4' generated by red heat on the bottom surface of the combustion plate 14 is transmitted to the heat transmitting plate 16 directly above.
and is transmitted to the bottom of the pot 5' as radiant heat. On the other hand, the heat exhaust gas flow generated by the surface combustion on the combustion plate 14 flows from the outer periphery of the heat transmission plate 16 to the first heat exhaust gas flow 6' flowing along the curved part and the outer periphery of the pot 5', and the heat transmission plate 16. Exhaust hole 1
5 through the exhaust passage 18 along the bottom of the pan 5'.
Divided into the hot exhaust gas stream. Therefore, the bottom of the pot 5' receives the heat obtained by the radiant heat and the heat exchange between the second hot exhaust gas stream C and the bottom of the pot 5', while the bottom of the pot 5'
The outer circumference of the pan 5' is subjected to the heat obtained by the heat exchange between the first hot exhaust gas stream 6' and the second hot exhaust gas stream C and the outer circumference of the pan 5'. Therefore, the heating efficiency is also high, and when the heating efficiency according to JIS at C3HB and 2000 kca e/h was measured using the stove burner of Example 1, it was 56 to 57.
Obtained a value of many.

(Example 2) In FIG. 2, the combustion disk 14 has 9 honeycomb flame holes 21 made of Ae2O3 and TiO2, and has a pore size of 75.
The ceramic porous plate 22VCJ has a high porosity of about 1% and has a heat resistance of 1200°C or higher. The other configurations are the same as in the first embodiment.

Next, the operation in the first configuration will be explained.

Combustion plate 14' contains a premixture in which the amount of air sucked into mixing tube 9 by the gas flow ejected from fuel nozzle 20 is suppressed to approximately 90 to 95% of the theoretical combustion air amount using a damper (not shown) or the like. When ignited directly above, a Bunsen flame 23 is formed near the honeycomb flame hole 21. In steady state,
A portion at a depth of 1 to 1.5 mm from one side of the combustion disk 14' exhibits a high-temperature red-hot state of 1000 to 1100°C. Here, when the above-mentioned amount of air was supplied at 100 to 105 inches or more of the theoretical combustion air amount, the red-hot state on the bottom surface of the combustion plate 14' spread to the entire area, and the temperature exceeded 1100'C. In order to avoid backfires, the above air volume control is required. The upper surface of the combustion disk 14' is 1000 to 110
The high-temperature radiation 4' passes through the heat transmitting plate 16 and reaches the bottom of the pot 5' while maintaining red heat at 0°C. On the other hand, the heat exhaust gas flow from the Bunsen flame 23 formed on the upper surface is the first heat that escapes from the outer periphery of the heat transmitting plate 16 to the outside air while contacting the curved part and outer periphery of the pot 5', as in the case of the first embodiment. The exhaust gas flow 6' and the central exhaust hole 15 of the heat transmitting plate 16 are connected to the pan 5'.
A second hot exhaust gas stream C escapes to the outside air while contacting the bottom of the
Divided into. At this time, since the Bunsen flame 23 has a longer flame length than the surface combustion case of Example 1,
At the distance between the lower surface of the heat transmitting plate 16 and the upper surface of the combustion disk 14' (hereinafter referred to as H), the tip of the Bunsen flame 23 comes into contact with the lower surface of the heat transmitting plate 16 and is cooled, resulting in a decrease in the amount of CO generated. increases.

Therefore, H is necessarily 11.3 compared to the case of Example 1.
It is necessary to increase the size by ~1.5 times, resulting in the heating effect of the high temperature radiation 4' and the natural cooling effect due to the increase in H of the first hot exhaust gas flow and the second hot exhaust gas flow C. When the heating efficiency was experimentally measured in the same manner as in Example 1, it was found to be 57 to 58φ, which is almost the same value as in Example 1. Therefore, in the cases of Example 1 and Example 2, the same heating effect of the pot 5' can be obtained. On the other hand, in any of the embodiments, regarding the non-combustion zone 13 in the center of the combustion disk 14, 14',
Since there is a possibility that spilled boiled water from the pan 5' during heating may drip to the lower part of the heat transmitting plate 16 through the exhaust hole 15, a thermal zone may be formed directly under the exhaust hole 15. , a non-combustion zone 13 such as the first saucer 12 was inevitably provided.

According to the invention effect tree fUJA's Conlovana, the effects listed below can be obtained.

■ By installing a heat transmission plate with an exhaust hole in the center directly above the combustion plate, which is made of a ceramic porous plate with many flame holes, heat is transmitted through the hot exhaust gas flow generated by combustion on the combustion plate. The flow can be shunted both to the outer periphery of the plate and to the central exhaust hole.

■ By providing an exhaust passage between the north face of the trivet that holds the heat transmission plate and the first side of the heat transmission plate, a second heat exhaust gas flow that comes around from the exhaust hole in the center of the heat transmission plate to the exhaust passage. Heat exchange 2 can be performed between the and the bottom of the pot.

With the above configuration, the bottom of the pot receives radiant heat from the radiation that passes through the heat transmission plate, and heat from the second heat exhaust gas flow that contacts the bottom of the pot along the exhaust passage from the exhaust port in the center of the heat transmission plate. The curved part and the outer periphery of the pot receive heat from the first hot exhaust gas flow rising from the outer periphery of the heat transmitting plate.
A stove burner with high heating efficiency (55-6oφ) is obtained.

[Brief explanation of drawings]

Figures 1 and 2 are longitudinal sectional views of main parts of Example 1 and Example 2 of the stove burner according to the present invention, respectively, and Figures 3 and 4 are respectively one example of the conventional stove burner and another example. It is a longitudinal cross-sectional view of the main part. 10.21... flame hole, 11.22...
Ceramic perforated plate, 14.14'... combustion plate,
15...Exhaust hole, 16...Heat transmission plate,
17... Trivet, 1B... Exhaust passage. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
figure

Claims (2)

[Claims] (1) A heat transmitting plate with an exhaust hole in the center is held directly above a combustion plate made of a ceramic porous plate with many flame holes via a trivet, and between the top surface of the trivet and the top surface of the heat transmitting plate. Stove burner with an exhaust passage. (2) Al_2O_3 as a material for ceramic porous plate
, SiO_2, Cr_2O_3, Fe_2O_3, Mg
The stove burner according to claim 1, which uses an oxide that is a combination of one or more of O, CaO, TiO_2, ZrO_2, etc.