JPS618511A - Gas cooking apparatus - Google Patents

Abstract

PURPOSE:To improve a use condition of a gas cooking apparatus with combustion without the generation of carbon monoxide and the enlargement of adjusting range by the provision of the ventilation body of the infrared ray permeable material on the burner plate body consist of a heat resist ceramic material or the like, and providing the indenpendently communicating double burner at the sub-flame opening disposing at approximately the center of the plate body and a main flame opening disposed at an outside periphery region thereof. CONSTITUTION:Gas flown out from a nozzle 19 is surface burned under the suction of a surrounding air, and being mixed and equalizing the pressure sufficiently in a main mixing pipe 8 and burner case, and being burned under the supply of a secondary air from the inner periphery section of a partition cylinder 18 and sub-flame opening 5. Gas flown out from a sub-nozzle 20 is surface burned after mixed and equalizing a pressure in a sub-mixing pipe 9 and a rising pipe 10, supplied sufficient air from the sub-flame opening 5, and burned perfectly on a single plate body 4 together. In the case of ''weak'' combustion the fuel is burned only on the sub-flame opening 5, ''medium'' combustion only on the main flame opening 6 and ''strong'' combustion on the main-and-subflame-opening 5, 6 at the same time. A burned exhaust gas is flown in a direction of an arrow 23 and reduced its exhaust resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a domestic gas cooker with high thermal efficiency, clean combustion and enhanced calorie control.

Conventional structure and its problems Conventionally, as shown in Japanese Utility Model Application No. 56-75602, an integral cover 2 is provided above the infrared burner 1 and is made of a heat-resistant material that transmits infrared rays. At times, a combustion device has been proposed as a gas cooker that guides combustion gas together with infrared rays through a gap in the outer circumferential area of the burner to the outer circumferential area of the bottom of the pot as shown by arrow 3. Disadvantages of this combustion device include (1) thermal efficiency is low because the combustion gas heats the outer peripheral area of the bottom of the pot intensively; Particularly when using a small-diameter pot, the thermal efficiency is significantly reduced.

(2) Due to natural suction combustion using a mixing tube on a single combustion surface such as a wire mesh, when the combustion amount is varied, the excess air ratio becomes inappropriate, resulting in the generation of sea oxide carbon that causes flashback, etc. The range of variable amount was narrow.

(3) Due to the structure that detours the combustion gas as shown by arrow 3,
As the exhaust resistance increases, the amount of primary air becomes insufficient, and as mentioned above, there are problems such as deterioration of combustibility and material deterioration due to heating of red-hot bodies such as wire mesh to high temperatures (for example, 900° C. or higher).

OBJECT OF THE INVENTION The present invention solves these conventional problems, and provides clean combustion in home cooking appliances that does not generate carbon monoxide.
The purpose is to improve usability by expanding during calorie adjustment.

Structure of the Invention The present invention provides an exhaust body made of an infrared transmitting material on a burner plate body made of heat-resistant ceramic or the like, and a sub-flame hole is provided approximately in the center of the plate body, and a main flame hole is provided in the outer peripheral area of the burner plate body. , a parent-child burner is constructed that communicates independently with the sub-flame hole and the main flame hole.

This configuration allows you to adjust the combustion amount (for example, "strong", "medium",
[Weak J) By switching combustion between the auxiliary flame hole and the main flame hole, we aim for clean combustion without carbon oxide, and
Allows for a wide range of calorie adjustments.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

Reference numeral 4 denotes a burner plate body mainly composed of aluminum and silica, which has a sub-flame hole 5 approximately in the center and a main flame hole 6 in its outer peripheral area. 7 is a burner case, and a burner plate body 4 is provided at the upper opening step, and a main mixing pipe 8 is provided at the side of the burner case 7.
It is open inside.

Reference numeral 9 denotes a sub-mixing pipe, one end of which communicates with the sub-flame hole 5 via a riser pipe 10. Reference numeral 11 denotes an exhaust body disposed above the burner plate body 4 and made of an infrared transmitting material, which is composed of an opening 12 provided in the center, a raised piece 13, and a surrounding edge portion 14. Ru. Reference numeral 15 denotes a removably provided lid body made of the same material as the exhaust body 11. 16 is a combustion chamber,
17 is a gap for discharging exhaust gas radially, 18 is a partition tube, 19 is a main nozzle, 20 is a sub nozzle, 21 is a pot body, 22 is a pot body, 23 is a flow of combustion exhaust gas, 24 is a flow of boiling liquid In the state, 25 is a saucer for the broth.

In the above configuration, the combustion process of the main burner is performed through the nozzle/l'
The gas ejected from 19n> sucks the surrounding air as primary air, mixes in the main mixing pipe 8, and then enters the burner case 7.

The mixed gas, which has been thoroughly mixed and pressure-equalized in the burner case 7, is ejected from the main flame hole 6, and when ignited by an ignition means (not shown), surface combustion occurs on the surface of the main flame hole 6. conduct. Furthermore, secondary air is supplied through the inner circumference of the partition tube 18 and the auxiliary flame hole 5 of the auxiliary burner to achieve complete combustion. At this time, the surface of the main flame hole 6 becomes red hot to a high temperature (for example, 900 to 1000°C), and the pot body 2
While the infrared rays are emitted toward the bottom of the pan 4, the high-temperature combustion gas is focused at the opening 12 of the exhaust body 11 as shown by the arrow 23, and then obtains effective thermal contact along the heating surface of the pan body 22. Exhausted radially.

Next, in the combustion process of the auxiliary burner, the gas ejected from the auxiliary nozzle 20 is mixed and pressure-equalized in the auxiliary mixing pipe 9 and the riser pipe 10, as in the case of the main burner, and then the combustion process is completed at the auxiliary flame hole 5. Secondary air is obtained to perform surface combustion, and the upper surface of the auxiliary flame hole 5 is red-hot to a high temperature. The combustion gas in the auxiliary flame hole 5 rises in the center of the combustion chamber 16 and is exhausted below the lid 15 along the bottom of the pot in a radial flow.

Note that calorie adjustment is performed by switching between the main burner and the auxiliary burner, and although the gas flow switching mechanism is not specifically shown,
The combustion mode is as follows.

That is, in the case of "weak" combustion, only the auxiliary flame hole 5 in the center of the burner plate body 4 is burned, and the
Used for simmering small calorie burners of K cal/h. In the case of "medium" combustion, only the main flame hole 6 is burned (for example, 2000 Kcal/h 'I, which corresponds to medium heat heating, and in the case of "strong" combustion, the auxiliary flame hole 5 and the auxiliary flame hole of the main flame hole 6 are burned. High flame heating is possible by burning both at the same time.

In this way, the single burner plate body 4 is divided into the main flame hole 6 and the auxiliary flame hole 5, and by performing independent combustion in the auxiliary flame hole and switching combustion by the mixing mechanism, it can be used for various cooking heating purposes. On the other hand, it is easy to adjust the calorie content from low heat to high heat, which improves usability.

In addition, strong infrared radiation is transmitted through the infrared transmitting material of the exhaust body 11 and the lid 15, and the high-temperature combustion gas concentrated in the center of the exhaust body 11 forms a radial flow along the bottom of the pot as shown by arrow 23. , a high degree of thermal efficiency can be achieved by promoting convective heat transfer. In addition, since a lid is provided below the center of the bottom of the pot, the high-temperature combustion gas does not intensively heat the center of the bottom of the pot, thereby preventing food from burning.

Furthermore, calorie adjustment is done by switching between the main burner and the auxiliary burner, instead of using a single burner as in conventional examples.
In addition, by forming a natural upward flow of combustion exhaust gas as shown by arrow 23 and reducing exhaust resistance, sufficient primary and secondary air λ can be supplied and the amount of combustion per unit area in the flame hole can be increased. While keeping the load constant, the combustion chamber 1
By keeping the inside of 6 at a high temperature, it is possible to ensure clean combustion without generating carbon monoxide and to expand the period during calorie adjustment over the entire calorie adjustment range of "weak,""medium," and "strong."

Effect of the invention According to the present invention, the following effects can be obtained.

(1) Clean combustion without generation of carbon monoxide can be obtained over the entire calorie adjustment range.

(2) It is possible to provide a gas cooker that allows easy calorie adjustment and is easy to use with a wide range of calorie adjustment 1].

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the entire conventional gas cooker, FIG. 2 is a sectional view showing one embodiment of the gas cooker of the present invention, and FIG.
It is a sectional view taken along the line A-A' in the figure. 4... Burner plate body, 5... Sub-flame hole, 6... Main flame hole, 7... Burner case, 8
...Main mixing pipe, 9...Sub mixing pipe, 11
...exhaust body. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (2)

[Claims] (1) A bottomed cylindrical burner case with an open upper part, a burner plate body made of heat-resistant ceramic and having numerous flame holes provided at the top of the burner case, and a burner plate body made of heat-resistant ceramic, approximately at the center of the burner plate body. A gas cooker consisting of a parent-child burner, in which a main flame hole is provided in the outer peripheral area of the secondary flame hole, and the secondary flame hole and the main flame hole communicate independently with a sub-mixing pipe and a main mixing pipe, respectively. (2) The gas cooker according to claim 1, wherein an exhaust body made of an infrared transmitting material is disposed with a gap above the burner plate body.