JPS62102034A - Gas cooking stove - Google Patents

Abstract

PURPOSE:To improve the efficiencies of combustion performance and heating performance and the temperature responsing ability by covering a gas burner in which flame holes are successively opened on the inner circumference of a central opening with a kettle holding plate which has a small opening section and encircling a temperature sensor with a double- walled heat shielding cylinder and providing a gap between the central opening of the burner and the small opening of the kettle holding plate. CONSTITUTION:A doughnut shaped gas burner 10 has many flame holes 12 arranged along the inner circumferential edge of a central opening 11 of the gas burner 10. A kettle holding plate 16 has an opening 17 which has a diameter slightly smaller than that of the central opening 11 of the gas burner 10 and is located opposite to the opening 11, and the kettle holding plate 16 is removably mounted on a ceiling plate 19 to cover the gas burner. A temperature sensor 21 contacts the outer bottom face of a heating vessel 22 and detects its temperature. Signals from the temperature sensor 21 regulate the amount of the gas supplied to the gas burner 10 and also stop the gas supply. A receiving pan 26 which receives boiling-over liquids has a double-walled heat shielding cylinder 27 which projects upward as one body from the central portion and encircles the temperature sensor 21 and, further, has an air passage hole 29 above an outer heat shielding 27a which keeps a gap 28 for passing flame between the central opening 11 of the gas burner 10 and the opening 17 of the kettle holding plate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gas stove having a heat shield cylinder that improves the thermal response of a temperature sensor provided to detect the temperature of the outer bottom surface of a heating container. .

2. Description of the Related Art A conventional gas stove of this type was constructed as shown in FIG. That is, the temperature sensor 3 used to detect the temperature of the outer bottom surface of the heating container 6 is located at the center of the gas burner 2, and a cylindrical heat shielding tube 4 is provided at the top of the gas burner 2 so as to surround the temperature sensor 3. . Furthermore, the performance of the temperature sensor 3 varies greatly depending on its position relative to the burner flame. That is, if it is directly heated by the flame A, the temperature of the outer bottom surface of the heating container 6 cannot be detected correctly, so the gas burner 2
The flame opening 2a is only a tooth-shaped flame opening on the outer periphery. In the figure, 1 is the fuel injection nozzle of the gas burner 2, 6 is the trivet, 7 is the soup saucer, and 8 is the top plate of the stove.

The operation of the gas stove configured as described above will be explained below.

First, gas ejected from the nozzle 1 is mixed with primary air in the mixing pipe section of the gas burner 2, and combusted at the flame port 2a.

The temperature sensor 3 detects the temperature of the outer bottom surface of the heating container 6 placed on the trivet 5, transmits this signal to the electric circuit, adjusts the amount of gas ejected from the nozzle 1, and adjusts the amount of gas to be heated in the heating container 6. Control firepower, etc. depending on the object. Further, the heat shield tube 4 provided on the upper part of the gas burner 2 is for insulating and protecting the temperature sensor 3 from the flame A of the gas burner 2.

Problems to be Solved by the Invention However, in the above configuration, as shown in FIG. 3, during cooking, the flame A of the gas burner 2 is directed outward due to the relationship with the temperature sensor 3 described above. It overflowed from the outer periphery of the heating container 6, which was uneconomical and caused uneven heating. Further, regarding the performance of the temperature sensor 3, there was a problem in that the influence of the flame A varied greatly depending on the heating power, so there was a large variation in temperature performance.

In view of the above problems, the present invention aims to improve the combustion and heating performance of a gas stove, and provides a gas stove that has a temperature sensor with good temperature responsiveness.

Means for Solving the Problems In order to solve the above problems, the gas stove of the present invention has a donut-shaped gas burner with a large number of flame holes arranged in rows along the inner peripheral edge of its central opening. A trivet plate that covers the gas burner and has an opening slightly smaller in diameter than the central opening is disposed above the gas burner, and a flame passage is provided between the central opening and the central opening of the gas burner. It has double heat shield cylinders that surround the temperature sensor that detects the temperature of the outer bottom surface of the heating container, and has air circulation holes formed in the upper part of the outer heat shield cylinder. be.

Effect of the Invention With the above-described configuration, the flame hole of the gas burner faces inward, and the flame is spread outward by the secondary air passing through the air circulation hole provided in the outer heat shield cylinder, so that the flame is not blown. The bottom of the heating container is heated evenly from the center to the outer circumference, resulting in highly efficient heating with little uneven heating, and since the flame opening is hidden by the trivet plate, it is resistant to boiling over. In addition, the temperature response is good because the temperature sensor is double-insulated and the heat shield tube is cooled by the secondary air flow JL passing through the air circulation hole.

EXAMPLE An example of the present invention will be described below with reference to the drawings. 1st
In the figures, 9 is a nozzle for ejecting gas, and 1o is a donut-shaped gas burner, which has a large number of flame holes 12 and mixing tubes 13 arranged in rows along the inner peripheral edge of the central opening 11. This gas burner 1o has the entire part of the flame hole 12 facing upward so that the flame hole 12 is formed inwardly and upwardly, and is slightly smaller than the diameter of the center opening 11, and is bent downward. A trivet plate is provided with an opening 17 having a rounded edge 16a and claws 18 consisting of protrusions arranged radially at four locations on the upper surface, and is gradually inclined lower toward the opening 17. On top plate 19, gas burner 1o
The gas burner 1o is covered and detachably mounted at a constant interval 20. A temperature sensor 21 detects the temperature of the heating container 22 by being in contact with the outer bottom surface of the heating container 22 placed on the claw 18, and stops the gas flow rate and gas supply to the gas burner 10 in response to a signal of the detected temperature. Reference numeral 23 denotes an umbrella-shaped rectifying plate disposed below the upwardly inclined gas burner with an interval 24 of 1°, and is arranged below the substrate 16.
It has an air inflow hole 26 on the outer circumferential side integrally formed with the air inflow hole 26 . 2
Reference numeral 6 designates a juice pan having a slightly larger outer diameter than the opening 17 of the trivet plate 16 and detachably attached to the inner peripheral end of the rectifying plate 23. The juice tray 26 has a double heat shielding tube 27 that integrally projects upward from the center and surrounds the temperature sensor 21.
It further has a central opening 11° of the gas burner 1o and a trivet plate 1.
The outer heat shield cylinder 27a maintains a flame passage gap 28 between the outer heat shield cylinder 27a and the opening 17 of the outer heat shield cylinder 27a (the upper part of the opening 17). In addition, the inner heat shield tube 27b7 of the heat shield tube 27 is integrally folded back from the upper end of the outer heat shield tube 27a and hangs downward to maintain a gap 30.31 between the outer heat shield tube 27a and the temperature sensor 21. .

In the above embodiment, when gas is ejected from the nozzle 9,
The ejector action of the ejected gas draws primary air into the mixing tube 13, where it is mixed with the previous gas. and,
This mixed gas is ejected from the flame hole 12 of the gas burner 1o and burned. This burned flame B is generated as shown in FIG.

At this time, the secondary air necessary for combustion flows through the gaps 20 and 24 formed by the trivet plate 16 on the upper side of the gas burner 1o and the rectifier plate 23 on the lower side from the outer circumferential direction near the flame port 12. It flows as shown by the arrow and is supplied in the amount required for combustion. On the other hand, the temperature sensor 21 that detects the temperature of the outer bottom surface of the heating container 22 is protected from the flame B by a double heat shield tube 27 provided in a juice pan 26 installed below the central opening 11 of the gas burner 10.・Heat shielded. Further, the secondary air supplied from the central opening 11 of the gas burner 10 is drawn from below the stove body 14, as shown by the arrow in FIG. 31) and is supplied to flame B while cooling the temperature sensor,
The other side passes through the gap 30 between the inner and outer heat shield tubes 27a and 27b, and is supplied to the flame B from the air circulation holes 29 provided in the outer heat shield tube 27a, and these cool the heat shield tube 27 and In particular, the secondary air that passes through the 3° gap and blows out from the air circulation hole 29 spreads the flame B to the outer periphery and prevents the temperature sensor 21 from being affected by heat.

Further, when the soup tray 26 becomes dirty with juice, the trivet plate 1θ can be removed, and the soup tray 26 can be easily removed using the heat shield cylinder 27 and cleaned. In addition, trivet plate 16. Soup saucer 2
6 may be integrated, in which case the opening through which flame B passes,
The trivet plate 16 and the saucepan 26 are connected and provided on the side facing the flame hole 12.

Effects of the Invention As described above, the present invention has a large number of flame holes arranged along the inner peripheral edge of the central opening of a gas burner, covers this gas burner with a trivet plate, and faces the central opening, and from this central opening,
An opening with a slightly small diameter is formed in the trivet plate, and a temperature sensor for detecting the temperature of the outer bottom surface of the heating container is surrounded by a double heat shield cylinder, and a gap is formed between the central opening and the opening. In addition, since the gas burner is provided with air circulation holes at the top of the outer heat shield cylinder, the gas burner is protected from dripping of broth due to the trivet plate, and furthermore, the flame of the gas burner flows through the gap. The flame is spread from the center to the outer periphery by the action of the secondary air passing through the air circulation holes, so the flame is spread evenly from the center to the outer periphery of the outer bottom of the heating container. Can be heated. Furthermore, due to secondary air passing through the air circulation holes,
Since the double heat shield cylinder is cooled, the temperature sensor can be protected more than the original effect of the heat shield cylinder, and the accuracy of detected temperature can be further improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a gas stove according to an embodiment of the present invention, Fig. 2 is a plan view of a main part of the curved gas stove according to an embodiment of the present invention, and Fig. 3 is a conventional gas stove. FIG. 10... Gas burner, 11... Center opening, 12... Flame hole, 16... Trivet plate, 1
7...Opening, 27...Heat shield tube, 27
a...Outer heat shield tube, 27b...Inner heat shield tube, 29...Air circulation hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
figure

Claims (1)

[Claims] A temperature sensor for detecting the temperature of the outer bottom surface of the heating container, a donut-shaped gas burner with a number of flame holes arranged along the inner peripheral edge of the central opening facing the temperature sensor, and a donut-shaped gas burner facing the central opening of the gas burner. , a trivet plate disposed on the gas burner having an opening slightly smaller in diameter than the central opening, and penetrating through the central opening of the gas burner and the opening of the trivet plate;
and a double heat shield cylinder surrounding the temperature sensor with a gap between the central opening and the opening, and an air circulation hole provided in the upper part of the outer heat shield cylinder of the heat shield cylinder. reactor.