JPH0337086B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a stove burner used in homes and the like.

Conventional configurations and their problems Recently, flame blowout safety devices using thermocouples and electromagnetic valves have been incorporated and used in gas stoves. As shown in Figure 1, a thermocouple 2 is placed close to a part of the main flame hole 1 provided on the outer periphery of the stove burner to thermally detect the presence or absence of flame and close the gas circuit. It is highly safe against gas release. However, in the current system, the range in which the stove can be used is determined by the safety of the flame in the main flame hole 1. In other words, stoves are generally used with a wide combustion range, and a standard one is around 2200 to 400 Kcal/H (1/
It is actually used at an aperture of 5 to 1/6). However, when a thermocouple safety valve is used, in order for the flame to effectively heat the thermocouple to a temperature that maintains the magnetomotive force of the solenoid valve, a large minimum amount of heat must be set, for example, 2200 to 600 Kcal/H. This is due to the fact that the length of the flame changes depending on the amount of combustion, and furthermore, it is necessary to have a restricted combustion amount that allows stable thermocouple heating due to slight wind, dimensional variations, flame changes, etc. Therefore, many complaints have arisen that the convenience of conventional devices has been lost due to the addition of safety devices. Also, the minimum aperture from the perspective of cooking is
Approximately 200Kcal/H is required, but we cannot answer this at present.

OBJECTS OF THE INVENTION The present invention addresses the above-mentioned problems and provides a stove burner equipped with a blowout safety device having a stable and wide throttle area.

Structure of the Invention The present invention constantly forms a pilot flame in a part of the burner flame hole by providing a pilot flame gas supply pipe from a gas circuit different from the main gas circuit in the burner flame hole passage. The detection section of the flame detection device is provided opposite to the flame hole (flame hole passage exit) section where the seed flame is formed.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2, 3, and 4.

A is a stove burner, which is composed of a burner body 4 having a mixing pipe 3, and a burner cap 7 having a large number of teeth 6, which is removably attached to the upper surface 5 opening of the burner body 4, and the teeth 6 and the body are connected to each other. The space formed by the upper surface 5 is used as a flame hole passage 8, and the upstream side is opened inside the burner body 4, and the downstream side is configured as a flame hole passageway 9, with the flame hole passage outlet. Reference numeral 10 denotes a main nozzle attached to the mixing pipe 3, which is connected to a tank 12 via a main gas supply pipe 11.

13 is a pilot gas supply pipe whose tip is connected to the flame hole passage 8 from the through hole 15 in the peripheral interior 14 of the burner body 4.
It is disposed so as to protrude inward and be inserted into a hole groove 16 provided in a part of the teeth 6 of the burner cap 7. The broken line in FIG. 4 is the insertion position. In addition, in this example, the tip of the supply pipe 13 is opened widely on the flame hole 9 side,
Moreover, by placing the flame hole passage 8 close to the ceiling, the flow resistance toward the upstream side of the flame hole passage is made larger than that on the flame hole side (FIG. 3). Reference numeral 17 denotes a pilot nozzle for supplying mixed gas to the pilot gas supply pipe 13, which communicates with an auxiliary gas supply pipe 18 and is connected to the cockpit 12.

Reference numeral B designates a flame detection device serving as a safety device for extinguishing the flame, and includes a thermocouple 19 and a thermocouple 19 disposed near the flame hole 9' forming the outlet of the flame hole passage 8 through which the pilot gas supply pipe 13 is exposed. , and a solenoid valve 20 that receives the electromotive force of the thermocouple 19 and opens a gas circuit. 21 is a main flame formed in the flame hole 9, and 22 is a seed flame formed in the flame hole 9'.

In addition, when the opening operation is performed, the solenoid valve is forcibly opened and the main gas supply pipe 11 and the auxiliary gas supply pipe 1 are opened.
8, and when the throttle is operated, the fuel supply to the main gas supply pipe 11 is restricted, and a constant amount of fuel is supplied to the auxiliary gas supply pipe 18. This means is a known method. That's fine.

With the above configuration, when the Kotoku 12 is used, the solenoid valve 20 is forcibly opened and the fuel is transferred to the main nozzle 1.
0, the pilot flame nozzle 17 is supplied to the mixing pipe 3 and the pilot gas supply pipe 13, respectively, and the former has a large number of flame holes 9.
The latter is ejected from the desired flame hole 9' by the pilot gas supply pipe 13 and ignited. The thermocouple 19 is heated by the pilot flame formed in the flame hole 9', generates an electromotive force, and automatically holds the solenoid valve open. At this time, when the throttle operation is performed, the main flame 21 becomes smaller in accordance with the amount of combustion, and the amount of heat is adjusted. However, the pilot flame 22 is always constant during operation, and in this example, two pilot flames 22 are formed to heat the thermocouple. Therefore, the pilot flame can be held stably regardless of the aperture. Incidentally, this seed flame 22 can form a flame of about 100 to 200 Kcal/H, and in terms of appearance, it is sufficient to leave one to three conventional main flame holes and change the amount of heat by using other flame holes. For example, if the pilot flame is set to 200Kcal/H, a conventional burner with 2200Kcal/H specifications will produce 2000~
The adjustment width (1/5) is set at 400Kcal/H, and below this, the main flame is extinguished and the starter flame can be used only for heat retention or simmering at 200Kcal/H. When the flame is extinguished, the solenoid valve is de-energized, the gas circuit is closed, and safety is maintained.

Effects of the Invention As described above, by using the stove burner of the present invention, () a stable thermoelectromotive force can be obtained at all times, and safety is ensured regardless of changes in the aperture.

() It has a wide aperture range and can provide the amount of heat that satisfies the requirements with the minimum aperture.

As described above in the explanation of the operation, the present invention provides a safe device that allows setting of a small minimum aperture amount without sacrificing the convenience of the conventional device.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main part of a conventional stove burner, Figure 2
The figure is a sectional view of a stove burner showing an embodiment of the present invention, FIG. 3 is a partial side view of the same, and FIG. 4 is a partial bottom view of the same burner cap. 4... Burner body, 5... Upper surface of burner body, 6... Teeth, 7... Burner cap, 8...
Flame hole passage, 9, 9'... Flame hole, 11... Main gas supply pipe, 13... Gas supply pipe for pilot flame, 18... Auxiliary gas supply pipe, A... Stove burner, B... Flame detection Device.

Claims (1)

[Scope of Claims] 1. A burner cap having a large number of teeth is removably attached to the upper opening of the burner body, and the burner body and burner cap teeth form a large number of flame holes on the outer periphery. A pilot gas supply pipe connected to an auxiliary gas supply pipe that is separate from the main gas supply pipe that is supplied to the many flame holes is provided in the flame hole passage formed by the upper surface of the burner body and the upper surface of the burner body. A stove burner that is equipped with a flame detection device opposite the outlet of the flame hole passage where the gas supply pipe is exposed. 2. The stove burner according to claim 1, wherein the pilot gas supply pipe is inserted into the flame hole passage.