JPH0740843Y2 - Gas burner thermocouple heating structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermocouple heating structure in a gas burner such as a stove burner.

[Conventional technology]

In gas combustion equipment such as a gas table, an electromagnetic safety valve is incorporated as a safety measure to prevent raw gas from flowing out at the time of ignition, but the thermocouple that opens and closes the electromagnetic safety valve does not generate heat at ignition. Since it is important that the electric power rises quickly and that the thermoelectromotive force is stable even when the capacity is reduced (for example, during a simmer), it is especially important for a gas burner that heats a thermocouple in a part of the main flame hole. The important point is the relationship between the thermocouple and the flame hole for heating the thermocouple. However, as illustrated in FIG. 5 as a conventional technique, a thermocouple TC is installed with its hot junction facing the center of a flame a ′ formed in a thermocouple heating flame hole 2 ′. ing.

In addition, in the gas appliance with the extinguishing safety device of No. 1-61549, a plurality of flame holes having different flame hole areas of at least two kinds of sizes are provided in the secondary pilot burner, and the flame holes are appropriately located between the flame holes. A thermocouple is attached.

[Problems to be Solved by the Invention] In the former case of the above conventional technique, if the thermocouple TC is provided at a position close to the flame hole, the temperature of the flame a'is low when the input of normal combustion is large. Since the hot junction of the thermocouple TC enters the inner flame and the amount of heating decreases, the rise of thermoelectromotive force is significantly delayed.If the TC position is set away from the flame hole, for example There is a problem that the thermoelectromotive force generated in the thermocouple is not stable, for example, the thermoelectromotive force is lowered due to insufficient heating when the input is small (capacity is small) like combustion.

In the latter extinguishing safety device, the tip of the thermocouple is located in front of the small flame hole.With this configuration, when the gas input capacity is low, the external flame of the flame of the large flame hole does not reach and insufficient heating occurs. , The thermoelectromotive force decreases, and when the capacity is high, the thermocouple tip part enters the inner flame of the flame of a small flame with a low temperature of the flame, and the heating amount decreases. There is a problem of being late.

The present invention has been made in view of such problems of the conventional technology,
A large flame and a small flame are formed in a state of sandwiching the thermocouple in a cross shape in two thermocouple heating flame holes having different flame mouth areas, and when the input of the gas burner is large, it is an external flame of a small flame, and By ensuring that the thermocouple is heated by the external flame of a large flame when the input is small, the heating amount of the thermocouple is not affected by the size of the input and is always constant and stable. It is an object of the present invention to provide a thermocouple heating structure for a gas burner that can obtain thermoelectromotive force.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the thermocouple heating structure of the gas burner of the present invention is a gas burner that heats a thermocouple with a part of the main flame hole. The thermocouple is set at the intersection of the large flame and the small flame of the flame formed in the flame hole so that the thermocouple can be heated by the flame regardless of the input of the gas burner. It is characterized by having done.

[Action]

In the invention of the thermocouple heating structure of the gas burner configured as described above, a large flame and a small flame formed in two thermocouple heating flame holes having different flame opening areas intersect each other to form a thermocouple. When the gas burner input is large, the thermocouple is heated by the outer flame with a small flame and high temperature, and when the input of the gas burner is large, the thermocouple is heated by the outer flame with a large flame and high temperature. Moreover, the thermocouple is always heated at a constant temperature regardless of the size of the input.

〔Example〕

An embodiment of a thermocouple heating structure of a gas burner according to the present invention will be described below with reference to the drawings.

In the embodiment shown in FIGS. 1 to 3, the thermocouple heating structure of the present invention is applied to a stove burner, and a burner body 5 integrally formed at the tip of a mixing tube 4 has a burner cap 6 attached thereto. In a stove burner that is detachably provided with a plurality of slit-shaped flame mouth grooves 8 formed in the peripheral edge of the lower surface of the burner cap 6 on the annular smooth surface 7 formed in the peripheral edge of the upper surface of the burner body 5. The main flame holes 1 are radially formed on the outer peripheral edge between the burner body 5 and the burner cap 6 by placing the main flame holes 5 in a radial manner, and a part of the main flame holes 1 is omitted, and the main flame holes 1 are provided at the opposite positions of the side walls 10 and 11. 2 with different flame mouth areas
Two thermocouple heating flames, ie a large diameter flamehole 2
And a flame hole 3 having a small diameter are provided in the intersecting direction, and a hot junction c of a thermocouple TC to be installed in a concave portion 9 provided in a part of the peripheral wall of the burner body 5 is provided for the thermocouple heating flame hole 2, The large flame a formed in one flame hole 2 and the small flame b formed in the other flame hole 3 are faced to the crossing points of the outer flames of the large flame a and the small flame b in front of 3 between them. It is configured to heat so as to sandwich the hot junction c of the thermocouple TC with. As shown in Fig. 2, when the input of the stove burner is large (when the capacity is large), the flames a and b formed in the thermocouple heating flame holes 2 and 3 also become large, so the thermocouple The TC hot junction c is efficiently and surely heated by the small flame b with high temperature external flame. Also, as shown in Fig. 3, when the input is small (when the capacity is small), the thermocouple heating flame hole Since the flames a and b formed in 2 and 3 also become small, the hot junction c of the thermocouple TC is efficiently and reliably heated by the high flame a of the external flame having a high temperature. In this embodiment, the large and small flames a and b intersect at the tip, but the amount of heat does not change. Further, regarding the positional relationship between the large and small flames a and b formed in the thermocouple heating flame holes 2 and 3 and the hot junction c of the thermocouple TC, the hot junction c of the thermocouple TC is transformed into the deformation of the flames a and b. (spread)
Is preferably the smallest position.

The embodiment described above is a case where the present invention is applied to a stove burner, but it goes without saying that it can also be applied to other gas burners.

Incidentally, as in the embodiment, the thermocouple is installed in a recess provided in a part of the peripheral wall of the burner body, and the hot junction of the thermocouple is provided facing the front between the thermocouple heating flame holes, Since the thermocouple is not exposed to the outside, it is not necessary to provide a notch for the thermocouple in the soup tray, which facilitates the manufacturing process. Also,
Since the thermocouple is completely covered with the burner cap, broth and the like do not adhere to the thermocouple, so that the thermocouple function is not impaired and corrosion is prevented, so that the durability is improved.

[Effect of device]

According to the thermocouple heating structure of the gas burner of the present invention, since the thermocouple is heated at a place where two large and small flames formed by the two large and small flame ports in the intersecting direction intersect each other, the gas burner input When the input is small, the thermocouple is heated by the external flame with the high temperature of the small flame, and when the input is small, the thermocouple is heated by the external flame with the high temperature of the large flame. Is always efficiently and reliably heated at a constant temperature. Since a uniform thermoelectromotive force is always obtained, the thermoelectromotive force rises quickly at the time of ignition (when the capacity is large), and the thermoelectromotive force is stable when the capacity is throttled (when the capacity is small).

Further, since the flames cross each other with the large and small flame ports oriented in the intersecting direction, there is a certain place where an external flame formed from the large and small flame ports is present, so the position of the thermocouple is extremely easy to set. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of a thermocouple heating structure for a gas burner according to the present invention, and FIG. 2 is a perspective view of only a burner cap showing a state of a flame with a large capacity. FIG. 3 is a partial elevational view of a burner cap showing a state of a flame with low ability, and FIG. 4 is a cross-sectional view of a conventional example. 1 ... Main flame hole, TC ... Thermocouple, 2, 3 ... Thermocouple heating flame hole, a, b ... Flame.

Claims (1)

[Scope of utility model registration request] 1. A gas burner for heating a thermocouple (TC) with a part of a main flame hole (1), wherein thermocouple heating flame holes (2), (3) having different flame mouth areas are crossed. The thermocouple (TC) is set at the intersection of the external flames of the large flame (a) and the small flame (b) formed in the flame holes (2) and (3), and the input of the gas burner A thermocouple heating structure for a gas burner, characterized in that the hot junction (c) of the thermocouple (TC) can be heated by an external flame regardless of size.