JPH06281143A - Ignition plug for gas apparatus - Google Patents

Abstract

PURPOSE:To perform an assured ignition by preventing an electric current from leaking through an overflowed juice at the time of cooking by a gas apparatus by covering the outer periphery of an electrode with an insulator made of fluororesin. CONSTITUTION:An ignition plug A of a gas apparatus is constituted of an electrode 1 made of a metal wire and an insulator 2 which covers the outer periphery of the electrode 1. The insulator 2 is formed of fluororesin, e.g., tetrafuoroethylene with a favorable lubricity. When a juice is overflowed at the time of cooking by the gas apparatus, the juice may hit the ignition plug A. However, the insulator 2 of the ignition plug A has sliding property on the surface, and therefore, the juice does not stick to the surface. Accordingly, an electric current does not flow through the juice on the surface of the insulator 2, and ignition can be assuredly performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spark plug used to ignite a gas appliance such as a table gas stove.

[0002]

2. Description of the Related Art A conventional spark plug A'of a gas appliance is generally formed by covering an outer periphery of an electrode rod 1 made of a metal wire with a ceramic insulator 2'as shown in FIG. Met.

[0003]

However, the porcelain insulator 2'is likely to adhere the broth a, and when the broth a adheres to the surface of the ceramic porcelain 2'as shown in FIG. 3, the surface of the porcelain insulator 2'is. There is a problem in that a current flows through and the current leaks as shown by an arrow b, the spark does not start from the tip of the electrode rod 1, and ignition failure occurs. Further, since an electric current flows on the surface of the insulator 2 ', there is a problem that an abnormal discharge occurs in the direction of arrow d in FIG. 3 with respect to the metal object c of the gas appliance and ignition does not occur (arrow e in FIG. 3).
Is a normal discharge).

The present invention has been made in view of the above problems, and an object of the present invention is to provide an ignition plug of a gas appliance in which broth is less likely to adhere to an insulator and ignition is ensured. .

[0005]

In order to achieve the above object, the ignition plug of the gas appliance of the present invention is characterized in that the outer circumference of the electrode rod 1 is covered with a resin insulator 2 made of fluororesin. .

[0006]

With the resin insulator 2 made of a fluororesin as described above, the liquor of the fluororesin prevents the broth from adhering to the surface of the insulator 2 so that no current flows and the current leaks. It will not happen. Therefore, the tip of the electrode rod 1 is discharged and is surely ignited.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an ignition plug A is composed of an electrode rod 1 made of a metal wire and an insulator 2 covering the outer periphery of the electrode rod 1. The insulator 2 is made of resin, but in the case of the present invention, it is made of a fluororesin having good lubricity such as tetrafluoroethylene. Resin insulator 2 made of fluororesin
The following method, for example, is used to coat the.
A heat-shrinkable tube is formed from a fluororesin, the electrode rod 1 is inserted into the tube, and heat is applied to the tube to cause heat shrinkage to bring it into close contact. Examples of this fluororesin tube include Chuko Flow heat shrinkable tube TKF-100 series (PTFE) manufactured by Chukoh Chemical Industries, Ltd. It has heat and cold resistance that does not impair its properties under temperature conditions of -196 ° C to + 260 ° C, and has chemical resistance that is stable to chemicals and solvents under high temperature and high pressure. It has excellent electrical properties such as high insulation and low high-frequency loss, and has weather resistance that does not change over time due to high temperature and humidity, ultraviolet rays, water, mold and the like. When molding the fluororesin insulator 2 using a molding die,
The electrode rod 1 may be set in a molding die and the electrode rod 1 may be insert-molded.

The spark plug A formed in this manner is attached to a gas stove B as shown in FIG. 2 and used for ignition. A burner section 5 is provided at the tip of a mixing tube 4 for mixing gas and air injected from the gas nozzle 3, and a spark plug A is mounted below the ignition port 6 of the burner section 5. A protrusion 7 for receiving an electric discharge is provided at a position of the spark plug A facing the tip of the electrode rod 1. Spark plug A
A piezoelectric device or the like for generating power by operating a gas cock is connected to the electrode rod 1. A thermocouple 8 for checking ignition is provided on the side of the spark plug A.

However, when the gas cock is operated to energize the electrode rod 1 from the piezoelectric device or the like, the projection 7 is projected from the tip of the electrode rod 1.
A discharge as indicated by an arrow e is performed toward and the gas is ignited by the spark generated at this time. By the way, while boiling water may be spilled when a pot or the like is placed on the burner portion 5, cooking may spill over the spark plug A. However, since the insulator 2 of the spark plug A is made of a resin such as a fluororesin, the insulator 2 has a smooth surface, so that the broth is unlikely to adhere thereto. Therefore, the ignition is reliably performed without the electric current flowing through the surface of the insulator 2 due to the boiling water.

[0010]

As described above, according to the present invention, the outer circumference of the electrode rod is covered with the resin insulator made of fluororesin.
The smoothness of the fluororesin prevents the boiling water from adhering to the surface of the insulator, which prevents current from leaking, and discharges from the tip of the electrode rod for reliable ignition. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a spark plug of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the above ignition plug is provided on a gas stove.

FIG. 3 is a sectional view of a conventional example.

[Explanation of symbols]

 A Spark plug 1 Electrode rod 2 Insulator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Enomoto Yu 1-52, Minami-shi Oka, Minato-ku, Osaka Co., Ltd. Harman Co., Ltd. (72) Inventor Kamo Maeda 1-52 Oka, Minami-shi Minato, Osaka In Herman

Claims (3)

[Claims] 1. An ignition plug for a gas appliance, characterized in that the outer periphery of the electrode rod is covered with a resin insulator made of fluororesin. 2. The ignition plug for a gas appliance according to claim 1, wherein the electrode rod is covered with a resin insulator by covering the electrode rod with a tube made of fluororesin. 3. The ignition plug for a gas appliance according to claim 1, wherein a resin insulator is integrally formed on the outer circumference of the electrode rod with a fluororesin and is covered with the resin insulator.