JPH01139917A - Thermocouple device for gas burning apparatus - Google Patents

Abstract

PURPOSE:To generate the required minimum thermo electromotive force of a thermocouple in a short time after the start of heating by bringing an inner element in partial contact with a inner surface of an outer shell by partially deforming the inner element to have a flange-like projection whose diameter is approximately equal to the inner diameter of the outer shell element at a position a little closer to the root from a joint of the outer shell element and the inner element. CONSTITUTION:An inner element 2 is thick at a joint with a lead wire A3 connected to a solenoid value 8, and is thinner at a position nearer the joint 5 with an outer shell element 1. The inner element 1 is partially in contact with the inner surface of the outer shell element 1 by a flange-like projection 2' whose diameter is equal to the inner diameter of the outer shell element 1 at a position closer to the root from the joint 5, and other parts of the inner element is away from the inner surface of the outer shell element 1 with an evenly spaced gap. Since there is the space between the outer shell element 1 and the inner element 2 by the constitution, the thermal capacity is small, resulting in the instant heating of the joint 5 by a gas flame. Therefore, the minimum electromotive force required to hold the solenoid valve can be obtained in a short time of heating.

Description

[Detailed description of the invention] Industrial applications The present invention relates to ignition of a gas burner such as a gas staple.

This invention relates to gas combustion equipment and medium thermocouple devices suitable for use as power sources for gas solenoid valves that supply or cut off gas during fire extinguishing.

BACKGROUND OF THE INVENTION In recent years, thermocouple devices for gas combustion appliances have been widely used as power sources for safety devices for gas condensers, vents, and gas staples.

An example of the above-mentioned conventional thermocouple device for gas combustion equipment will be described below with reference to the drawings.

Figure 6 is a cross-sectional view of a conventional thermocouple device for gas combustion equipment (
The vb curve in FIG. 6 shows the electromotive force characteristics of a conventional thermocouple over time. In FIG. 6, 1 is an outer shell element with a positive thermoelectromotive force, 2 is an internal element with a negative thermoelectromotive force, 3 is a conductor A connected to the inner element, 4 is a holding case that holds the outer shell element, and 6 is a holding case that holds the outer shell element. A joint 6 connecting the outer shell element 1 and the inner element 2 by welding or the like is a conductive wire B connected to the holding case.

FIG. 2 is an overall diagram of the connections between the solenoid valve 8 and the thermocouple. The conducting wire A3 is connected to the center of the solenoid valve 8, and the conducting wire B6 is connected to the center of the solenoid valve 8.
It has a terminal 7 at the end so that it can be easily connected to a metal part such as a gas cock.

The operation of the thermocouple device for gas combustion equipment configured as described above will be described below.

First, it was heated by the flame of the stove burner.

The junction between the outer shell element 1 and the inner element 2 generates a thermoelectromotive force, and the conductor A3. An electric circuit is constructed by pushing the shutoff valve 10 against the spring 11 by an external operation flowing through the conductor B6 to the solenoid valve 8, and the shutoff valve 1o is
It will be attracted inside the solenoid valve 8.

Problems to be Solved by the Invention However, in the above configuration, the gas flame
Even if the joint part 6 is heated, the inner element 2 will not remain on the inner surface of the outer shell element 1.
Because they are in close contact with each other, the heat capacity is large and the thermal response speed is slow, and as shown in the vb curve shown in Fig. 6, the time required for the solenoid valve 8 to reach the bed thermoelectromotive force v0 necessary for adsorption and holding is , Tj was required from the start of heating. Therefore,
It has been discovered that users of gas appliances find it inconvenient because it takes more time to start using them compared to conventional appliances without safety devices.

The present invention solves these problems and reduces the thermal electromotive force V in a short period of time from the start of heating. The present invention provides a thermocouple device for gas combustion equipment that achieves the following.

゛ Means for Solving the Problems In order to solve the above problems, the thermocouple device for gas combustion equipment of the present invention includes an outer shell element made of a metal having a positive thermoelectromotive force, and a small portion inside the outer shell element. The internal element has a space between it and the inner surface of the outer shell and has a negative thermoelectromotive force. It is processed to be thin, and in some places slightly closer to the base than the joint between the outer shell element and the inner element, there is a brim-shaped bulge that is almost the same as the inner dimension of the outer shell,
Alternatively, it is formed by partially deforming or the like so that it has approximately the same dimensions, and is provided with an internal element that positively contacts the inner surface of the outer shell.

Function: With the above-described configuration, the present invention can have a space between the inner surface of the outer shell element 1 and the inner element 2, so the heat capacity becomes small, and the joint part 6 is instantaneously heated by the gas flame. With a short heating time, the electromotive force that holds the solenoid valve can be reached.

EXAMPLE Hereinafter, a thermocouple device for gas combustion equipment according to an example of the present invention will be described with reference to the drawings.

FIG. 2 is an overall configuration diagram.

FIG. 1 is a sectional view of a thermocouple device in an embodiment of the present invention. Reference numeral 1 denotes an outer shell element having a positive thermoelectromotive force, which is composed of several cylinders, and is shaped so that the thickness becomes thinner toward the tip. 2 is an internal element having a negative thermoelectromotive force. The internal element 2 is connected to a conductor A3 connected to the solenoid valve 8.
The joint with the outer shell element 1 is thick, and becomes thinner as it approaches the joint 6 with the shell element 1, and in some places slightly closer to the base than the joint 6, there is a brim-shaped bulge that is almost the same as the inner dimension of the shell element. 2' is in partial contact with the inner surface of the outer shell element, and the other portions of the inner element 2 are configured to have a space substantially uniform with the inner surface of the outer shell element. Reference numeral 4 denotes a holding case for holding the outer shell element 1 and at the same time attaching the thermocouple device to the device. 5 is an outer shell element 1 and an inner element 2
It is a thermal junction that generates thermoelectromotive force.

Reference numeral 6 denotes a conductor B, which has a terminal 7 at its end, as shown in FIG. 2, so that it can be easily connected to a metal part such as a gas cock.

3 and 4 show another embodiment of the internal element 2, with FIG. 3 being a side view and FIG. 4 being a front view.

A part of the inner element 2 near the tip is deformed to have almost the same dimensions as the inner dimensions of the outer shell element.

It was configured as above. The operation of the thermocouple device for gas combustion equipment will be described below with reference to FIGS. 1, 2, and 6. The shell element 1 is heated by the gas flame and generates thermoelectromotive force.

The generated negative thermoelectromotive force enters the solenoid valve 8 through the conductor A3. The positive thermoelectromotive force is connected to the metal part of the gas cock through the conductor B6, enters the electromagnetic valve 8, and forms an electric circuit. As shown in the graph of the relationship between linear electromotive force and time in FIG. 6, the thermocouple device of the present invention has a smaller heat capacity than conventional products and therefore has better thermal responsiveness, so it is easier to heat up and cool down. Compared to the VB curve of the conventional product, the product of the present invention has a VA curve, and the solenoid valve needs the bottom of the step to attract and hold, and the time to reach 0 electromotive force is (T2 - T1) earlier than the solenoid valve, and the solenoid valve separates. The time it takes for the electromotive force to fall to v1 (T4-T3
) is faster.

Effects of the Invention As described above, the present invention has the advantage that the internal dimensions of the outer shell element and the
It is shaped by partially deforming processing to have approximately the same brim-like bulge, shading, and approximately the same dimensions, and is provided with an internal element that partially contacts the inner surface of the outer shell.
This is extremely advantageous in practice because it reaches the bed thermoelectromotive force v0 in a short time from the start of heating.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a thermocouple device for gas combustion equipment according to an embodiment of the present invention, Fig. 2 is an overall external configuration diagram of Fig. 1, and Fig. 3 is another embodiment of the internal elements of the thermocouple device. Example side view,
FIG. 4 is a front view of the same, FIG. 6 is a graph of the relationship between thermoelectromotive force and time for a product of the present invention and a conventional product, and FIG. 6 is a sectional view of a conventional thermocouple device for gas combustion equipment. 1...Outer shell element, 2...Inner element, 3
...Conductor A, 4...Holding case, 8.
·····solenoid valve.

Claims (1)

[Claims] The inner element is composed of an outer shell element made of metal having a positive thermoelectromotive force, and an inner element having a negative thermoelectromotive force having a space inside the outer shell element and the inner surface of the outer shell except for a small part. The base of the joint with the conductor that connects to the solenoid valve is thick, and the vicinity of the tip is made thinner, and at some points slightly closer to the base than the joint between the outer shell element and the inner element,
Equipped with a brim-like bulge that is approximately the same as the inner dimension of the outer shell element, or an inner element that is partially shaped by deformation processing so that it has approximately the same dimensions, and that is in close contact with the inner surface of the outer shell.
Thermocouple device for gas combustion equipment.