JPH0773076B2 - Quartz tube heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quartz tube heater that can be used in a vertical direction by holding a high-temperature hot wire used by being red-heated in a flexible inorganic fiber body. is there.

2. Description of the Related Art A conventional quartz tube heater is a heater element in which an insulating coating is formed on the surface and wound in a close contact state as shown in FIG.
Place 101 in a quartz tube 102 and attach both ends to the end cap 10
It was a structure supported by 3.

Problems to be Solved by the Invention In such a conventional configuration, it takes time until the heater element 101 is in the red hot state, and electromagnetic noise is generated at the initial stage of energization, which causes discomfort. Also heater element
There was a problem that the weight of 101 was too bulky and costly.

The present invention solves such conventional problems, and an object of the present invention is to provide an economical quartz tube heater for vertical use, which has a fast rise time and produces no energizing noise.

Means for Solving the Problems In order to solve this problem, the present invention is directed to a heater element composed of a high-temperature heating wire used by being red-heated, a quartz tube accommodating the heater element, and both ends of the quartz tube. Provided with an end cap for supporting the heater element, the heater element is formed by inserting a flexible inorganic fiber body into an internal space of the high-temperature heating wire wound in a spiral shape to secure the high-temperature heating wire. It is pressed flat and held by the inorganic fiber body.

With this configuration, even when the quartz tube heater is used vertically, the high-temperature heating wire is held by the inorganic fiber body and the end portion of the inorganic fiber body is supported by the end cap. It is applied to the inorganic fiber body at each pitch between the wires, the self-weight of the high-temperature heating wire is dispersed, and it is extended locally to prevent the high-temperature heating wires from contacting with each other, thereby preventing an abnormal high temperature.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. That is, after the high-temperature heating wire 2 that glows red when energized is spirally wound, a substantially string-like inorganic fiber body 3 is inserted inside the wound high-temperature heating wire 2, and the high-temperature heating wire 2 is inserted. The heating wire 2 for high temperature wound in a circular shape is pressed into a flat shape and is deformed into a flat shape, and the inorganic fiber body 3 is held by the heating wire 2 for high temperature to support the heating wire 2 for high temperature on the inorganic fiber body 3. At the very least, the heater element 1 is formed, the heater element 1 is inserted into the quartz tube 4, and both ends of the heater element 1 are supported by end caps 5 provided at both ends of the quartz tube 4 to form a quartz tube heater. . High temperature heating wire 2
Uses a band-shaped heating wire that reduces the mass and the heat radiation surface area is the same as that of the conventional close-wound winding, and is configured so that the red heat becomes stable immediately after energization.

In the above structure, when the quartz tube heater is energized, the high-temperature heating wire 2 rapidly red heats and is radiated. On the other hand, the weight of the high-temperature heating wire 2 is applied to the inorganic fiber body 3 for each inter-wire pitch, and the self-weight of the high-temperature heating wire 2 is dispersed, so that the high-temperature heating wire 2 does not fully extend. Further, since the mass of the high-temperature heating wire 2 is small, the number of supporting points is large, and the red-hot rising time is short, the electromagnetic noise that is conventionally generated at the initial stage of energization is hardly generated. It should be noted that, although the strip heating wire is used as the high temperature heating wire according to this embodiment, the high temperature heating wire is not limited to the strip heating wire.

EFFECTS OF THE INVENTION According to the present invention as will be apparent from the description of the embodiments above, according to the present invention, a flexible inorganic fiber is inserted into the internal space of the high-temperature heating wire spirally wound, Since it is pressed and flattened and held by the inorganic fiber body, it can be used in the vertical direction, and there is no electromagnetic noise in the initial stage of energization, and there is an effect that the high-temperature heating wire rises quickly until it glows red.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a quartz tube heater according to an embodiment of the present invention, FIG. 2 is a lateral sectional view of the quartz tube heater, and FIG. 3 is a longitudinal sectional view of a quartz tube heater in a conventional example. 2 ... High temperature heating wire, 3 ... Inorganic fiber body, 4 ... Quartz tube, 5 ... End cap.

Claims (1)

[Claims] 1. A heater element formed of a high-temperature heating wire that glows red, and a quartz tube that houses the heater element.
Equipped with end caps provided at both ends of the quartz tube to support the heater element, the heater element is formed by inserting a flexible inorganic fiber body into an internal space of the high-temperature heating wire wound in a spiral shape, A quartz tube heater in which the heating wire for high temperature is flattened under pressure and held by the inorganic fiber body.