JPH01231286A - Silica tube heater - Google Patents

Abstract

PURPOSE:To speed up a raising time and to prevent generation of energizing sound by inserting one inorganic fiber body into a heating wire wound spirally for generating red heat between pitches of the wire, winding the other inorganic fiber body for retaining the heating wire, and fixing both inorganic fiber bodies by the ends of a heater element 1. CONSTITUTION:In a heater element 1, one inorganic fiber body 3 is inserted into a heating wire 2 wound spirally for generating red heat, the other inorganic fiber body 4 is wound between pitches of the wire 2, the wire is retained between both fiber bodies 3, 4, and both inorganic fiber bodies 3, 4 are fixed by the ends of the heater element 1. As a result, the pitch can be maintained constantly when the wire 2 with low mass is used vertically, and electromagnetic oscillation force at the time of energization are absorbed by the bodies 3, 4, and further the mass is reduced. It is thus possible to speed up the rising time of the wire for generating red heat and to prevent generation of electromagnetic sound at the initial time of energization.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a quartz tube heater which can be used vertically by supporting the inorganic fiber body by holding a red-hot heating wire in the inorganic fiber body.

BACKGROUND OF THE INVENTION Conventionally, this type of quartz tube heater has had a configuration as shown in FIG. In FIG. 3, 1o1 is a heater element with an insulating film formed on its surface and tightly wound. This heater element 101 is housed in a quartz tube 102, and both ends of the quartz tube 102 are supported by end caps 103. there were.

Problems to be Solved by the Invention In such a conventional configuration, it takes time for the heater element 1o1 to become red-hot, electromagnetic noise is generated during the initial energization, and the heater element 1o1 is tightly wound and there is no space between the wires. In order to generate an insulating coating on the surface of the crosspiece that does not cause short circuits, the weight of the heater wire increases, and the processing costs required to generate the insulating coating on the surface are also high, resulting in high costs.

The present invention solves these problems, and aims to provide a quartz tube heater that has a quick start-up time, does not generate energization noise, and is economical and can be used vertically.

Means for Solving the Problems The present invention solves the above problems, and consists of a heater element made of a red-hot heating wire, a quartz tube housing the heater element, and a heater element provided at both ends of the quartz tube. The heater element has an inorganic fiber body inserted into a spirally wound red-hot heating wire, and the inorganic fiber body for holding the wood is inserted into the end cap to support the heating element. The inorganic fibers are twisted together, a red-hot heating wire is held between both inorganic fibers, and both inorganic fibers are fixed at the ends of the heater element.

Function: With this configuration, the pitch between the wires can be maintained constant even when the red-hot heating wires with low mass are used vertically, and the electromagnetic vibration force when energized is absorbed by the fibers.Moreover, by reducing the mass, This results in a quartz tube heater that can be used vertically and has a faster red-hot start-up time.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes a heater element, in which a red-hot heating wire (hereinafter referred to as heating wire) 2 is wound into a spiral shape, an inorganic fiber body 3 is inserted on the circular diameter side, and then an inorganic fiber body for holding 4 is wound spirally between the wire pitches of the heating wire 2, and the heating wire 2 is held by the inorganic fiber body 3 and the holding inorganic fiber body 4. Further, a heating wire end portion (straight portion) 5 and an inorganic fiber body 3. The holding inorganic fiber body 4 is fixed with a terminal A6. Furthermore, a quartz tube 7 covers the heater element 1, and end caps 8 are provided at both ends of the quartz tube 7. Both ends of the heating wire 20 are fixed together with the lead wire 9 by terminals B10.

In the above configuration, the diameter of the heating wire 2 is reduced to reduce mass, or a band-shaped heating wire is used to make the heat dissipation surface area the same as that of a conventional tightly wound heating wire. Therefore, after applying voltage, heating wire 2
Since the mass of the heating wire 2 is small, there is no need for internal storage of heat, and the heating wire 2 quickly reaches a red-hot stable state. The temperature of the spiral portion 110 of the heating wire 2 when the heat is stable is 900°C to 1000°C.
Since the temperature is raised to about .degree. C., the tensile strength is reduced to about 1/1 of that of cold, and even the light heating wire 2 cannot maintain its shape without a support. The heating wire 2 is supported by an inorganic fiber body 3 and a holding inorganic fiber body 4, and the heating wire 2 is held between each wire pitch, so there is no risk of deformation and short circuit, and the surface of the heating wire 2 There is no need to create an electrically conductive insulating film. Furthermore, since the heating wire 2 is held in the inorganic fiber body, the electromagnetic vibration force generated at the initial stage of energization is also absorbed by the fiber body, and the electromagnetic sound does not reach a level that can be heard by the human ear. Then, at the heating wire end portion (straight portion) 5, the inorganic fiber body 3
．． Since the holding inorganic fiber body 4 is fixed to the terminal with a circle, no tension is applied to the spiral portion 11VC of the heating wire 2, and vertical use is possible.

Effects of the Invention As described above, according to the present invention, there is no electromagnetic noise at the initial stage of energization, the start-up is quick, and the cost is low. The effect is that it can be used.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a quartz tube heater according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the heater element, and FIG.
The figure is a longitudinal sectional view of a conventional quartz tube heater. 1... Heater element, 2... Red-hot heating wire, 3... Inorganic fiber body, 4...
Holding inorganic fiber body, 5... Heating wire end, 7...
...Quartz tube, 8...End cap〇Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure 3

Claims (1)

[Claims] It consists of a heater element made of an electric heat source for red heat, a quartz tube that houses this heater element, and an end cap provided at both ends of the quartz tube to support the heater element, and the heater element is spirally wound for red heat. An inorganic fiber body is inserted into the heating wire, another inorganic fiber body for holding is wound around the pitch between the red-hot heating wires, the red-hot heating wire is held between both inorganic fiber bodies, and both inorganic fibers are A quartz tube heater whose body is fixed at the end of the heater element.