JPS6119085A - Heating and temperature holding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to heating and insulation devices, and more particularly to self-regulating heating elements. This invention relates to a flexible heating/warming device.

[Prior art]

FIG. 1 is a structural explanatory diagram of a conventional heating/warming device,
A flexible heater J is connected to the heater power source /.

A relay 3 is attached in the middle of the heater λ. A temperature control device for operating the relay 3 is connected to the relay 3. A thermocouple S is taken out from the temperature control device V.

The electric heating unit 5 is adapted to measure the temperature of, for example, a piping base as an object to be heated.

The temperature is measured with a thermocouple S, and a signal of this value is sent to a temperature control device D. The temperature control device automatically compares this signal with a preset temperature corresponding to the signal, and based on the comparison value, the temperature control device turns the relay J ON-OFF. By repeating such operations, the pipe 6 is maintained at a predetermined temperature.

Figure 2 shows another example of a conventional heating/warming device.
The heater power supply is connected via a power supply line 9 to a self-regulating heating element (for example, one made mainly of BaTLOy, hereinafter abbreviated as the heating element) covered with a sheath 10 made of thin metal. .

In the heating/warming device configured as described above, when the heater power source is turned on, the heating element t generates one heat, which corresponds to the heater taco shown in FIG. 7. When this heating element t is heated to the control temperature shown in FIG. 3, the resistance value of the heating element g increases significantly as the temperature rises thereafter, and current no longer flows through the heating element g. In other words, the function of the heating element g as a heater is kept in stock.

On the contrary, when the temperature of the heating element falls, its resistance value decreases, the heating element g is energized again, and its function as a heater is restored. By repeating such actions, the pipe 6 is maintained at a predetermined temperature.

By the way, regarding the above-mentioned example of the first heating/warming device,
When heating and keeping warm a large and complicated heated object with heaters J, the temperature of the heated object is determined by one thermocouple 5.
will be represented by.

There were drawbacks such as the temperature of the heated body inevitably becoming non-uniform. Also, shorten the length of the heater.

In order to uniformly heat and maintain the temperature of the heated object by increasing the number of heater tacos, it is necessary to prepare a relay 3゜temperature control device q and a thermocouple S for each heater taco, which increases the heating and heat retention. Another drawback was that the cost of the device would increase.

Regarding the above-mentioned No. 1 heating/warming device, since the heating element t is made of a hard material, the heating φ warming device itself cannot be deformed, and it is difficult to heat and keep warm objects with complex shapes. The drawback was that it couldn't be done.

[Summary of the invention]

This invention was made with the aim of eliminating the above-mentioned drawbacks, and has a simple configuration in which a bendable insulator is provided between self-regulating heating elements, so that even a biaxially shaped heated object can be heated. It is an object of the present invention to provide a heating/warming device that can provide a sufficient heat transfer path, uniformly heat a heated object, and maintain it at a predetermined temperature.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the heating/warming device of the present invention will be described below with reference to the drawings. FIG. V is a sectional view showing an embodiment of the present invention, and the same or corresponding parts as in FIGS. 1 and 2 are designated by the same reference numerals, and the explanation thereof will be omitted. The heater power source is connected to a plurality of heating elements /j via a power source liner. An insulator is provided around heating element/1 and heating element/1. This insulator // is made of powder such as MpO. The portion of the insulator 1/ between the heating elements it has a smaller diameter than the portion of the heating element/1, and is covered with a cylindrical thin metal sheath 10. Further, the heating element /j- is connected in parallel to the linear power supply line.

In the heating/warming device configured as described above, heating of the object to be heated is started by turning on the heater power supply. Then, depending on the change in resistance value due to the heating element's own temperature, the heating element/l changes from 0N to OFF.
By repeating the operation, the heated object is maintained at a predetermined temperature.

In the heating/warming device configured as described above, since the bendable insulator/l is interposed between the heating elements it, the heating/warming device as a whole becomes bendable. Even when the heating body has a complicated shape, a heating/warming device can be attached to the heated body. In particular, the heating element/
Since the diameter of the gap is small, the heating/warming device is more flexible. Furthermore, since the heating elements/pieces are arranged in parallel to the power supply line, the overall length of the heating/warming device can be freely changed by cutting between the heating elements 11. Furthermore, even if the heat dissipation I of the heated body differs between parts A and B shown in FIG. 1t of heating elements corresponding to parts B and B.
Since the current flowing through Hc is turned ON and OFF independently, the entire heated body can be maintained at a uniform temperature.

In addition, in the above embodiment, a cylindrical sheath lO is attached to the insulator/l.
Although the case where the sheath is covered has been described, the sheath may be formed into a bellows shape in order to provide flexibility with the heating/warming device. Further, when the diameter of the heating element is small, the heater can be bent freely without making the diameter of the insulator between the heating elements smaller than that of the heating element, and the same effect as in the above embodiment can be achieved. Further, the shape of the heating/warming device is not limited to a cylindrical shape, but may be, for example, a flat plate shape or a polygonal shape.

〔Effect of the invention〕

As explained above, the heating/warming device of the present invention has a simple configuration in which a bendable insulator is provided between the self-regulating heating elements, so even if the heated object has a complicated shape, it can be heated easily. A heating Φ heat insulating device can be attached to the heated object and a sufficient heat transfer path can be obtained.

The object to be heated can be uniformly heated and maintained at a predetermined temperature.

[Brief explanation of the drawing]

The explanatory diagram, FIG. 3, is a diagram showing the relationship between the temperature and the resistance value of the self-regulating heating element, and FIG. 7 is a sectional view showing one embodiment of the present invention. /@@Heater power supply - 2 fists - heater, 6 piping (heated object), Ri... heater power supply, g, it... self-controlled heating element, 9... power line, lθ/sheath, //- - Insulator. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A power supply line, a plurality of self-control heating elements connected to the power supply line, and an insulator bendably provided between the self-control heating elements. Heating and heat retention equipment. (2) The heating/warming device according to claim 1, wherein each self-regulating heating element is connected in parallel to a power supply line. (3) The heating/warming device according to claim 1 or 2, wherein the external dimensions of the insulator are smaller than the external dimensions of the self-regulating heating element. (4) The heating/warming device according to any one of claims 1 to 3, wherein each self-controlled heating element is arranged in parallel with a power supply line.