JPS61138132A - Member for announcing abnormal temperature rise - Google Patents

Abstract

PURPOSE:To simplify a member for announcing an abnormal temp. rise and to reduce the cost thereof by sealing an odorous material into an enclosure which melts down to rupture when the temp. rises abnormally and evaporating the odorous material to emit an alarm when the temp. rises abnormally. CONSTITUTION:The odorous material consisting of, for example, ester or the like which has odorousness and has no inflammability is sealed into a microcapsule 1 consisting of, for example, gelatin, etc. The capsules are stuck to the surface of a base 2 consisting of a sheet such as paper and an adhesive sheet 3 is stuck to the rear thereof to constitute a label 7. The label 7 is adhered to an object A of which the temp. is likely to arise abnormally. The heat of the object A is conducted through the adhesive sheet 3 and the base 2 to the capsules 1 when the temp. of the object A rises abnormally. The odorous material diffuses into the air and announces the abnormality when the shell of the capsules 1 is heated up to the melting temp.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention emits odorous substances when the temperature rises abnormally by attaching it to places where abnormal temperature rise is expected due to malfunctions, such as electrical parts. The present invention relates to an abnormal temperature rise notification member that issues an alarm when the temperature rises.

[Background of the invention]

Conventionally, a method is generally known for detecting abnormal temperature rise, in which a detection sensor is provided that generates an electrical output in response to the temperature rise. For example, using a temperature sensing element such as a thermistor, the change in resistance value with respect to temperature can be measured using electrical amplification means.
This is a detection method.

However, if the temperature-sensing element and its amplifier are installed in individual electronic parts that are expected to generate abnormal heat during busy periods, such as inside complex electrical or electronic products, the structure becomes even more complicated. Moreover, it has the drawbacks of being large and very expensive.

[Purpose of the invention]

An object of the present invention is to provide a simple and inexpensive abnormal temperature rise alarm member that uses odor emission without using the above-mentioned electrical means.

[Summary of the invention]

The abnormal temperature rise notification member of the present invention is characterized in that an odorous substance is enclosed in an enclosure that melts and breaks when the temperature rises abnormally.

[Embodiments of the invention]

FIGS. 1, 2, and 3 are schematic enlarged cross-sections of different embodiments of abnormal temperature rise notification labels according to the present invention.

In Fig. 1, 1 is a microcapsule containing an odorous substance, 2 is a paste such as paper, metal, or synthetic resin sheet, and 3 is a paste for attaching the paste to an abnormally heated test object, such as an electronic component. It is an adhesive sheet. The microcapsules 1 are attached and installed on the surface of the paste 2. When the microcapsules reach a predetermined temperature, the outer shell melts and the odorous substances inside are released.

When the label 7 with the above configuration is attached to the object A, the adhesive sheet 3 and the paste 2 are removed from the object A which is experiencing abnormal temperature rise.
When electricity is applied, heat is transferred to the microcapsules 1. When the outer shell of the microcapsule 1 reaches its melting temperature, an odorous substance is released into the air, alerting people to an abnormality.

The label 7 shown in FIG. 2 is made by attaching the adhesive sheet 3 to the above-mentioned microcapsules 1 on both sides of the paste 20, and contains a larger amount of odorous substances than the one-sided label shown in FIG. It is possible to diverge.

The label 7 shown in FIG. 3 is made by impregnating or mixing an odorous substance 4 into paper, cloth, fiber, etc. 6 and sealing it with a protective film 5 that melts when the temperature rises abnormally.
This is the one with the . If this label is pasted on the object for which you want to detect an abnormal temperature rise, when the protective film 5 melts due to the heat from the object that has caused the abnormal temperature rise, the odorous substance 4 will be emitted, and the abnormal temperature rise will be notified. You can.

FIG. 4 shows an example of use in which the label 7, which seals off an odorous substance, is attached to an electronic component that is expected to generate abnormal heat due to a failure or the like. Reference numeral 9 designates an electronic component such as a transistor, which is expected to generate abnormal heat due to a failure, 8 a heat sink, and 10 a printed circuit board.

7-1 is a case where the above label is pasted on the radiator,
7-2 is a bonus when pasted on the transistor body.
.

Generally, when an abnormal current flows due to a failure of a load connected to the output of a transistor, IC, etc., abnormal heat generation occurs. If the current is continued in this state, the transistor or RC itself may catch fire, or the load side may catch fire, easily causing a fire. Furthermore, oscillation may occur in the transistor itself for some reason, causing abnormal heat generation.

However, if a label with the above structure is attached to a place where abnormal heat generation is expected, people can be notified of the danger before the temperature reaches the point of ignition.

Of course, it is clear that the same warning effect can be achieved even if the label is attached not only to electronic parts, but also to mechanical mechanisms such as □ bearings, or other locations where abnormal heat generation is expected.

Furthermore, by using multiple types of microcapsules each containing different odorous substances in shells with different melting temperatures, it is possible to construct a thermometer that notifies temperature changes as odor. For example, a microcapsule whose outer shell melts at 60°C is filled with a flavoring agent of 4 nanograms, an apple shell that melts at 80°C, and a 9-inch fragrance that melts at 100°C. etc.

Also, thermo paint (paint that changes color when it reaches a certain temperature and does not return to its original color even when the temperature returns to normal).
If used in combination with the above-mentioned label and affixed the above-mentioned label to the painted area, in addition to the above-mentioned g alarm effect, the effect of easily discovering the area where abnormal temperature rise has occurred can be obtained.

Furthermore, if a label containing a substance with a different odor encapsulated in a microcapsule or a protective film as described above is affixed to each part to be tested, it is possible to identify which part has experienced an abnormal temperature rise based on the odor.

The odorous substance used in the present invention may be any substance as long as it is odoriferous and flammable. For example, esters, ammonia, aromatics, acetic acid, etc. may be used.

Since this is volatile at room temperature, it is sealed with microcapsules or a protective film.

Suitable materials for the microcapsules include gelatin, gum arabic, vinylpyrrolidone, nylon, polyethylene, ethylcellulose, paraffin, and the like.

The material of the protective film is thermoplastic resin, polyethylene, t
e') Vinyl chloride, epoxy, Tsukurafuin, etc. are suitable. Further, the material of the microcapsule or the protective film may be selected from a material that does not chemically change with the odorous substance sealed inside.

For example, if the odorous substance is ammonia water, water-insoluble paraffin can be used as the material for the microcapsules. In this case, the temperature at which the graphin melts is around 60°C, so it can be used for an element with an abnormal temperature rise of 60°C. You can also change the melting temperature of No9 Rough-in by adding mixtures to it.

If paraffin is used as a coating (protective film), a sheet-like product can be easily constructed.

Note that the microcapsules may be manufactured using the already known methods such as 1. Electrostatic coalescence method and 6. Spray granulation method.

Further, as shown in FIG. 5, a bag-shaped film (protective film) 11 filled with odorous gas (for example, ammonia gas, chlorine gas, etc.) is attached to the test object A via the adhesive tube 3.
It is also possible to adhere the film 11 to the surface and melt the film 11 (by abnormally rising temperature) to blow out the gas inside. This coating 11 may be made of polyethylene, nylon, etc., for example.

Furthermore, instead of providing the above-mentioned microcapsules containing an odorous substance on the surface of a sheet and making it into a label and pasting it on the test object, it is possible to mix the microcapsules with a known paint and use it to detect abnormalities in electronic parts, etc. A similar abnormal temperature rise warning effect can also be obtained by applying it to a test object whose temperature is expected to rise.

Note that an odorous substance that does not volatilize at room temperature but evaporates when the temperature rises abnormally may be used. In this case, the odorous substance is impregnated into cloth, paper, fibers, etc. without being sealed with microcapsules or a protective film. It can be just something.

Furthermore, if the odorous substances described above are combined with smoke-emitting substances, it is possible to further increase the warning effect of abnormal temperature rise compared to the combination of smell and vision.

[Effects of the Invention] The abnormal temperature rise notification member of the present invention has a simple and inexpensive structure, and can notify abnormal temperature rise by simply pasting or coating it on a location where abnormal temperature rise is desired to be detected. Moreover, it has the advantage of being applicable to narrow and small places.

[Brief explanation of the drawing]

1, 2, and 3 are enlarged cross-sectional views of different embodiments of the label for abnormal temperature rise notification according to the present invention, FIG. 4 is a diagram illustrating the state of use thereof, and FIG. 5 is a diagram according to the present invention. It is a figure showing other examples of. 1...1 Microcapsule 2...Pace 3...
Adhesive sheet 4...Odor substance 5...Protective film
11...Coating A...Test object Fig. 1 Fig. 2

Claims (5)

[Claims] (1) An enclosure that melts and breaks at a predetermined temperature during abnormal temperature rise;
An abnormal temperature rise notification member comprising: an odorous substance sealed inside the enclosure. (2) The abnormal temperature rise notification member according to claim 1, wherein the enclosure is a microcapsule, and the odorous substance is a gaseous substance at a temperature lower than the predetermined temperature. (3) The abnormality according to claim 1, wherein the odorous substance is contained in, added to, or supported on a porous sheet, and the enclosure surrounds the sheet carrying the odorous substance. Temperature increase notification component. (4) The enclosure is provided on a label that has an adhesive layer and can be adhered to the detected part.
The member for abnormal temperature rise notification according to item 1 or 3. (5) The member for abnormal temperature rise notification according to claim 2, wherein the envelope containing the odorous substance is contained in a paint and can be applied to an object to be detected.