JP2002022550A - Overheat detecting and alarming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an overheat detecting and alarming device capable of detecting an abnormal overheat of an electric apparatus, etc., simply and surely, and capable of maintaining accurate detection ability for a long time. SOLUTION: This overheat detecting and alarming device is mounted directly or indirectly on an apparatus and detects an abnormal overheat of the apparatus exceeding a prescribed temperature to issue an alarm signal, It is equipped with an alarm material 1 for presenting an alarm state such as smell emanation or coloring in case of abnormal overheat of the apparatus, a sealed container 5 at least a part of which is made of inorganic thin film 6 and the interior of which is filled with the material 1, and a sealed container breaking means 2 for detecting the overheat of the apparatus exceeding the prescribed temperature by a temperature rise of itself exceeding a prescribed temperature and breaking a part of the film 6 of the container 5 by a change in its shape attending on the temperature rise exceeding the prescribed temperature to bring the material 1 into the alarm state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an overheat detection alarm device. More specifically, the present invention relates to an overheat detection alarm device capable of easily and reliably detecting abnormal overheating of an electric device or the like and maintaining accurate detection capability for a long period of time.

[0002]

2. Description of the Related Art When an electric device or the like breaks down, there is a risk of causing a fire due to abnormal overheating. In order to prevent such a fire from occurring, various techniques for detecting abnormal overheating of electrical equipment and the like have been used.

[0003] In particular, so-called overheat detection labels are widely used because temperature changes can be easily checked without requiring a large-scale device.

[0004] As a conventional label for detecting overheating, a label using a temperature indicator whose hue changes depending on the temperature is known. This label for detecting overheating is used by being affixed to an electric device or the like, and is capable of visually confirming abnormal overheating due to a failure of the electric device or the like by a hue change of the temperature indicating material,
It is widely used as a simple overheat detection means.

[0005] However, this label for overheating detection is not suitable for equipment installed in a place where human eyes cannot reach, and for equipment where the overheating of a part behind the equipment such as the backside of the equipment poses a problem. In some cases, overheating was overlooked, leading to a fire.

[0006] On the other hand, a configuration in which a fragrance material is sealed in a sealing layer or the like made of a heat-meltable composition (composition containing fatty acids, alcohols, glycols, ethers, etc.) that melts at a predetermined temperature. When the label for overheating detection reaches a predetermined temperature due to abnormal overheating of electrical equipment, etc., overheat detection that detects abnormal overheating of electrical equipment etc. through the smell of humans by emitting fragrance outside the seal layer etc. Labels have been proposed (JP-A-6-66646, JP-A-6-6-6).
6647, JP-A-7-77463).

[0007] These labels for detecting overheating can detect abnormal overheating of electric equipment and the like through the smell of humans, and are installed in a place where human eyes cannot reach because the fragrance time is extremely long. It is possible to reliably detect abnormal overheating of a device that is overheated or a device where overheating of a portion that cannot be seen by the human eye, such as a portion on the back side of the device, is a problem.

[0008]

However, these labels for detecting overheating have a problem of enclosing a fragrance material with a sealing layer made of a heat-fusible composition containing alcohols, glycols, ethers and the like. In the case of long-term use, the fragrance component of the fragrance material gradually permeates, and in the case of long-term use, the fragrance component may leak to the outside and be erroneously detected.

Accordingly, an object of the present invention is to provide an overheat detection alarm device capable of easily and surely detecting abnormal overheating of an electric device or the like and maintaining accurate detection capability for a long period of time. To provide.

[0010]

SUMMARY OF THE INVENTION The present invention provides the following overheat detecting and alarming device to achieve the above object.

[1] An overheat detection / alarm device which is attached directly or indirectly to a device and detects an abnormal overheat of the device at a predetermined temperature or higher and issues an alarm signal. An alarm material exhibiting an alarm condition of
A sealed container at least partially formed of an inorganic thin film, in which the alarm material is sealed, and abnormal overheating of the device at or above a predetermined temperature is detected by increasing its own temperature or higher, and the predetermined temperature or higher is detected. An overheating detection alarm device, comprising: a sealing container damage means for causing a part of the inorganic thin film of the sealing container to be damaged by a change in shape at the time of raising the temperature so that the alarm material takes the alarm state. .

[2] The overheat detection alarm device according to the above [1], wherein the sealed container breaking means comprises any of a bimetal, a shape memory alloy, and a liquid or a gas whose volume increases due to a temperature rise.

[3] The inorganic thin film according to [1], wherein the inorganic thin film is a single-layer thin film of a material made of any one of a metal simple substance, an alloy, and glass, or a multi-layer thin film obtained by laminating a plurality of these materials.
Or the overheat detection alarm device according to [2].

[4] The overheat detection alarm device according to any one of [1] to [3], wherein a means for sticking to the device is provided on an outer wall of the sealed container.

[5] The overheat detection alarm device according to any one of [1] to [4], further comprising alarm means for detecting the alarm material exhibiting the alarm state and issuing an alarm signal by voice.

[0016] The overheat detection / warning apparatus according to the present invention comprises [1] to
By adopting the configuration of [3], it is possible to easily and surely detect abnormal overheating of the electric equipment and the like, and even in the case of long-term use, the alarm material may erroneously exhibit an alarm state such as fragrance. However, accurate detection capability can be maintained for a long time. Further, by adopting the configuration of [4], it can be used as a detector only by sticking it to an electric device or the like, and can be a simpler overheat detecting means. further,
With the configuration of [5], an alarm signal by voice can be issued at the same time, so that abnormal overheating of an electric device or the like can be more reliably detected.

[0017]

Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in FIGS. 1 and 2, the overheat detection alarm device of the present invention is an overheat detection alarm device which is directly or indirectly attached and detects an abnormal overheat of the device over a predetermined temperature and issues an alarm signal. And a predetermined sealed container 5 for sealing the alarm material 1 therein, and a predetermined sealed container breaking means 2 for breaking the sealed container 5 at a predetermined temperature.

The alarm material 1 used in the present invention exhibits an alarm state such as scenting or coloring when the device is overheated abnormally. Examples of the device that presents an alarm state by scenting include those that can be recognized by human smell and those that can be recognized only by a separately provided voice detecting device as necessary. Specifically, for example, terpene hydrocarbon, terpene alcohol, aliphatic aldehyde,
Terpene aldehyde aromatic aldehyde, acetal, aliphatic ketone, terpene ketone, aromatic ketone,
Synthetic fragrance materials such as alicyclic ketones, alicyclic ethers, alicyclic lactones, macrocyclic ketones, macrocyclic lactones, synthetic musks, cyclic ethers, heterocyclic compounds, esters of aliphatic acids, etc .; Materials and natural fragrance materials such as vegetable fragrance materials.

Examples of a device which can display an alarm state by color development include a device which can be recognized by human eyes and a device which can be recognized only by an overheat detecting means separately provided as necessary.

The sealed container breaking means 2 used in the present invention
Is to detect abnormal overheating of a device at a temperature higher than a predetermined temperature by raising the temperature of the device above a predetermined temperature and to damage a part of the sealed container 5 made of an inorganic thin film due to a change in shape at the time of the temperature rising above the predetermined temperature. The alarm material 1 is caused to take an alarm state. One end is fixed to the fixed frame 4 and the other end is provided with a sharp projection 2a. It is preferable that the sealed container breaking means 2 includes at least one of a bimetal, a shape memory alloy, and a liquid or a gas whose volume increases due to a temperature rise, and particularly, a bimetal is used. Are preferred. Examples of the bimetal include plywood of brass and nickel, plywood of brass and invar, plywood of monel metal and nickel steel, plywood of nickel steels having different compositions, and plywood of bronze and invar. Examples of the shape memory alloy include a titanium-nickel alloy, a copper-zinc-aluminum alloy, and an iron-manganese-silicon alloy.

The sealed container 5 used in the present invention is formed at least in part from an inorganic thin film 6 and seals the alarm material 1 therein. Thereby, since the components of the alarm material 1 can be shut off from the outside for a long period of time, it can be used for a long period without erroneous detection.

As the inorganic thin film 6, a metal simple substance, an alloy,
Or a single-layer thin film of a material composed of any of glass or a multi-layer thin film obtained by laminating a plurality of these,
Among them, a single-layer thin film of a simple metal or a multilayer thin film in which a plurality of simple metals of different metals are laminated is preferable. As the simple substance of metal, for example, aluminum or the like can be mentioned, and as the alloy, for example, an alloy of aluminum and magnesium can be mentioned. Examples of the multilayer thin film obtained by laminating a plurality of simple metals or the like include, for example, a multilayer thin film obtained by laminating aluminum and magnesium.

The hermetically sealed container 5 has a size, shape, and film thickness that can seal the alarm material 1 in a sufficient amount and that can be broken by the sealed container breaking means 2 when the temperature reaches a predetermined temperature. And However, sealed container breaking means 2
May be provided in the sealed container 5 or may be provided outside.

The sealed container 5 can be formed by bonding an inorganic thin film 6 with an adhesive or metal welding, but when an adhesive is used, a material having low permeability to the components of the alarm material is used. Is preferred.

In the present invention, in order to provide a simpler overheat detecting means, it is preferable to provide, on the outer wall of the sealed container 5, a means for attaching an adhesive or the like to a device to be detected.
In addition, in order to more reliably detect abnormal overheating of the device, an alarming unit that detects the alarm material 1 exhibiting an alarm state and issues an audio alarm signal when the device is abnormally overheated may be further provided.

Next, a series of operations will be described with reference to FIGS. As shown in FIG. 1, when the electrical equipment or the like to which the overheat detection alarm device is attached is in a normal state, the overheat detection alarm device itself has a normal temperature, and thus the sealed container breakage means 2 maintains the initial form. The alarm material 1 is in a state of being sealed in the sealed container 5. However, as shown in FIG. 2, when a failure occurs in an electric device or the like and the temperature rises, the overheating detection alarm device itself also rises in temperature, and the sealed container breaking means 2 changes its shape due to the temperature change. Then, when the sealed container breaking means 2 reaches a predetermined temperature, a part of the sealed container 5 is broken by the protrusion 2a provided at the end thereof. The alarm material 1 enclosed in the sealed container 5 presents an alarm state such as scenting, coloring, etc., and is recognized by human vision or by a separately provided detecting means as needed, and abnormal overheating of the device is detected. Is done.

[0027]

As described above, according to the present invention, it is possible to easily and surely detect abnormal overheating of electric equipment and the like, and to maintain accurate detection capability for a long period of time. A detection alarm device can be provided.

[0028]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing one embodiment of an overheat detection alarm device of the present invention.

FIG. 2 is a cross-sectional view schematically showing a state of the overheat detection alarm device when an electric device or the like to which the overheat detection alarm device is attached reaches a predetermined temperature in one embodiment of the present invention.

[Explanation of symbols]

 1: fragrance material 2: sealed container breaking means 2a: protrusion 4: fixed frame 5: sealed container 6: inorganic thin film

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Noriaki Murobushi 3-1-2 Ikebukuro, Toshima-ku, Tokyo Foundation within the Kanto Electric Security Association (72) Inventor Pan Kasugai 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi Cable Co., Ltd. Hidaka Factory (72) Inventor Tomoya Abe 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture Hitachi Cable Co., Ltd. F-term (reference) 2F056 FM02 FM04 FM06 FM06 FM10 TM07

Claims (5)

[Claims] 1. An overheat detection and warning device which is attached directly or indirectly to a device and detects abnormal overheating of the device at a predetermined temperature or more and issues an alarm signal. An alarm material that exhibits an alarm state; a sealed container at least partially formed of an inorganic thin film, in which the alarm material is sealed; and an abnormal overheating of the device at a predetermined temperature or higher, and an increase in temperature of the device at a predetermined temperature or higher. A sealed container breaking means for causing the alarm material to take the alarm state by causing a part of the inorganic thin film of the sealed container to be damaged by a change in shape when the temperature rises above a predetermined temperature. An overheat detection alarm device characterized by the above-mentioned. 2. The overheat detecting and alarming device according to claim 1, wherein the sealed container breaking means comprises one of a bimetal, a shape memory alloy, and a liquid or a gas whose volume increases with a rise in temperature. 3. The overheat detection alarm according to claim 1, wherein the inorganic thin film is a single-layer thin film made of any one of a metal, an alloy, and glass, or a multi-layer thin film obtained by laminating a plurality of these materials. apparatus. 4. The overheat detecting and alarming device according to claim 1, wherein means for attaching to the device is provided on an outer wall of the sealed container. 5. The overheat detection alarm device according to claim 1, further comprising alarm means for detecting the alarm material exhibiting the alarm state and issuing an audio alarm signal.